This is an HTML version of an attachment to the Official Information request 'Fluoride Supply Chain Information'.
From:
To:
Subject:
Response to request for information re fluoride
Date:
Monday, 8 July 2024 4:00:00 pm
Attachments:
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102 other 102.13 dannevirke water supply fluoridation - moh direction letter tararua(d23 35908).pdf
hfa-safety-data-sheet.pdf
Kia ora
I refer to your official information request dated 7 July 2024 for information relating to the
fluoridation of drinking water by the Tararua District Council.
The information you have requested follows.
Is your council adding fluoride to the water supply YES/NO – not currently.  However our Council
has been directed by the Director General of Health to fluoridate the drinking water supply for
the township of Dannevirke.  The plant is currently under construction, with finalisation due 30
September 2024.
What is the LEGAL name of the company that makes it? The product will be supplied by Ixom
Operations Pty Ltd. We do not have the name of the manufacturer of the product.
What is the specific CHEMICAL name of the product that is added ? HFA (Hydrofluorosilicic Acid)
Please provide an email copy of the MSDS of the product being used.  Please see attached Safety
Data Sheet.
How many PPM are added to the water and how often are they added? Fluoridation of the
Dannevirke drinking water supply has not yet started, however when it does, we have to follow
the Water New Zealand Code of Practice for Fluoridation of Drinking Water Supplies in NZ (2014)
and the Good Practice Guide for Fluoridation of Drinking Water (2023).  This requires HFA to be
added to constantly maintain a content of 0.7 to 1.0 mg/L
What is the name of the person in charge of/who signs off the Water treatment in your area? 
Under section 7(2)(a) of the Local Government Official Information and Meetings Act 1987, we
are withholding names of employees (protection of privacy).  However, fluoridation of the water
supply is undertaken in accordance with the directive received under Sections 116C to 116J of
the Health Act 1956, a copy of which is attached.
A picture of the bag would be great too please if possible. We are not able to provide you with a
picture of a bag, as we do not hold such information.  Therefore we decline this part of your
request under section 17(e) of the Local Government Official Information and Meetings Act
1987.  Note that when fluoridation of the water supply does start, the product will not be
supplied in a bag. The product will be added via an automated containerised dosing unit.
Therefore it will not be possible to provide a picture of a bag at a future stage.
You have the right to seek an investigation and review by the Ombudsman of this decision.
Information about how to make a complaint is available at www.ombudsman.parliament.nz or
freephone 0800 802 602.
Ngā mihi
 
 
 
Allie Dunn | Manager - Democracy Services
Strategy & Community Wellbeing - Democracy Services | Tararua
District Council



   
Phone: +64 6 3744080 | Mobile: +64 27 3331626
[email address]
26 Gordon Street, Dannevirke 4930, PO Box 115
www.tararuadc.govt.nz
www.facebook.com/tararuadc
 
From: Allie Dunn 
Sent: Monday, July 8, 2024 8:17 AM
To: 
Subject: Acknowledgement - request for information re fluoride
 
Kia ora
This email is to acknowledge receipt of your request for information, regarding fluoride added to
water supply.
We will endeavour to respond to your request as soon as possible and in any event no later than
2 August 2024, being 20 working days after the day your request was received. If we are unable
to respond to your request by then, we will notify you of an extension of that timeframe.
As part of our commitment to openness and accountability, we are now proactively publishing
copies of requests for information and the responses provided to these requests, on our
website.  In doing so, we will ensure we comply with the provisions of the Privacy Act 2020 and
redact any personal / identifying information from any response published. 
If you have any questions about this, please don’t hesitate to get in contact with me.
Ngā mihi
 
 
Allie Dunn | Manager - Democracy Services
Strategy & Community Wellbeing - Democracy Services | Tararua
District Council

   
Phone: +64 6 3744080 | Mobile: +64 27 3331626
[email address]
26 Gordon Street, Dannevirke 4930, PO Box 115
www.tararuadc.govt.nz
www.facebook.com/tararuadc
 
 
From: 
 
Sent: Sunday, July 7, 2024 9:40 PM
To: 
Subject: OIA request - WATER DEPARTMENT
 

 
EXTERNAL EMAIL ALERT: Caution advised. This message is from an external sender. Verify the
sender's identity and use caution with attachments and links.
 
To whom it may concern,
 
Please find below - a copy of an email from me to the Dunedin City Council requesting
information on the type of fluoride added to our water supply.
I am requesting under the Local Government Official Information and Meetings Act
1987 (LGOIMA) a copy of the same information from your council please.
Is your council adding fluoride to the water supply YES/NO
What is the LEGAL name of the company that makes it?
What is the specific CHEMICAL name of the product that is added ?
Please provide an email copy of the MSDS of the product being used. 
How many PPM are added to the water and how often are they added?
What is the name of the person in charge of/who signs off the Water treatment in your
area?
AND
A picture of the bag would be great too please if possible. 
 
Thank-You
Kind Regards
Dunedin
 
 
 
 
 
From: 
Sent: Friday, 2 July 2021 8:15 a.m.
To:
Subject: LGOIMA requesting the exact fluoride product added to the water supply
 
Kia ora 
 
I am writing in response to your Local Government Official Information and Meetings Act
1987 (LGOIMA) request of 11 June 2021, for ease of reference a copy your request is
below.
 
The exact fluoride product added to the water supply is Sodium Silico Fluoride (scientific
name) and the manufacturer is Shimonoseki Mitsui Chemical Inc.

 
As requested please find attached photos of the front and back of a bag, fluoride is added
continuously to the metro water supply via the Mt Grand and Southern Water Treatment
Plants at the rate of 0.75 grams per 1000L.
 
I trust this answers your request.
 
Kā mihi
 
 
GOVERNANCE SUPPORT OFFICER
CIVIC              
 
 
 
Dunedin City Council, 50 The Octagon, Dunedin
PO Box 5045, Dunedin 9054
New Zealand
www.dunedin.govt.nz
 


 
133 Molesworth Street 
PO Box 5013 
Wellington 6140 
New Zealand 
T+64 4 496 2000 
27 July 2022 
Bryan Nicholson 
Chief Executive 
Tararua District Council  
[email address] 
 
Tēnā koe Mr Nicholson 
Decision in relation to fluoridation direction  
Thank you for responding to my letter of 3 May 2022. I have considered the information 
you have provided, alongside further information I am required to consider under 
section 116E of the Health Act 1956 (the Act). I have also received and considered 
advice from the Director of Public Health. 
Informed by the matters I am required to consider, I have decided to exercise my 
statutory powers under section 116E of the Act to direct you to fluoridate the Dannevirke 
drinking water supply in your region.  
In accordance with section 116I of the Act, you are required to ensure that by 30 June 
2024 you are fluoridating at the optimal levels (between 0.7ppm to 1ppm, parts per 
million) at the Dannevirke supply. Contravening these requirements, or permitting these 
requirements to be contravened, constitutes an offence under section 116J of the Act. 
Fluoridation of the Dannevirke drinking water supply is an important step in improving 
the oral health of your community, and it is my intention that Manatū Hauora (the 
Ministry of Health) will work constructively with you to implement these important 
changes. 
In reaching my decision to issue this direction to you, I considered the scientific 
evidence on the effectiveness of adding fluoride to drinking water in reducing the 
prevalence and severity of dental decay. I am satisfied that community water 
fluoridation is a safe and effective public health measure that significantly reduces the 
prevalence and severity of dental decay. In reaching this conclusion, I considered: 
Water fluoridation to prevent tooth decay (Cochrane Collaboration 2015), Health effects 
of water fluoridation: A review of the scientific evidence
 (PMCSA and Royal Society Te 
Apārangi 2014) and Fluoridation: An update on evidence (PMCSA 2021). 
In reaching my decision, I also considered whether the benefits of adding fluoride to the 
drinking water outweigh the financial costs, taking into account: the state or likely state 
of the oral health of your community served by the Dannevirke supply; the number of 
people who are reasonably likely to receive drinking water from this supply; and the 

likely financial cost and savings of adding fluoride to the drinking water of this supply, 
including any additional financial costs of ongoing management and monitoring. 
I am satisfied that the benefits of introducing community water fluoridation across the 
Dannevirke drinking water supply outweigh the financial costs of doing so. In reaching 
this conclusion, I gave weight to the following: 
•  the Tararua community would receive significant benefit, through improvement 
to the state of its oral health, because fluoridation of the drinking water supply 
would significantly reduce the prevalence and severity of dental decay in its 
community 
•  approximately 6,000 people are reasonably likely to receive drinking water from 
the Dannevirke supply 
•  the likely financial cost and savings of adding fluoride to drinking water for the 
Dannevirke supply, including any additional financial costs of ongoing 
management and monitoring. 
My decision-making process included inviting written comment from Tararua District 
Council and having regard to the comments I received. Below I summarise and respond 
to the comments I received: 
•  the estimated capital cost of introducing fluoridation for the Dannevirke supply is 
$318,850. Ongoing management and monitoring costs were not specified at this 
time. 
•  the date by which Tararua District Council would be able to comply with a 
direction for the Dannevirke drinking water supply is 30 June 2024. 
As part of considering whether to issue a direction to fluoridate, I considered the cost 
estimates you provided. I also accept the date you specified by which you could comply 
with a direction for the Dannevirke drinking water supply. This date is reflected in the 
compliance date stated earlier in this letter.  
Appendix 1 presents a more extensive summary of the information that informed my 
decision-making, including the advice I received and considered from the Director of 
Public Health. 
Funding 
Manatū Hauora is making capital works funding available for local authorities that have 
been issued a direction to fluoridate, and that begin work to fluoridate drinking water 
supplies by the end of 2022. It will shortly provide detailed information about the 
application process for this funding to cover fluoridation-related capital costs.  
Communicating this ‘direction to fluoridate’ decision  
Manatū Hauora is responsible for communicating this decision at a national level. 
Please note too, that as required under section 116E(5) of the Act, all direction letters 
will be published on the Manatū Hauora website in due course. 
 
 
Page 2 of 3 
 


Next steps 
An official from Manatū Hauora will contact your team in the coming weeks to discuss 
any needs you might have for further clarity or additional information. Manatū Hauora 
recognises that this is a busy time for local authorities and wishes to work with you to 
make the process as straightforward as possible for your team. 
 
Nākū noa, nā 
 
 
Dr Ashley Bloomfield 
                                                            
                                                                                                                  
Te Tumu Whakarae mō te Hauora 
Director-General of Health                                                 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Page 3 of 3 
 










SAFETY DATA SHEET  
Revision date:   06-Jun-2023  
Revision Number   7  
1. IDENTIFICATION OF THE MATERIAL AND SUPPLIER 
 
Product identifier 

Product Name 
HYDROFLUOROSILICIC ACID 
Product Code(s) 
000000015539 
Other means of identification 
UN number 
1778  
Synonyms 
Hydrofluorosilicic acid;   Hydrofluosilicic acid;   Hydrosilicofluoric acid;   Silicate(2-), 
hexafluoro-, dihydrogen;  Fluorosilicic acid;  HFA.  
Recommended use of the chemical and restrictions on use 
Recommended use 
Fluoridation of water.  
Uses advised against 
No information available  
Details of the supplier of the safety data sheet 
Supplier
Ixom Operations Pty Ltd (Incorporated in Australia) 
NZBN: 9429041465226 Address: 166 Totara Street
Mt Maunganui South 
New Zealand 
Telephone Number: +64 9 368 2700 
Facsimile: +64 9 368 2710  
 
For further information, please contact  

Contact Point 
Product Safety Department  
 
Emergency telephone number 

Emergency Telephone 
0 800 734 607 (ALL HOURS)  
Please ensure you refer to the limitations of this Safety Data Sheet as set out in the "Other Information" section at the end of this Data Sheet.  
2. HAZARDS IDENTIFICATION 
Classified as a Dangerous Good according to NZS 5433 Transport of Dangerous Goods on Land;   DANGEROUS GOODS.
Classified as hazardous according to criteria in the Hazardous Substances (Hazard Classification) Notice 2020.  
GHS Classification  
SIGNAL WORD
Danger  
Water Treatment Chemicals (Corrosive) Group Standard 2020 
Approval Number: HSR002681  
_____________________________________________________________________________________________  
Page     1 / 11  




000000015539 -   HYDROFLUOROSILICIC ACID 
Revision date:   06-Jun-2023  
Revision Number   7  
_____________________________________________________________________________________________  
Corrosive to metals  
Category 1  
Acute toxicity - Oral 
Category 4  
Acute toxicity - Dermal 
Category 4  
Acute toxicity - Inhalation (Dusts/Mists) 
Category 4  
Skin corrosion/irritation 
Category 1  Sub-category C  
Serious eye damage/eye irritation 
Category 1  
Specific target organ toxicity (single exposure) 
Category 1  
Label elements  
Hazard statements  
H290 - May be corrosive to metals
H302 - Harmful if swallowed
H312 - Harmful in contact with skin
H314 - Causes severe skin burns and eye damage
H318 - Causes serious eye damage
H332 - Harmful if inhaled
H370 - Causes damage to organs  
Precautionary Statements - Prevention
Keep out of reach of children.
Do not breathe dusts or mists
Wash face, hands and any exposed skin thoroughly after handling
Do not eat, drink or smoke when using this product
Use only outdoors or in a well-ventilated area
Wear protective gloves / protective clothing / eye protection / face protection  
Precautionary Statements - Response
IF exposed: Call a POISON CENTER or doctor/physician
Specific treatment (see First aid on this SDS)  
IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing
Immediately call a POISON CENTER or doctor/physician  
IF ON SKIN: Wash with plenty of soap and water
IF ON SKIN (or hair): Remove/Take off immediately all contaminated clothing. Rinse skin with water/shower
Wash contaminated clothing before reuse  
IF INHALED: Remove victim to fresh air and keep at rest in a position comfortable for breathing
Immediately call a POISON CENTER or doctor/physician  
IF SWALLOWED: Rinse mouth. DO NOT induce vomiting
IF SWALLOWED: Immediately call a POISON CENTER or doctor/physician  
Precautionary Statements - Storage
Store locked up  
Precautionary Statements - Disposal
Dispose of contents/container in accordance with local, regional, national, and international regulations as applicable  
Other hazards which do not result in classification  
 
3. COMPOSITION/INFORMATION ON INGREDIENTS 
Mixture 
 
Chemical name 
CAS No. 
Weight-% 
Fluorosilicic acid 
16961-83-4 
21.0-23.0% 
_____________________________________________________________________________________________  
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000000015539 -   HYDROFLUOROSILICIC ACID 
Revision date:   06-Jun-2023  
Revision Number   7  
_____________________________________________________________________________________________  
Hydrofluoric acid 
7664-39-3 
0.1-<1.0% 
Water 
7732-18-5 
to 100% 
4. FIRST AID MEASURES 
Description of first aid measures 
General advice 
For advice, contact a Poisons Information Centre (e.g. phone Australia 13 11 26; New 
Zealand 0800 764 766) or a doctor. Immediate medical attention is required. Show this 
safety data sheet to the doctor in attendance.  
Emergency telephone number 
Poisons Information Center, New Zealand: 0800 764 766
Poisons Information Center, Australia: 13 11 26  
Inhalation 
Remove to fresh air and keep at rest in a position comfortable for breathing. If breathing is 
difficult, (trained personnel should) give oxygen. If breathing is irregular or stopped, 
administer artificial respiration. Seek immediate medical attention/advice.  
Eye contact 
Rinse immediately with plenty of water, also under the eyelids, for at least 15 minutes. 
Remove contact lenses, if present and easy to do. Continue rinsing. Do not rub affected 
area. Immediate medical attention is required.  
Skin contact 
Wash off immediately with plenty of water for at least 15 minutes. Then apply calcium 
gluconate gel. Take off contaminated clothing and wash before reuse. Get immediate 
medical advice/attention.  
Ingestion 
Rinse mouth immediately and drink plenty of water. Do NOT induce vomiting. Never give 
anything by mouth to an unconscious person. Get immediate medical advice/attention.  
Most important symptoms and effects, both acute and delayed 
Symptoms 
Irritation/Corrosion. May cause redness and tearing of the eyes. Erythema (skin redness). 
Burning.  
Indication of any immediate medical attention and special treatment needed 
Note to physicians 
Treat symptomatically. Can cause corneal burns. Delayed pulmonary edema may occur. 
Delayed health effects.  
5. FIRE FIGHTING MEASURES 
Suitable Extinguishing Media 
Suitable Extinguishing Media 
Dry chemical, CO2, water spray or regular foam.  
Unsuitable extinguishing media 
No information available.  
Specific hazards arising from the chemical 
Specific hazards arising from the 
Corrosive hazard. Wear protective gloves/clothing and eye/face protection. 
chemical 
Non-combustible, substance itself does not burn but may decompose upon heating to 
produce corrosive and/or toxic fumes.  
Special protective actions for fire-fighters 
Special protective equipment for 
Firefighters should wear self-contained breathing apparatus and full firefighting turnout 
_____________________________________________________________________________________________  
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000000015539 -   HYDROFLUOROSILICIC ACID 
Revision date:   06-Jun-2023  
Revision Number   7  
_____________________________________________________________________________________________  
fire-fighters 
gear. Use personal protection equipment.  
Hazchem code 
2X  
6. ACCIDENTAL RELEASE MEASURES 
Personal precautions, protective equipment and emergency procedures 
Personal precautions 
Attention! Corrosive material. Avoid contact with skin and eyes. Do not breathe vapor or 
mist. Ensure adequate ventilation. Evacuate personnel to safe areas. Do not touch or walk 
through spilled material. Do not eat, drink or smoke when using this product. Wear 
protective gloves/protective clothing and eye/face protection. Wash thoroughly after 
handling.  
For emergency responders 
Clear area of all unprotected personnel. Use personal protection recommended in Section 
8.  
Environmental precautions 
Environmental precautions 
Prevent further leakage or spillage if safe to do so. Prevent product from entering drains. 
Refer to protective measures listed in Sections 7 and 8.  
Methods and material for containment and cleaning up 
Methods for containment 
Stop leak if you can do it without risk. Do not touch or walk through spilled material. Dike far 
ahead of spill to collect runoff water. Absorb with earth, sand or other non-combustible 
material and transfer to containers for later disposal. Keep out of drains, sewers, ditches 
and waterways.  
Methods for cleaning up 
Soak up with inert absorbent material. Use personal protective equipment as required. Pick 
up and transfer to properly labelled containers.  
Precautions to prevent secondary hazards 
Prevention of secondary hazards 
Clean contaminated objects and areas thoroughly observing environmental regulations.  
7. HANDLING AND STORAGE 
Precautions for safe handling 
Advice on safe handling 
Do not breathe vapor or mist. Avoid contact with skin, eyes, and clothing. Ensure adequate 
ventilation. Use personal protection equipment. Use according to package label 
instructions. Handle in accordance with good industrial hygiene and safety practice. Always 
add the acid to water, never the reverse. Keep out of reach of children. Not to be available 
except to authorised or licensed persons.  
General hygiene considerations 
Take off contaminated clothing and wash it before reuse. Do not eat, drink or smoke when 
using this product. Wash hands before breaks and immediately after handling the product.  
Conditions for safe storage, including any incompatibilities 
Storage Conditions 
Keep containers tightly closed in a cool, well-ventilated place. Store locked up. Store away 
from foodstuffs. Store away from incompatible materials described in Section 10. Keep 
container closed when not in use.  
Incompatible materials 
Alkalis. Organic compounds. Metals.  
_____________________________________________________________________________________________  
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000000015539 -   HYDROFLUOROSILICIC ACID 
Revision date:   06-Jun-2023  
Revision Number   7  
_____________________________________________________________________________________________  
8. EXPOSURE CONTROLS/PERSONAL PROTECTION 
Control parameters 
Exposure Limits 
No value assigned for this specific material by the New Zealand Workplace Health & Safety 
Authority.   However, Workplace Exposure Standard(s) for constituent(s):  
Chemical name 
New Zealand 
ACGIH 
Hydrofluoric acid 
2 mg/L urine prior to shift Fluoride 
 7664-39-3 
3 mg/L urine end of shift Fluoride 
Fluorides, as F: WES-TWA 2.5 mg/m3, bio 
Hydrogen fluoride, as F: Ceiling 3 ppm, 2.6 mg/m3 
As published by the New Zealand Workplace Health & Safety Authority. 
WES - TWA (Workplace Exposure Standard - Time Weighted Average) - The eight-hour, time-weighted average exposure 
standard is designed to protect the worker from the effects of long-term exposure.
The Biological Exposure Indices (bio) are not applicable to non-metal fluorides and organic fluoride-containing compounds. 
WES - Ceiling (Workplace Exposure Standard - Ceiling). A concentration that should not be exceeded during any part of the 
working day. 
These Workplace Exposure Standards are guides to be used in the control of occupational health hazards. All atmospheric 
contamination should be kept to as low a level as is workable.   These workplace exposure standards should not be used as fine 
dividing lines between safe and dangerous concentrations of chemicals.   They are not a measure of relative toxicity.
Appropriate engineering controls 
Engineering controls 
Apply technical measures to comply with the occupational exposure limits. 
If in the handling and application of this material, safe exposure levels could be exceeded, 
the use of engineering controls such as local exhaust ventilation must be considered and 
the results documented. If achieving safe exposure levels does not require engineering 
controls, then a detailed and documented risk assessment using the relevant Personal 
Protective Equipment (PPE) (refer to PPE section below) as a basis must be carried out to 
determine the minimum PPE requirements.  
Individual protection measures, such as personal protective equipment 
The selection of PPE is dependent on a detailed risk assessment.   The risk assessment should consider the work situation, the 
physical form of the chemical, the handling methods, and environmental factors.
    OVERALLS, CHEMICAL GOGGLES, FACE SHIELD, GLOVES (Long), APRON, RUBBER BOOTS.
Eye/face protection 
Tight sealing safety goggles. If splashes are likely to occur:. Face protection shield.  
Hand protection 
Elbow-length impervious gloves.  
_____________________________________________________________________________________________  
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000000015539 -   HYDROFLUOROSILICIC ACID 
Revision date:   06-Jun-2023  
Revision Number   7  
_____________________________________________________________________________________________  
Skin and body protection 
Overalls. Boots. Splash apron or equivalent chemical impervious outer garment.  
Respiratory protection 
If determined by a risk assessment an inhalation risk exists, wear a suitable mist respirator 
meeting the requirements of AS/NZS 1715 and AS/NZS 1716.  
Environmental exposure controls 
No information available.  
9. PHYSICAL AND CHEMICAL PROPERTIES 
Information on basic physical and chemical properties  
Physical state 

Liquid  
Appearance 
No information available  
Color 
Pale Yellow  
Odor 
Characteristic , Pungent , Acidic  
Odor threshold 
No information available  
Property 
Values  
Remarks   • Method  
pH 
No data available  
None known  
Melting point / freezing point 
-15°C to -21°C  
None known  
Boiling point / boiling range 
>100°C  
None known  
Flash point 
Not applicable  
None known  
Evaporation rate 
No data available  
None known  
Flammability (solid, gas) 
No data available  
None known  
Flammability Limit in Air 
None known  
Upper flammability or explosive 
Not applicable  
limits 
Lower flammability or explosive  
Not applicable  
limits 
Vapor pressure 
18 mm Hg @20°C  
None known  
Vapor density 
No data available  
None known  
Relative density 
1.16-1.22 @20°C  
None known  
Water solubility 
Miscible in water  
None known  
Solubility(ies) 
No data available  
None known  
Partition coefficient 
No data available  
None known  
Autoignition temperature 
Not applicable  
None known  
Decomposition temperature 
105°C  
None known  
Kinematic viscosity 
No data available  
None known  
Dynamic viscosity 
No data available  
None known  
Other information  
10. STABILITY AND REACTIVITY 
Reactivity 
Reactivity 
Corrosive to metals. Reacts with alkalis.  
Chemical stability 
Stability 
Stable under normal ambient and anticipated storage and handling conditions of 
temperature and pressure.  
Explosion data 
Sensitivity to mechanical impact 
None.  
Sensitivity to static discharge 
None.  
_____________________________________________________________________________________________  
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000000015539 -   HYDROFLUOROSILICIC ACID 
Revision date:   06-Jun-2023  
Revision Number   7  
_____________________________________________________________________________________________  
Possibility of hazardous reactions 
Possibility of hazardous reactions  Contact with metals may evolve flammable hydrogen gas. Hydrogen fluoride will react with 
all silicon containing materials such as glass, concrete, and chemical spill sorbents such as 
vermiculite. This reaction will cause the generation of the highly toxic gas, silicon 
tetrafluoride.  
Conditions to avoid 
Conditions to avoid 
Contact with foodstuffs.  
Incompatible materials 
Incompatible materials 
Alkalis. Organic compounds. Metals.  
Hazardous decomposition products 
Hazardous decomposition products Hydrogen fluoride. Oxides of silicon. Fluorides.  
11. TOXICOLOGICAL INFORMATION 
 
Acute toxicity

Information on likely routes of exposure  
Product Information 
No adverse health effects expected if the chemical is handled in accordance with this 
Safety Data Sheet and the chemical label.   Symptoms or effects that may arise if the 
chemical is mishandled and overexposure occurs are:  
Inhalation 
May cause irritation. Delayed (up to 48hours) fluid build up in the lungs may occur.  
Eye contact 
Corrosive to the eyes and may cause severe damage including blindness.  
Skin contact 
Contact causes severe skin irritation and possible burns.  
Ingestion 
Ingestion may cause gastrointestinal irritation, nausea, vomiting and diarrhoea. Can burn 
mouth, throat, and stomach.  
Symptoms 
Irritation/Corrosion. May cause redness and tearing of the eyes. Erythema (skin redness). 
Burning.  
Acute toxicity 
Numerical measures of toxicity  
Refer to component information below.  
Component Information 
 
Chemical name 
Oral LD50 
Dermal LD50 
Inhalation LC50 
Fluorosilicic acid 
= 430 mg/kg  ( Rat ) 

= 1.11 mg/L   ( Rat ) 1 h 
Hydrofluoric acid 


= 0.79 mg/L   ( Rat ) 1 h 
See section 16 for terms and abbreviations  
 
Delayed and immediate effects as well as chronic effects from short and long-term exposure  

Skin corrosion/irritation 
Causes burns. Classification is based on mixture calculation methods based on component 
data.  
 
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Serious eye damage/eye irritation 
Causes serious eye damage. Classification is based on mixture calculation methods based 
on component data.  
 
Respiratory or skin sensitization 

No information available.  
 
Germ cell mutagenicity 

No information available.  
 
Carcinogenicity 

Fluoride ion has been classified by the International Agency for Research on Cancer 
(IARC) as a Group 3 agent. Group 3 - The agent is not classifiable as to its carcinogenicity 
to humans. Data available is insufficient for an assessment to be made.  
 
Reproductive toxicity 

No information available.  
 
STOT - single exposure 

No information available.  
 
STOT - repeated exposure 

Causes damage to organs. Classification is based on mixture calculation methods based 
on component data.  
Aspiration hazard 
No information available.  
Chronic effects: 
Repeated or prolonged exposure may result in bone changes (fluorosis). Fluorosis in 
humans can result with the repeated ingestion of >6mg of fluorine per day.   The fluoride 
accumulates in bone and can lead to the development of osteosclerosis and other bone 
changes.   Teeth may also be affected.  
Symptoms of fluorosis may include weight loss, brittle bones, anaemia, weakness and 
stiffness of joints.  
12. ECOLOGICAL INFORMATION 
Ecotoxicity 
Ecotoxicity 
Keep out of waterways. Avoid contaminating waterways.  
Terrestrial ecotoxicity 
There is no data for this product.  
Chemical name 
Algae/aquatic plants 
Fish 
Crustacea 
Fluorosilicic acid 

LC50: =65mg/L (96h, Poecilia 

reticulata) LC50: =28.7mg/L (96h, 
Pimephales promelas) 
Hydrofluoric acid 

LC50: =660mg/L (48h, Leuciscus 
EC50: =270mg/L (48h, Daphnia 
idus) 
species) 
Persistence and degradability 
Persistence and degradability 
No information available.  
Bioaccumulative potential 
Bioaccumulation 
No information available.  
Mobility 
Mobility in soil 
No information available.  
Chemical name 
Partition coefficient 
Hydrofluoric acid 
-1.4 
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Other adverse effects 
Other adverse effects 
No information available.  
13. DISPOSAL CONSIDERATIONS 
Waste treatment methods 
Waste from residues/unused 
Dispose of product in packaging/container in a way that is consistent with the Hazardous 
products 
Substances (Disposal) Notice 2017 and the Act, and Hazardous Substances (Amendments 
and Revocations) Notice 2020. Treat the chemical using a method that changes the 
characteristics or composition of the chemical so that the chemical is no longer a hazardous 
chemical; or export the chemical from New Zealand as waste. Class 6 and 8 chemicals – 
may be discharged into the environment if a tolerable exposure limit has been set for the 
substance (or a component of that chemical); and the discharge does not, after reasonable 
mixing, result in the concentration of the substance in an environmental medium exceeding 
the tolerable exposure limit. If there is not tolerable exposure limit for the substance, then it 
may only be discharged into the environment if the substance is very rapidly converted to 
substances that are not hazardous substances.  
Contaminated packaging 
For packages that have been in direct contact with hazardous chemicals, the person must 
ensure that the package is rendered incapable of containing any chemical. It must be 
disposed of in a manner that is consistent with the requirements for disposal of the 
chemical that it contained, taking into account the material the package is manufactured 
from. Packages may only be reused or recycled if the package has been treated to remove 
any residual contents of the hazardous chemical (class 1, 2, 3, 4, or 5); or the contents of 
the residue in the package are below the threshold for the chemical to be classified as 
hazardous (class 6, 8, or 9 chemical).  
14. TRANSPORT INFORMATION 
ROAD AND RAIL TRANSPORT 
Classified as a Dangerous Good according to NZS 5433 Transport of Dangerous Goods on 
Land;  DANGEROUS GOODS.
UN number 
1778  
Proper shipping name 
FLUOROSILICIC ACID  
Hazard class 
8  
Packing group 
II  
Hazchem code 
2X  
IATA 
Classified as Dangerous Goods by the criteria of the International Air Transport Association 
(IATA) Dangerous Goods Regulations for transport by air;   DANGEROUS GOODS.
UN number 
1778  
UN proper shipping name 
FLUOROSILICIC ACID  
Transport hazard class(es) 
8  
Packing group 
II  
IMDG 
Classified as Dangerous Goods by the criteria of the International Maritime Dangerous 
Goods Code (IMDG Code) for transport by sea;   DANGEROUS GOODS.
UN number 
1778  
UN proper shipping name 
FLUOROSILICIC ACID  
Transport hazard class(es) 
8  
Packing group 
II  
IMDG EMS Fire 
F-A  
IMDG EMS Spill 
S-B  
Marine pollutant 
No  
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15. REGULATORY INFORMATION 
Safety, health and environmental regulations/legislation specific for the substance or mixture
New Zealand 
National regulations 
See section 8 for national exposure control parameters  
.  
International Inventories 
NZIoC 

All the constituents of this material are listed on the New Zealand Inventory of Chemicals.  
TSCA 
Contact supplier for inventory compliance status.  
DSL/NDSL 
Contact supplier for inventory compliance status.  
EINECS/ELINCS 
Contact supplier for inventory compliance status.  
ENCS 
Contact supplier for inventory compliance status.  
IECSC 
Contact supplier for inventory compliance status.  
KECL 
Contact supplier for inventory compliance status.  
PICCS 
Contact supplier for inventory compliance status.  
AIIC 
All the constituents of this material are listed on the Australian Inventory of Industrial 
Chemicals.  
 Legend:     
 NZIoC  - New Zealand Inventory of Chemicals  
 TSCA  
 - United States Toxic Substances Control Act Section 8(b) Inventory  
 DSL/NDSL    - Canadian Domestic Substances List/Non-Domestic Substances List  
 EINECS/ELINCS    - European Inventory of Existing Chemical Substances/European List of Notified Chemical Substances  
 ENCS   - Japan Existing and New Chemical Substances  
 IECSC   - China Inventory of Existing Chemical Substances  
 KECL   - Korean Existing and Evaluated Chemical Substances  
 PICCS    - Philippines Inventory of Chemicals and Chemical Substances  
 AIIC- Australian Inventory of Industrial Chemicals  
International Regulations
The Montreal Protocol on Substances that Deplete the Ozone Layer   Not applicable  
The Stockholm Convention on Persistent Organic Pollutants   Not applicable  
The Rotterdam Convention   Not applicable  
16. OTHER INFORMATION 
Prepared By 
This Safety Data Sheet has been prepared by Ixom Operations Pty Ltd (Toxicology and 
SDS Services).  
Issuing Date: 
06-Jun-2023  
Reason(s) For Issue: 
Change in Physical Properties
Revision Note: 
The symbol (*) in the margin of this SDS indicates that this line has been revised.  
Key or legend to abbreviations and acronyms used in the safety data sheet  
Legend  Section 8: EXPOSURE CONTROLS/PERSONAL PROTECTION  
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TWA 
TWA (time-weighted average)  
STEL 
STEL (Short Term Exposure Limit)  
Ceiling 
Maximum limit value  

Skin designation  

Carcinogen  
Key literature references and sources for data used to compile the SDS  
Agency for Toxic Substances and Disease Registry (ATSDR)  
U.S. Environmental Protection Agency ChemView Database  
European Food Safety Authority (EFSA)  
EPA (Environmental Protection Agency)  
Acute Exposure Guideline Level(s) (AEGL(s))  
U.S. Environmental Protection Agency Federal Insecticide, Fungicide, and Rodenticide Act  
U.S. Environmental Protection Agency High Production Volume Chemicals  
Food Research Journal  
Hazardous Substance Database  
International Uniform Chemical Information Database (IUCLID)  
Japan GHS Classification  
Australian Industrial Chemicals Introduction Scheme (AICIS)  
NIOSH (National Institute for Occupational Safety and Health)  
National Library of Medicine's ChemID Plus (NLM CIP)  
National Library of Medicine's PubMed database (NLM PUBMED)  
National Toxicology Program (NTP)  
New Zealand's Chemical Classification and Information Database (CCID)  
Organization for Economic Co-operation and Development Environment, Health, and Safety Publications  
Organization for Economic Co-operation and Development High Production Volume Chemicals Program  
Organization for Economic Co-operation and Development Screening Information Data Set  
RTECS (Registry of Toxic Effects of Chemical Substances)  
World Health Organization  
Disclaimer
This SDS summarises to our best knowledge at the date of issue, the chemical health and safety hazards of the material 
and general guidance on how to safely handle the material in the workplace.   Since Ixom Operations Pty Ltd cannot 
anticipate or control the conditions under which the product may be used, each user must, prior to usage, assess and 
control the risks arising from its use of the material.

If clarification or further information is needed, the user should contact their Ixom representative or Ixom Operations Pty 
Ltd at the contact details on page 1.

Ixom Operations Pty Ltd's responsibility for the material as sold is subject to the terms and conditions of sale, a copy of 
which is available upon request.  

End of Safety Data Sheet  
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