Substance profile
Ammonium fluoride
Ammonium fluoride is deliquescent leaflets or needles; hexagonal prisms by sublimation and is odorless.
01 · Identification
What Ammonium fluoride is
Ammonium fluoride is deliquescent leaflets or needles; hexagonal prisms by sublimation and is odorless. Its molecular formula is FH4N and its molecular weight is 37.037 g/mol. It boils at 100 °C, melts at 238 °C.
Under the GHS it carries the signal word Danger.
02 · Identifiers
Ammonium fluoride identifiers and molecular data
Ammonium fluoride CAS number and EC number
Ammonium fluoride molecular formula and molecular weight
03 · GHS classification
Ammonium fluoride hazard classification
Harmonised classification under CLP Annex VI. This is the legally binding classification in the EU; other jurisdictions may differ.
Ammonium fluoride pictograms and signal word
Ammonium fluoride hazard class and category
| Hazard class | Category | From code | Pictogram |
|---|---|---|---|
| Acute toxicity - oral GHS chapter 3.1 | Category 3 | H301 | GHS06 |
| Acute toxicity - dermal GHS chapter 3.1 | Category 3 | H311 | GHS06 |
| Acute toxicity - inhalation GHS chapter 3.1 | Category 3 | H331 | GHS06 |
Ammonium fluoride hazard statements (H-codes)
| Code | Hazard statement |
|---|---|
| H331 | Toxic if inhaled. |
| H311 | Toxic in contact with skin. |
| H301 | Toxic if swallowed. |
This page lists only the codes assigned to Ammonium fluoride. The full reference lives on the hazard statements hub, the precautionary statements hub and the GHS pictograms hub.
Safety Data Sheet
Getting an SDS for Ammonium fluoride
A Safety Data Sheet is written for a product, not for a substance: the supplier of the grade you actually buy issues it, so two suppliers of Ammonium fluoride issue two different sheets. That is why there is no single authoritative SDS for a substance to download — what there is, is the job of collecting the sheets for the products you hold and keeping them current as suppliers revise them.
04 · Precautionary statements
Ammonium fluoride precautionary statements
CLP Annex VI assigns 10 precautionary statements to Ammonium fluoride. They are grouped the way a label groups them: what to do before handling, what to do when something has already happened, how to store it and how to dispose of it.
Prevention
What to do before and during handling so the hazard never happens.
Response
What to do once exposure, spillage or fire has already happened.
Reading the notation. … is a blank the supplier fills in — not a truncated sentence.· [square brackets] mark a part printed only when it applies.
05 · Names in the regulation
Ammonium fluoride name in 23 EU languages
CLP Annex VI Part 3 is published in every language edition of the regulation, and the identification column is written out in each of them. Nothing below is translated by us: each line is the name as that edition prints it. Under Art. 18(2) the substance name from Annex VI is a lawful product identifier, so this is the wording to put on a label going to that market — and where the cell lists several designations, any one of them qualifies.
| Language | Name in CLP Annex VI Part 3 |
|---|---|
| Bulgarian български | амониев флуорид |
| Spanish español | Fluoruro de amonio |
| Czech čeština | fluorid amonný |
| Danish dansk | ammoniumfluorid |
| German Deutsch | Ammoniumfluorid |
| Estonian eesti | ammooniumfluoriid |
| Greek ελληνικά | φθοριούχο αμμώνιο |
| English English | ammonium fluoride |
| French français | fluorure d'ammonium |
| Croatian hrvatski | amonijev fluorid |
| Italian italiano | fluoruro d'ammonio |
| Latvian latviešu | amonija fluorīds |
| Lithuanian lietuvių | amonio fluoridas |
| Hungarian magyar | ammónium-fluorid |
| Maltese Malti | fluworur tal-ammonju |
| Dutch Nederlands | ammoniumfluoride |
| Polish polski | fluorek amonu |
| Portuguese português | fluoreto de amónio |
| Romanian română | fluorură de amoniu |
| Slovak slovenčina | fluorid amónny |
| Slovenian slovenščina | amonijev fluorid |
| Finnish suomi | ammoniumfluoridi |
| Swedish svenska | ammoniumfluorid |
All 23 language editions of Annex VI carry this entry. Irish is the twenty-fourth official EU language and has no line here for a different reason: no consolidated CLP text has ever been published in Irish, so there is no Irish edition of Annex VI to quote a name from. Source: consolidated CLP, CELEX 02008R1272, language editions. © European Union, https://eur-lex.europa.eu — only the electronic Official Journal of the European Union is authentic.
06 · Label elements
Ammonium fluoride GHS label elements
Everything CLP Annex VI fixes for Ammonium fluoride, laid out the way it appears on a label. The greyed lines are the parts only the supplier can fill in.
Danger
Ammonium fluoride
- Toxic if inhaled.
- Toxic in contact with skin.
- Toxic if swallowed.
- Do not breathe dust/fume/gas/mist/vapours/spray.
- 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/hearing protection/…
- IF SWALLOWED:
- IF ON SKIN:
- IF INHALED:
- Immediately call a POISON CENTER/doctor/…
- Rinse mouth.
- Wash with plenty of water/…
Supplier name, address and telephone number· Product identifier·Nominal quantity
Need this as an actual label? Open Ammonium fluoride in the GHS label constructor →
07 · Health hazards
Ammonium fluoride health hazards and exposure limits
Ammonium fluoride hazard summary
A skin, eye, and respiratory tract irritant; May cause fluorosis; [ICSC] A corrosive substance that can cause injury to the skin, eyes, and respiratory tract; Can be absorbed through skin; Targets bones; [MSDSonline] See FLUORIDES.
Source: Haz-Map, Information on Hazardous Chemicals and Occupational Diseases
Ammonium fluoride occupational exposure limits
| Limit | Value | Source |
|---|---|---|
| PEL | 2.5 [mg/m3], as F | Haz-Map, Information on Hazardous Chemicals and Occupational Diseases |
| IDLH | 250 mg/cu m /Sodium fluorides (as F)/ | Hazardous Substances Data Bank (HSDB) |
These are United States values. The European Union sets its own indicative and binding limits, and the figure that applies at a given workplace is the one in the local regulation — not the one shown here.
08 · Physical and chemical properties
Ammonium fluoride properties
Every value is shown with the conditions it was measured under and the source it came from. Where sources disagree, all values are listed rather than one being picked — the difference is usually a different form of the substance, not an error.
Ammonium fluoride boiling point
| Property | Value | Conditions | Source |
|---|---|---|---|
| Boiling point | 100 °C (212 °F) | at 760 mmHg | CAMEO |
Ammonium fluoride melting point
| Property | Value | Conditions | Source |
|---|---|---|---|
| Melting point | 238 °C (460.4 °F) | HSDB | |
| 126 °C (258.8 °F) | DOE PAC | ||
| sublimes | sublimes | ICSC |
Ammonium fluoride density
| Property | Value | Conditions | Source |
|---|---|---|---|
| Density | 1.015 g/cm³ | HSDB | |
| 1.01 g/cm³ | ICSC | ||
| 1.32 g/cm³ | at 25 °C | CAMEO |
Ammonium fluoride solubility
| Property | Value | Conditions | Source |
|---|---|---|---|
| Solubility | 82.780 lb/100 lb of water at 70 °F | at 21.11 °C | HSDB |
| 83.5 g/100 g water at 25 °C | at 25 °C | HSDB | |
| 45.3 g/100 g water at 25 °C | at 25 °C | HSDB |
Ammonium fluoride lower explosive limit (LEL)
| Property | Value | Conditions | Source |
|---|---|---|---|
| Lower explosive limit (LEL) | Not flammable | HSDB |
Ammonium fluoride corrosivity
| Property | Value | Conditions | Source |
|---|---|---|---|
| Corrosivity | Corrodes glass | HSDB | |
| At fire temp corrodes metals | HSDB | ||
| May corrode cement | HSDB |
Values compiled from PubChem Laboratory Chemical Safety Summary. Temperatures converted to Fahrenheit for reference.
09 · Fire and explosion
Ammonium fluoride fire and explosion behaviour
These are descriptions rather than measured values, so they are kept out of the table above and quoted here with the source that reported them.
Ammonium fluoride fire potential
Not flammable or combustible.
Source: Hazardous Substances Data Bank (HSDB)
10 · Handling and storage
Ammonium fluoride storage and handling
Ammonium fluoride safe storage
Separated from incompatible materials and food and feedstuffs. See Chemical Dangers. Dry. Well closed.
Source: ILO-WHO International Chemical Safety Cards (ICSCs)
Ammonium fluoride storage conditions
May be stored in iron vessels.
Source: Hazardous Substances Data Bank (HSDB)
Ammonium fluoride incompatible materials
reacts with acids to produce hydrogen fluoride. Reacts with alkalies, soluble calcium salts to produce ammonia gas.
Source: Hazardous Substances Data Bank (HSDB)
Ammonium fluoride reactivity
Ammonium fluoride reacts with water to form hydrofluoric acid, a source of fluoride ions. Unlike other halide ions, the fluoride ion is quite reactive, acting as a weak base and participating in some unique reactions. In particular, fluorides react strongly with compounds containing calcium, magnesium, or silicon ions, which means that solutions containing soluble fluorides are corrosive to both living tissue and glass. Hydrofluoric acid can cause severe chemical burns and is one of the few materials that can etch glass. It is also a toxic gas in its anhydrous form.
Source: CAMEO Chemicals
Planning storage for a mix of chemicals? Check Ammonium fluoride in the storage compatibility matrix →
11 · Transport
Ammonium fluoride UN number and transport classification
Transport classification is a separate system from the GHS classification above. It decides how a package is marked and how a load may be carried; it does not follow from the workplace label, and the workplace label does not follow from it. The entries below are linked by CAS number, never by name.
Ammonium fluoride under UN 2505 — shipping name, class and packing group
Europe · ADR 2025, Table A
| Proper shipping name (3.1.2) | Class | Classification code | PG | Labels (column 5) |
|---|---|---|---|---|
| AMMONIUM FLUORIDE | 6.1 | T5 | III | |
Source: ADR 2025, Table A of Chapter 3.2 · ECE/TRANS/352 Vol. I (UNECE). Class 6.1 is “Toxic substances” (ADR 2.1.1.1).
United States · 49 CFR 172.101 Hazardous Materials Table
| Proper shipping name (column 2) | Class or division | PG | Labels (column 6) |
|---|---|---|---|
| Ammonium fluoride | 6.1 | III | |
Source: 49 CFR 172.101 Hazardous Materials Table · eCFR, revision 2026-08-03. Class 6.1 is “Poisonous materials” (49 CFR 173.2).
12 · Questions
Ammonium fluoride — frequently asked questions
What is the CAS number of Ammonium fluoride?
The CAS number of Ammonium fluoride is 12125-01-8. Its EC number is 235-185-9.
What is the chemical formula of Ammonium fluoride?
The molecular formula of Ammonium fluoride is FH4N and its molecular weight is 37.037 g/mol.
What does a Ammonium fluoride label have to show?
Under CLP Annex VI the label for Ammonium fluoride carries the pictogram Skull and crossbones and the signal word is Danger.
Is Ammonium fluoride flammable?
CLP Annex VI assigns Ammonium fluoride no flammability hazard class. That is not a statement that it cannot burn: the harmonised list only records the hazards that were assessed for it.
Is Ammonium fluoride a carcinogen?
CLP Annex VI records no harmonised carcinogenicity classification for Ammonium fluoride. Annex VI is a list of agreed classifications, not a list of substances found safe, so this is an absence of a classification rather than a clean bill of health.
What is the exposure limit for Ammonium fluoride?
The US occupational exposure limit reported for Ammonium fluoride is 2.5 [mg/m3], as F (Haz-Map, Information on Hazardous Chemicals and Occupational Diseases). Limits differ by country: the EU sets its own indicative and binding values, and the figure that applies at a given workplace is the one in the local regulation.
What is the boiling point of Ammonium fluoride?
The boiling point reported for Ammonium fluoride is 100 °C (212 °F), at 760 mmHg (CAMEO).
What is the melting point of Ammonium fluoride?
The melting point reported for Ammonium fluoride is 238 °C (460.4 °F) (HSDB).
How should Ammonium fluoride be stored?
May be stored in iron vessels. (Hazardous Substances Data Bank (HSDB))
Nearby
Substances next to Ammonium fluoride
Keep going: substances starting with A, or search the whole database by name, CAS number, pictogram or signal word.