Substance profile
Ammonium bifluoride
Ammonium bifluoride is rhombic or tetragonal crystals and is odorless.
01 · Identification
What Ammonium bifluoride is
Ammonium bifluoride is rhombic or tetragonal crystals and is odorless. Its molecular formula is F2H5N and its molecular weight is 57.044 g/mol. It boils at 240 °C, melts at 126 °C.
Under the GHS it carries the signal word Danger. It is classed as corrosives.
02 · Identifiers
Ammonium bifluoride identifiers and molecular data
Ammonium bifluoride CAS number and EC number
Ammonium bifluoride molecular formula and molecular weight
Other names for Ammonium bifluoride
- ammonium hydrogen difluoride
03 · GHS classification
Ammonium bifluoride hazard classification
Harmonised classification under CLP Annex VI. This is the legally binding classification in the EU; other jurisdictions may differ.
Ammonium bifluoride pictograms and signal word
Ammonium bifluoride hazard class and category
| Hazard class | Category | From code | Pictogram |
|---|---|---|---|
| Acute toxicity - oral GHS chapter 3.1 | Category 3 | H301 | GHS06 |
| Skin corrosion/irritation GHS chapter 3.2 | Category 1A or 1B or 1C | H314 | GHS05 |
Where two values are shown with “or”, the hazard statement is shared by more than one category or by more than one class, and the code alone does not say which. H272, for example, belongs to oxidising liquids and to oxidising solids — the physical state decides. The binding answer for a specific entry is in the CLP Annex VI table itself.
Ammonium bifluoride hazard statements (H-codes)
| Code | Hazard statement |
|---|---|
| H301 | Toxic if swallowed. |
| H314 | Causes severe skin burns and eye damage. |
This page lists only the codes assigned to Ammonium bifluoride. 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 bifluoride
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 bifluoride 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 bifluoride precautionary statements
CLP Annex VI assigns 7 precautionary statements to Ammonium bifluoride. 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 bifluoride 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 бифлуорид амониев хидрогендифлуорид |
| Spanish español | Bifluoruro de amonio difluoruro de hidrógeno y amonio |
| Czech čeština | hydrogendifluorid amonný |
| Danish dansk | ammoniumbiflourid ammoniumhydrogenfluorid |
| German Deutsch | Ammoniumbifluorid Ammoniumhydrogendifluorid |
| Estonian eesti | ammooniumvesinikfluoriid ammooniumvesinikdifluoriid |
| Greek ελληνικά | διφθοριούχο αμμώνιο όξινο διφθοριούχο αμμώνιο |
| English English | ammonium bifluoride ammonium hydrogen difluoride |
| French français | bifluorure d'ammonium hydrogénodifluorure d'ammonium |
| Croatian hrvatski | amonijev bifluorid amonijev vodikov difluorid |
| Italian italiano | bifluoruro d'ammonio ammonio bifluoruro |
| Latvian latviešu | amonija bifluorīds amonija hidrogēndifluorīds |
| Lithuanian lietuvių | amonio bifluoridas amonio vandenilio difluoridas |
| Hungarian magyar | ammónium-bifluorid ammónium-hidrogén-difluorid |
| Maltese Malti | bifluworur tal-ammonju difluworur tal-idroġenu tal-ammonju |
| Dutch Nederlands | ammoniumbifluoride ammoniumwaterstofdifluoride |
| Polish polski | fluorek amonu-fluorowodór(1/1) wodorofluorek amonukwaśny fluorek amonu |
| Portuguese português | bifluoreto de amónio hidrogenodifluoreto de amónio |
| Romanian română | difluorură de amoniu difluorură acidă de amoniu |
| Slovak slovenčina | difluorid monoamónny hydrogendifluorid amónny |
| Slovenian slovenščina | amonijev bifluorid amonijev hidrogen difluorid |
| Finnish suomi | ammoniumbifluoridi ammoniumvetydifluoridi |
| Swedish svenska | ammoniumbifluorid ammoniumvätedifluorid |
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 bifluoride GHS label elements
Everything CLP Annex VI fixes for Ammonium bifluoride, laid out the way it appears on a label. The greyed lines are the parts only the supplier can fill in.
Danger
Ammonium bifluoride
- Toxic if swallowed.
- Causes severe skin burns and eye damage.
- Do not breathe dust/fume/gas/mist/vapours/spray.
- Do not eat, drink or smoke when using this product.
- Wear protective gloves/protective clothing/eye protection/face protection/hearing protection/…
- IF SWALLOWED:
- Immediately call a POISON CENTER/doctor/…
- Rinse mouth.
- Do NOT induce vomiting.
Supplier name, address and telephone number· Product identifier·Nominal quantity
Need this as an actual label? Open Ammonium bifluoride in the GHS label constructor →
07 · Health hazards
Ammonium bifluoride health hazards and exposure limits
Ammonium bifluoride hazard summary
Produces weak hydrofluoric acid when dissolved in water; Corrosive; [CAMEO] Decomposes when heated above 240 deg C forming toxic and corrosive hydrogen fluoride gas; [CHEMINFO] Repeated, heavy exposures could cause fluorosis. [NJ-HSFS] See FLUORIDES.
Source: Haz-Map, Information on Hazardous Chemicals and Occupational Diseases
Ammonium bifluoride occupational exposure limits
| Limit | Value | Source |
|---|---|---|
| PEL | 2.5 [mg/m3], as F | Haz-Map, Information on Hazardous Chemicals and Occupational Diseases |
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 bifluoride 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 bifluoride boiling point
| Property | Value | Conditions | Source |
|---|---|---|---|
| Boiling point | 240 °C (464 °F) | at 760 mmHg | DOE PAC |
| 240 °C (464 °F) | decomposes, decomposes | HSDB | |
| 239.5 °C (463.1 °F) | decomposes, at 760 mmHg | CAMEO |
Ammonium bifluoride melting point
| Property | Value | Conditions | Source |
|---|---|---|---|
| Melting point | 125.6 °C (258.1 °F) | HSDB | |
| 125.56 °C (258 °F) | CAMEO | ||
| 126 °C (258.8 °F) | DOE PAC |
Ammonium bifluoride density
| Property | Value | Conditions | Source |
|---|---|---|---|
| Density | 1.5 g/cm³ | HSDB | |
| 1.5 g/cm³ | at 20 °C | CAMEO | |
| 1.5 g/cm³ | at 25 °C | DOE PAC |
Ammonium bifluoride solubility
| Property | Value | Conditions | Source |
|---|---|---|---|
| Solubility | Solubility in 90% ethanol = 1.73X10+5 mg/L | HSDB | |
| In water, 6.02X10+5 mg/L at 20 °C | at 20 °C | HSDB |
Ammonium bifluoride corrosivity
| Property | Value | Conditions | Source |
|---|---|---|---|
| Corrosivity | Will etch glass | HSDB | |
| In presence of moisture will corrode glass, cement, and most metals. | HSDB |
Values compiled from PubChem Laboratory Chemical Safety Summary. Temperatures converted to Fahrenheit for reference.
09 · Handling and storage
Ammonium bifluoride storage and handling
Ammonium bifluoride storage conditions
Solution /USP topical fluoride solution/ should be stored in Plax (plastic), paraffin lined, or pyrex bottles.
Source: Hazardous Substances Data Bank (HSDB)
Ammonium bifluoride incompatible materials
... Reacts with silicon containing materials like glass or ceramics at room temperature (formation of SiF4). It also reacts with concentrated acids (formation of HF) and concentrated alkaline solutions (formation of NH3).
Source: Hazardous Substances Data Bank (HSDB)
Ammonium bifluoride reactivity
AMMONIUM BIFLUORIDE reacts violently with bases. In presence of moisture will corrode glass, cement, and most metals. Flammable hydrogen gas may collect in enclosed spaces. Do not use steel, nickel, or aluminum containers (USCG, 1999).
Source: CAMEO Chemicals
Planning storage for a mix of chemicals? Check Ammonium bifluoride in the storage compatibility matrix →
10 · Questions
Ammonium bifluoride — frequently asked questions
What is the CAS number of Ammonium bifluoride?
The CAS number of Ammonium bifluoride is 1341-49-7. Its EC number is 215-676-4.
What is the chemical formula of Ammonium bifluoride?
The molecular formula of Ammonium bifluoride is F2H5N and its molecular weight is 57.044 g/mol.
What does a Ammonium bifluoride label have to show?
Under CLP Annex VI the label for Ammonium bifluoride carries the pictograms Skull and crossbones and Corrosion and the signal word is Danger.
Is Ammonium bifluoride flammable?
CLP Annex VI assigns Ammonium bifluoride 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 bifluoride a carcinogen?
CLP Annex VI records no harmonised carcinogenicity classification for Ammonium bifluoride. 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 bifluoride?
The US occupational exposure limit reported for Ammonium bifluoride 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 bifluoride?
The boiling point reported for Ammonium bifluoride is 240 °C (464 °F), at 760 mmHg (DOE PAC).
What is the melting point of Ammonium bifluoride?
The melting point reported for Ammonium bifluoride is 125.6 °C (258.1 °F) (HSDB).
How should Ammonium bifluoride be stored?
Solution /USP topical fluoride solution/ should be stored in Plax (plastic), paraffin lined, or pyrex bottles. (Hazardous Substances Data Bank (HSDB))
Nearby
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