Substance profile
Sodium hydrogen difluoride
Sodium hydrogen difluoride is colorless, or white crystalline powder, rhombohedral.
01 · Identification
What Sodium hydrogen difluoride is
Sodium hydrogen difluoride is colorless, or white crystalline powder, rhombohedral.
Under the GHS it carries the signal word Danger. It is classed as corrosives.
02 · Identifiers
Sodium hydrogen difluoride identifiers and molecular data
Sodium hydrogen difluoride CAS number and EC number
Sodium hydrogen difluoride molecular formula and molecular weight
Other names for Sodium hydrogen difluoride
- sodium bifluoride
03 · GHS classification
Sodium hydrogen difluoride hazard classification
Harmonised classification under CLP Annex VI. This is the legally binding classification in the EU; other jurisdictions may differ.
Sodium hydrogen difluoride pictograms and signal word
Sodium hydrogen difluoride 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.
Sodium hydrogen difluoride 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 Sodium hydrogen difluoride. 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 Sodium hydrogen difluoride
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 Sodium hydrogen… 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
Sodium hydrogen difluoride precautionary statements
CLP Annex VI assigns 7 precautionary statements to Sodium hydrogen difluoride. 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
Sodium hydrogen difluoride 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 | натриев бифлуорид натриев хидрогендифлуорид |
| Spanish español | Bifluoruro de sodio difluoruro de hidrógeno y sodio |
| Czech čeština | hydrogendifluorid sodný |
| Danish dansk | natriumbifluorid natriumhydrogenfluorid |
| German Deutsch | Natriumbifluorid Natriumhydrogendifluorid |
| Estonian eesti | naatriumvesinikfluoriid naatriumvesinikdifluoriid |
| Greek ελληνικά | διφθοριούχο νάτριο όξινο διφθοριούχο νάτριο |
| English English | sodium bifluoride sodium hydrogen difluoride |
| French français | bifluorure de sodium hydrogénodifluorure de sodium |
| Croatian hrvatski | natrijev bifluorid natrijev vodikov difluorid |
| Italian italiano | bifluoruro di sodio sodio bifluoruro |
| Latvian latviešu | nātrija bifluorīds nātrija hidrogēndifluorīds |
| Lithuanian lietuvių | natrio bifluoridas natrio vandenilio difluoridas |
| Hungarian magyar | nátrium-bifluorid nátrium-hidrogén-difluorid |
| Maltese Malti | bifluworur tas-sodju difluworur tal-idroġenu tas-sodju |
| Dutch Nederlands | natriumbifluoride natriumwaterstofdifluoride |
| Polish polski | fluorek sodu-fluorowodór(1/1) wodorofluorek sodukwaśny fluorek sodu |
| Portuguese português | bifluoreto de sódio hidrogenodifluoreto de sódio |
| Romanian română | difluorură de sodiu difluorură acidă de sodiu |
| Slovak slovenčina | difluorid monosodný hydrogendifluorid sodný |
| Slovenian slovenščina | natrijev bifluorid natrijev hidrogen difluorid |
| Finnish suomi | natriumbifluoridi natriumvetydifluoridi |
| Swedish svenska | natriumbifluorid natriumvätedifluorid |
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
Sodium hydrogen difluoride GHS label elements
Everything CLP Annex VI fixes for Sodium hydrogen difluoride, laid out the way it appears on a label. The greyed lines are the parts only the supplier can fill in.
Danger
Sodium hydrogen difluoride
- 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 Sodium hydrogen difluoride in the GHS label constructor →
07 · Health hazards
Sodium hydrogen difluoride health hazards and exposure limits
Sodium hydrogen difluoride hazard summary
A strong tissue irritant; Highly toxic; [Hawley] Reacts with water evolving heat and producing corrosive solution; May be corrosive to tissue; An eye and mucous membrane irritant; [CAMEO] May cause burns; [eChemPortal: ESIS] A corrosive substance that can cause injury to the skin, eyes, and respiratory tract; Inhalation may cause chemical pneumonitis; [MSDSonline] See FLUORIDES.
Source: Haz-Map, Information on Hazardous Chemicals and Occupational Diseases
Sodium hydrogen difluoride occupational exposure limits
| Limit | Value | Source |
|---|---|---|
| PEL | 2.5 [mg/m3], as F | Haz-Map, Information on Hazardous Chemicals and Occupational Diseases |
| IDLH | 500 mg/cu m /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
Sodium hydrogen difluoride 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.
Sodium hydrogen difluoride melting point
| Property | Value | Conditions | Source |
|---|---|---|---|
| Melting point | Decomposes in melting (USCG, 1999) | decomposes | CAMEO |
Sodium hydrogen difluoride density
| Property | Value | Conditions | Source |
|---|---|---|---|
| Density | 2.08 g/cm³ | HSDB | |
| 2.08 g/cm³ | at 20 °C | CAMEO | |
| 2.08 g/cm³ | at 25 °C | DOE PAC |
Sodium hydrogen difluoride solubility
| Property | Value | Conditions | Source |
|---|---|---|---|
| Solubility | SOL IN COLD & HOT WATER | HSDB |
Sodium hydrogen difluoride autoignition temperature
| Property | Value | Conditions | Source |
|---|---|---|---|
| Autoignition temperature | Not flammable (USCG, 1999) | CAMEO |
Values compiled from PubChem Laboratory Chemical Safety Summary. Temperatures converted to Fahrenheit for reference.
09 · Handling and storage
Sodium hydrogen difluoride storage and handling
Sodium hydrogen difluoride reactivity
Acidic salts, such as SODIUM BIFLUORIDE, are generally soluble in water. The resulting solutions contain moderate concentrations of hydrogen ions and have pH's of less than 7.0. They react as acids to neutralize bases. These neutralizations generate heat, but less or far less than is generated by neutralization of inorganic acids, inorganic oxoacids, and carboxylic acid. They usually do not react as either oxidizing agents or reducing agents but such behavior is not impossible. Many of these compounds catalyze organic reactions.
Source: CAMEO Chemicals
Planning storage for a mix of chemicals? Check Sodium hydrogen difluorid… in the storage compatibility matrix →
10 · Questions
Sodium hydrogen difluoride — frequently asked questions
What is the CAS number of Sodium hydrogen difluoride?
The CAS number of Sodium hydrogen difluoride is 1333-83-1. Its EC number is 215-608-3.
What does a Sodium hydrogen difluoride label have to show?
Under CLP Annex VI the label for Sodium hydrogen difluoride carries the pictograms Skull and crossbones and Corrosion and the signal word is Danger.
Is Sodium hydrogen difluoride flammable?
CLP Annex VI assigns Sodium hydrogen difluoride 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 Sodium hydrogen difluoride a carcinogen?
CLP Annex VI records no harmonised carcinogenicity classification for Sodium hydrogen difluoride. 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 Sodium hydrogen difluoride?
The US occupational exposure limit reported for Sodium hydrogen difluoride 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 melting point of Sodium hydrogen difluoride?
The melting point reported for Sodium hydrogen difluoride is Decomposes in melting (USCG, 1999), decomposes (CAMEO).
Nearby
Substances next to Sodium hydrogen difluoride
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