Substance profile
Sulfuryl fluoride
Sulfuryl fluoride is a colorless gas and is odorless.
01 · Identification
What Sulfuryl fluoride is
Sulfuryl fluoride is a colorless gas and is odorless. Its molecular formula is F2O2S and its molecular weight is 102.06 g/mol. It boils at -55.4 °C, melts at -136 °C.
Under the GHS it carries the signal word Danger. It is classed as corrosives.
02 · Identifiers
Sulfuryl fluoride identifiers and molecular data
Sulfuryl fluoride CAS number and EC number
Sulfuryl fluoride molecular formula and molecular weight
Other names for Sulfuryl fluoride
- sulphuryl difluoride
03 · GHS classification
Sulfuryl fluoride hazard classification
Harmonised classification under CLP Annex VI. This is the legally binding classification in the EU; other jurisdictions may differ.
Sulfuryl fluoride pictograms and signal word
Sulfuryl fluoride hazard class and category
| Hazard class | Category | From code | Pictogram |
|---|---|---|---|
| Acute toxicity - inhalation GHS chapter 3.1 | Category 3 | H331 | GHS06 |
| Specific target organ toxicity - repeated exposure GHS chapter 3.9 | Category 2 | H373 | GHS08 |
| Hazardous to the aquatic environment - acute GHS chapter 4.1 | Category 1 | H400 | GHS09 |
Sulfuryl fluoride hazard statements (H-codes)
| Code | Hazard statement |
|---|---|
| H331 | Toxic if inhaled. |
| H373 | May cause damage to organs <or state all organs affected, if known> through prolonged or repeated exposure <state route of exposure if it is conclusively proven that no other routes of exposure cause the hazard>. |
| H400 | Very toxic to aquatic life. |
This page lists only the codes assigned to Sulfuryl 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 Sulfuryl 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 Sulfuryl 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
Sulfuryl fluoride precautionary statements
CLP Annex VI assigns 9 precautionary statements to Sulfuryl 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.
Disposal
What has to happen to the contents and the empty container.
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
Sulfuryl 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 | сулфурилдифлуорид |
| Spanish español | Difluoruro de sulfurilo |
| Czech čeština | difluorid sulfurylu |
| Danish dansk | sulfuryldifluorid |
| German Deutsch | Sulfuryldifluorid |
| Estonian eesti | sulfurüüldifluoriid |
| Greek ελληνικά | σουλφουρυλοδιφθορίδιο |
| English English | sulphuryl difluoride |
| French français | difluorure de sulfuryle |
| Croatian hrvatski | sulfuril difluorid |
| Italian italiano | difluoruro di solforile |
| Latvian latviešu | sulfurildifluorīds |
| Lithuanian lietuvių | sulfurildifluoridas |
| Hungarian magyar | szulfuril-difluorid |
| Maltese Malti | difluworur tas-sulfuril |
| Dutch Nederlands | sulfuryldifluoride |
| Polish polski | difluorek sulfurylu fluorek sulfonylufluorek sulfurylu |
| Portuguese português | difluoreto de sulfurilo |
| Romanian română | difluorură de sulfuril |
| Slovak slovenčina | difluorid sulfurylu |
| Slovenian slovenščina | sulfuril difluorid |
| Finnish suomi | sulfuryylidifluoridi |
| Swedish svenska | sulfuryldifluorid |
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
Sulfuryl fluoride GHS label elements
Everything CLP Annex VI fixes for Sulfuryl fluoride, laid out the way it appears on a label. The greyed lines are the parts only the supplier can fill in.
Danger
Sulfuryl fluoride
- Toxic if inhaled.
- May cause damage to organs <or state all organs affected, if known> through prolonged or repeated exposure <state route of exposure if it is conclusively proven that no other routes of exposure cause the hazard>.
- Very toxic to aquatic life.
- 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.
- Avoid release to the environment.
- IF INHALED:
- Immediately call a POISON CENTER/doctor/…
- Get medical advice/attention if you feel unwell.
- Collect spillage.
- Dispose of contents/container to …
Supplier name, address and telephone number· Product identifier·Nominal quantity
Need this as an actual label? Open Sulfuryl fluoride in the GHS label constructor →
07 · Health hazards
Sulfuryl fluoride health hazards and exposure limits
Sulfuryl fluoride hazard summary
Concentrations inside fumigated structures are as high as 4000 to 40,000 ppm. Inhalation exposure may cause pulmonary edema. [ACGIH] Because sulfuryl fluoride is heavier than air, workers who re-enter a treated area are at risk for fatal hypoxia. Muscle twitching and seizures have been reported after acute poisoning. [EPA Pesticides, p. 161] Possible frostbite from contact with liquid; [NIOSH] The exact toxic mechanism is not known, but increased fluoride ion concentrations have been found in poisoned victims. Systemic fluorosis may result from sulfuryl fluoride poisoning. Fluoride can cause hypocalcemia and hyperkalemia with secondary arrhythmias and central nervous effects including agitation, tetany, and seizures. [AHLS, p. 266-7] This gas has no warning properties, but chloropicrin is often added. After chronic inhalation studies, animals have evidence of liver injury. [HSDB] See FLUORIDES.
Source: Haz-Map, Information on Hazardous Chemicals and Occupational Diseases
Sulfuryl fluoride carcinogenicity classification
Cancer Classification: Not Likely to be Carcinogenic to Humans
Source: Hazardous Substances Data Bank (HSDB)
An IARC group and a CLP classification answer different questions. IARC judges whether the evidence for cancer in humans is strong enough; CLP Annex VI is the legally binding EU classification. A substance can carry one and not the other.
Sulfuryl fluoride occupational exposure limits
| Limit | Value | Source |
|---|---|---|
| PEL | 5.0 [ppm] | Haz-Map, Information on Hazardous Chemicals and Occupational Diseases |
| PEL | 5 ppm (20 mg/m³) | Occupational Safety and Health Administration (OSHA) |
| PEL | TWA 5 ppm (20 mg/m3) See Appendix G | The National Institute for Occupational Safety and Health (NIOSH) |
| REL | 5 ppm (20 mg/m³) | Occupational Safety and Health Administration (OSHA) |
| REL | 10 ppm (40 mg/m³) | Occupational Safety and Health Administration (OSHA) |
| REL | TWA 5 ppm (20 mg/m3) ST 10 ppm (40 mg/m3) | The National Institute for Occupational Safety and Health (NIOSH) |
| IDLH | 200 ppm (NIOSH, 2024) | CAMEO Chemicals |
| IDLH | 200.0 [ppm] | Haz-Map, Information on Hazardous Chemicals and Occupational Diseases |
| IDLH | Excerpts from Documentation for IDLHs: Other animal data: It has been reported that less than 5% mortality resulted from exposure for 3 hours to 1,000 ppm [Taxay 1966]. | 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
Sulfuryl 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.
Sulfuryl fluoride boiling point
| Property | Value | Conditions | Source |
|---|---|---|---|
| Boiling point | -55.38 °C (-67.7 °F) | HSDB | |
| -55.56 °C (-68 °F) | NIOSH | ||
| -55.56 °C (-68 °F) | at 760 mmHg | CAMEO |
Sulfuryl fluoride melting point
| Property | Value | Conditions | Source |
|---|---|---|---|
| Melting point | -135.82 °C (-212.5 °F) | HSDB | |
| -135.56 °C (-212 °F) | NIOSH |
Sulfuryl fluoride density
| Property | Value | Conditions | Source |
|---|---|---|---|
| Density | 0.0037 g/cm³ | HSDB | |
| 0.0042 g/cm³ | HSDB |
Sulfuryl fluoride solubility
| Property | Value | Conditions | Source |
|---|---|---|---|
| Solubility | 4-5 ml gas/100 ml water; 24-27 ml gas/100 ml alc; 136-138 ml gas/100 ml carbon tetrachloride; 210-220 ml gas/100 ml toluene | HSDB | |
| SLIGHTLY SOL IN ALKALIS | HSDB | ||
| MISCIBLE WITH METHYL BROMIDE; SPARINGLY SOL IN MOST ORG SOLVENTS | HSDB |
Sulfuryl fluoride vapor pressure
| Property | Value | Conditions | Source |
|---|---|---|---|
| Vapor pressure | 12010 mmHg | at 21.11 °C | NIOSH |
| 12750 mmHg | at 21 °C | HSDB |
Sulfuryl fluoride lower explosive limit (LEL)
| Property | Value | Conditions | Source |
|---|---|---|---|
| Lower explosive limit (LEL) | Nonflammable Gas | NIOSH |
Sulfuryl fluoride vapor density
| Property | Value | Conditions | Source |
|---|---|---|---|
| Vapor density | 3.5 (air = 1) | HSDB | |
| 3.72 (air = 1) | CAMEO |
Sulfuryl fluoride critical temperature and pressure
| Property | Value | Conditions | Source |
|---|---|---|---|
| Critical temperature and pressure | 20 °C (68 °F) | HSDB |
Sulfuryl fluoride corrosivity
| Property | Value | Conditions | Source |
|---|---|---|---|
| Corrosivity | NON-CORROSIVE | HSDB |
Values compiled from PubChem Laboratory Chemical Safety Summary. Temperatures converted to Fahrenheit for reference.
09 · Fire and explosion
Sulfuryl 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.
Sulfuryl fluoride fire potential
Noncombustible
Source: Hazardous Substances Data Bank (HSDB)
10 · Handling and storage
Sulfuryl fluoride storage and handling
Sulfuryl fluoride safe storage
Fireproof if in building. Cool. Ventilation along the floor.
Source: ILO-WHO International Chemical Safety Cards (ICSCs)
Sulfuryl fluoride storage conditions
MAY BE STORED IN COMPRESSED FORM IN STEEL CYLINDERS OR IN GASOMETER OVER SULFURIC ACID.
Source: Hazardous Substances Data Bank (HSDB)
Sulfuryl fluoride incompatible materials
Can react with water, steam.
Source: Hazardous Substances Data Bank (HSDB)
Sulfuryl fluoride reactivity
SULFURYL FLUORIDE is a gas which is unaffected by water at temperatures up to 300F, but is slowly hydrolyzed by solutions of strong bases (Adv. Inorganic Chemistry, Cotton and Wilkinson, 1972, p. 455). The products of hydrolysis are hydrofluoric acid and sulfuric acid and it is soluble in ethanol, toluene and carbon tetrachloride (Pesticide Profiles, Kamrin, ed., 1997, p. 548). It is much less reactive than sulfuryl chloride (Adv. Inorganic Chemistry, Cotton and Wilkinson, 1972, p. 455).
Source: CAMEO Chemicals
Planning storage for a mix of chemicals? Check Sulfuryl fluoride in the storage compatibility matrix →
11 · Questions
Sulfuryl fluoride — frequently asked questions
What is the CAS number of Sulfuryl fluoride?
The CAS number of Sulfuryl fluoride is 2699-79-8. Its EC number is 220-281-5.
What is the chemical formula of Sulfuryl fluoride?
The molecular formula of Sulfuryl fluoride is F2O2S and its molecular weight is 102.06 g/mol.
What does a Sulfuryl fluoride label have to show?
Under CLP Annex VI the label for Sulfuryl fluoride carries the pictograms Gas cylinder, Skull and crossbones, Health hazard and Environment and the signal word is Danger.
Is Sulfuryl fluoride flammable?
CLP Annex VI assigns Sulfuryl 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 Sulfuryl fluoride a carcinogen?
CLP Annex VI records no harmonised carcinogenicity classification for Sulfuryl 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 Sulfuryl fluoride?
The US occupational exposure limit reported for Sulfuryl fluoride is 5.0 [ppm] (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 Sulfuryl fluoride?
The boiling point reported for Sulfuryl fluoride is -55.38 °C (-67.7 °F) (HSDB).
What is the melting point of Sulfuryl fluoride?
The melting point reported for Sulfuryl fluoride is -135.82 °C (-212.5 °F) (HSDB).
How should Sulfuryl fluoride be stored?
MAY BE STORED IN COMPRESSED FORM IN STEEL CYLINDERS OR IN GASOMETER OVER SULFURIC ACID. (Hazardous Substances Data Bank (HSDB))
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