Substance profile
Sulfuryl chloride
Sulfuryl chloride is colorless, mobile liquid with a very pungent odor.
01 · Identification
What Sulfuryl chloride is
Sulfuryl chloride is colorless, mobile liquid with a very pungent odor. Its molecular formula is Cl2O2S and its molecular weight is 134.97 g/mol. It boils at 69.3 °C, melts at -54.1 °C.
Under the GHS it carries the signal word Danger. It is classed as corrosives.
02 · Identifiers
Sulfuryl chloride identifiers and molecular data
Sulfuryl chloride CAS number and EC number
Sulfuryl chloride molecular formula and molecular weight
Other names for Sulfuryl chloride
- sulphuryl chloride
03 · GHS classification
Sulfuryl chloride hazard classification
Harmonised classification under CLP Annex VI. This is the legally binding classification in the EU; other jurisdictions may differ.
Sulfuryl chloride pictograms and signal word
Sulfuryl chloride hazard class and category
| Hazard class | Category | From code | Pictogram |
|---|---|---|---|
| Skin corrosion/irritation GHS chapter 3.2 | Category 1A or 1B or 1C | H314 | GHS05 |
| Specific target organ toxicity - single exposure GHS chapter 3.8 | Category 3 | H335 | GHS07 |
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.
Sulfuryl chloride hazard statements (H-codes)
| Code | Hazard statement |
|---|---|
| H335 | May cause respiratory irritation. |
| H314 | Causes severe skin burns and eye damage. |
Sulfuryl chloride supplemental EU statements (EUH)
| Code | Statement |
|---|---|
| EUH014 | Reacts violently with water. |
This page lists only the codes assigned to Sulfuryl chloride. 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 chloride
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 chloride 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 chloride precautionary statements
CLP Annex VI assigns 5 precautionary statements to Sulfuryl chloride. 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
Sulfuryl chloride 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 | сулфурилхлорид |
| Spanish español | Cloruro de sulfurilo |
| Czech čeština | chlorid sulfurylu |
| Danish dansk | sulfurylchlorid |
| German Deutsch | Sulfurylchlorid |
| Estonian eesti | sulfurüülkloriid |
| Greek ελληνικά | σουλφουρυλοχλωρίδιο |
| English English | sulphuryl chloride |
| French français | chlorure de sulfuryle |
| Croatian hrvatski | sulfuril-klorid |
| Italian italiano | cloruro di solforile |
| Latvian latviešu | sulfurilhlorīds |
| Lithuanian lietuvių | sulfurilchloridas |
| Hungarian magyar | szulfuril-diklorid |
| Maltese Malti | klorur tas-sulfuril |
| Dutch Nederlands | sulfurylchloride |
| Polish polski | dichlorek sulfonylu dichlorek sulfuryluchlorek sulfurylu |
| Portuguese português | cloreto de sulfurilo |
| Romanian română | clorură de sulfuril |
| Slovak slovenčina | chlorid sulfurylu |
| Slovenian slovenščina | sulfuril klorid |
| Finnish suomi | sulfuryylikloridi |
| Swedish svenska | sulfurylklorid |
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 chloride GHS label elements
Everything CLP Annex VI fixes for Sulfuryl chloride, laid out the way it appears on a label. The greyed lines are the parts only the supplier can fill in.
Danger
Sulfuryl chloride
- May cause respiratory irritation.
- Causes severe skin burns and eye damage.
- Reacts violently with water.
- Do not breathe dust/fume/gas/mist/vapours/spray.
- Wear protective gloves/protective clothing/eye protection/face protection/hearing protection/…
- IF SWALLOWED:
- Immediately call a POISON CENTER/doctor/…
- Do NOT induce vomiting.
Supplier name, address and telephone number· Product identifier·Nominal quantity
Need this as an actual label? Open Sulfuryl chloride in the GHS label constructor →
07 · Health hazards
Sulfuryl chloride health hazards and exposure limits
Sulfuryl chloride hazard summary
Corrosive to skin; [Quick CPC] High inhalation exposure may induce pneumonitis and pulmonary edema; [ICSC] Sulfuryl chloride release HCl when spilled in water; [ERG 2016] Even the vapors are corrosive to human skin and mucous membranes. Slowly decomposed by water producing sulfuric and hydrochloric acids; [Merck Index] Reacts violently with water and is slowly hydrolyzed by moist air producing chlorosulfonic, sulfuric, and hydrochloric acids; Reports of delayed onset pulmonary edema in humans following inhalation exposure; [Reference #1] A lachrymator; [CHEMINFO]
Source: Haz-Map, Information on Hazardous Chemicals and Occupational Diseases
08 · Physical and chemical properties
Sulfuryl chloride 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 chloride boiling point
| Property | Value | Conditions | Source |
|---|---|---|---|
| Boiling point | 69.3 °C (156.7 °F) | HSDB | |
| 69.11 °C (156.4 °F) | at 760 mmHg | CAMEO | |
| 69.1 °C (156.4 °F) | ICSC |
Sulfuryl chloride melting point
| Property | Value | Conditions | Source |
|---|---|---|---|
| Melting point | -54.1 °C (-65.4 °F) | HSDB |
Sulfuryl chloride density
| Property | Value | Conditions | Source |
|---|---|---|---|
| Density | 1.67 g/cm³ | ICSC | |
| 1.6674 g/cm³ | at 20 °C | HSDB | |
| 1.67 g/cm³ | at 20 °C | CAMEO |
Sulfuryl chloride solubility
| Property | Value | Conditions | Source |
|---|---|---|---|
| Solubility | Miscible with benzene, toluene, ether, glacial acetic acid, and other org solvents | HSDB | |
| Solubility in water: reaction | ICSC |
Sulfuryl chloride vapor pressure
| Property | Value | Conditions | Source |
|---|---|---|---|
| Vapor pressure | 111.009 mmHg | at 20 °C | ICSC |
| 100 mmHg | at 17.8 °C | HSDB |
Sulfuryl chloride autoignition temperature
| Property | Value | Conditions | Source |
|---|---|---|---|
| Autoignition temperature | Not flammable (USCG, 1999) | CAMEO |
Sulfuryl chloride vapor density
| Property | Value | Conditions | Source |
|---|---|---|---|
| Vapor density | 4.6 (air = 1) | HSDB | |
| 4.65 (air = 1) | ICSC |
Sulfuryl chloride critical temperature and pressure
| Property | Value | Conditions | Source |
|---|---|---|---|
| Critical temperature and pressure | 272.5 °C (522.5 °F) | range, midpoint shown | HSDB |
Values compiled from PubChem Laboratory Chemical Safety Summary. Temperatures converted to Fahrenheit for reference.
09 · Fire and explosion
Sulfuryl chloride 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 chloride fire potential
Not combustible ...
Source: Hazardous Substances Data Bank (HSDB)
10 · Handling and storage
Sulfuryl chloride storage and handling
Sulfuryl chloride safe storage
Separated from strong bases. Dry.
Source: ILO-WHO International Chemical Safety Cards (ICSCs)
Sulfuryl chloride storage conditions
With caution, dilute alkali can be used to store sulfuryl chloride but some corrosion may occur; lead, nickel, glass, Teflon, 310 stainless steel, or baked phenolics (tested for this service) are preferred.
Source: Hazardous Substances Data Bank (HSDB)
Sulfuryl chloride incompatible materials
Sulfuryl chloride reacts with water to form hydrochloric acid and sulfuric acid. ...
Source: Hazardous Substances Data Bank (HSDB)
Sulfuryl chloride reactivity
SULFURYL CHLORIDE reacts exothermically with water. Incompatible with strong oxidizing agents, alcohols, amines. Reacts violently with bases. Attacks many metals. Can react explosively with lead dioxide [Mellor 10:676 1946-47]. May react vigorously or explosively if mixed with diisopropyl ether or other ethers in the presence of trace amounts of metal salts [J. Haz. Mat., 1981, 4, 291].
Source: CAMEO Chemicals
Planning storage for a mix of chemicals? Check Sulfuryl chloride in the storage compatibility matrix →
11 · Transport
Sulfuryl chloride 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.
Sulfuryl chloride under UN 1834 — shipping name, class and packing group
Europe · ADR 2025, Table A
| Proper shipping name (3.1.2) | Class | Classification code | PG | Labels (column 5) |
|---|---|---|---|---|
| SULPHURYL CHLORIDE | 6.1 | TC3 | I | |
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) |
|---|---|---|---|
| Sulfuryl chloride | 6.1 | I | |
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
Sulfuryl chloride — frequently asked questions
What is the CAS number of Sulfuryl chloride?
The CAS number of Sulfuryl chloride is 7791-25-5. Its EC number is 232-245-6.
What is the chemical formula of Sulfuryl chloride?
The molecular formula of Sulfuryl chloride is Cl2O2S and its molecular weight is 134.97 g/mol.
What does a Sulfuryl chloride label have to show?
Under CLP Annex VI the label for Sulfuryl chloride carries the pictograms Corrosion and Exclamation mark and the signal word is Danger.
Is Sulfuryl chloride flammable?
CLP Annex VI assigns Sulfuryl chloride 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 chloride a carcinogen?
CLP Annex VI records no harmonised carcinogenicity classification for Sulfuryl chloride. 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 boiling point of Sulfuryl chloride?
The boiling point reported for Sulfuryl chloride is 69.3 °C (156.7 °F) (HSDB).
What is the melting point of Sulfuryl chloride?
The melting point reported for Sulfuryl chloride is -54.1 °C (-65.4 °F) (HSDB).
How should Sulfuryl chloride be stored?
With caution, dilute alkali can be used to store sulfuryl chloride but some corrosion may occur; lead, nickel, glass, Teflon, 310 stainless steel, or baked phenolics (tested for this service) are preferred. (Hazardous Substances Data Bank (HSDB))
Nearby
Substances next to Sulfuryl chloride
Keep going: substances starting with S, or search the whole database by name, CAS number, pictogram or signal word.