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7791-25-5

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Identification

Name
Sulfuryl chloride
CAS
7791-25-5
Synonyms
CLORSULFURON
Sulfuric oxychloride
Sulfur oxychloride
SULFURYL CHLORIDE
SULPHURYL CHLORIDE
SULPHURYL DICHLORIDE
SO2Cl2
Sulfonychloride
Sulfonyl chloride
sulfonylchloride
sulfonyldichloride
Sulfuric chloride
sulfuricdichloride
sulfuroxychloride(so2cl2)
Sulfurylchlorid
sulfurylchloride(so2cl2)
sulfuryldichloride
sulphuricaciddichloride
sulphuryl
Sulfuryl chloride solution
EINECS(EC#)
232-245-6
Molecular Formula
Cl2O2S
MDL Number
MFCD00011451
Molecular Weight
134.97
MOL File
7791-25-5.mol

Chemical Properties

Appearance
A colorless to light yellow fuming liquid. Pungent acrid odor.
Appearance
colourless or pale yellow liquid
Melting point 
-54.1 °C
mp 
-54.1 °C
Boiling point 
69.1 °C
bp 
69.1 °C
density 
1.667
vapor density 
4.7 (vs air)

vapor pressure 
100 mm Hg ( 17.8 °C)

refractive index 
n20/D 1.443(lit.)

Fp 
69.1°C
solubility 
Miscible with benzene, toluene, chloroform, ether, carbon tetrachloride and glacial acetic acid.
form 
Liquid
color 
Clear colorless to yellow
Specific Gravity
1.670 (20/20℃)
Stability:
Reacts violently with water. Incompatible with acids, alcohols, bases, metals, amines, moisture.
Water Solubility 
reacts
Sensitive 
Moisture Sensitive
Merck 
14,8980
Detection Methods
AT
CAS DataBase Reference
7791-25-5(CAS DataBase Reference)
NIST Chemistry Reference
Sulfuryl chloride(7791-25-5)
Storage Precautions
Moisture sensitive;Store under nitrogen
EPA Substance Registry System
7791-25-5(EPA Substance)

Safety Data

Hazard Codes 
C
Risk Statements 
R34:Causes burns.
R40:Limited evidence of a carcinogenic effect.
R14:Reacts violently with water.
R37:Irritating to the respiratory system.
Safety Statements 
S26:In case of contact with eyes, rinse immediately with plenty of water and seek medical advice .
S45:In case of accident or if you feel unwell, seek medical advice immediately (show label where possible) .
S36/37:Wear suitable protective clothing and gloves .
S36/37/39:Wear suitable protective clothing, gloves and eye/face protection .
RIDADR 
UN 2927 6.1/PG 2

WGK Germany 
2

RTECS 
WT4870000


3-10-21
TSCA 
Yes
HazardClass 
8
PackingGroup 
I
HS Code 
28121099
Safety Profile
A corrosive irritant to skin, eyes, and mucous membranes. Questionable carcinogen with experimental tumorigenic data. Can explode with Pb02. Will react with water or steam to produce heat and toxic and corrosive fumes. Incompatible with alkalies, diethyl ether, dimethyl sulfoxide,dinitrogen pentaoxide, lead dioxide, phosphorus. When heated to decomposition it emits highly toxic fumes of Cland SOx. See also SULFURIC ACID and HYDROCHLORIC ACID, which are formed upon hydrolysis.
Hazardous Substances Data
7791-25-5(Hazardous Substances Data)

Raw materials And Preparation Products

Hazard Information

General Description
A colorless fuming liquid with a pungent odor. Very toxic by inhalation. Corrosive to metals and tissue.
Reactivity Profile
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].
Health Hazard
Vapors cause severe irritation of eyes and respiratory system. Liquid burns eyes and skin. If ingested, can cause severe burns of mouth and stomach.
Potential Exposure
Sulfuryl chloride is used to make other chemicals, including chlorophenol and chlorothymol, disinfectants, pharmaceuticals, phosphate insecticides, heterocyclic herbicides, fungicides, dyestuffs, and some plastics; as a solvent and catalyst; as a chlorosulfonating agent in organic synthesis. Also used as a dehydrating agent, as cathode material and in lithium batteries; as a wool treatment to prevent shrinkage.
First aid
Move victim to fresh air. Call 911 or emergency medical service. Give artificial respiration if victim is not breathing. Do not use mouth-to-mouth method if victim ingested or inhaled the substance; give artificial respiration with the aid of a pocket mask equipped with a one-way valve or other proper respiratory medical device. Administer oxygen if breathing is difficult. Remove and isolate contaminated clothing and shoes. In case of contact with substance, immediately flush skin or eyes with running water for at least 20 minutes. For minor skin contact, avoid spreading material on unaffected skin. Removal of solidified molten material from skin requires medical assistance. Keep victim warm and quiet. Effects of exposure (inhalation, ingestion, or skin contact) to substance may be delayed. Ensure that medical personnel are aware of the material(s) involved and take precautions to protectthemselves. Medical observation is recommended for 24 to 48 hours after breathing overexposure, as pulmonary edema may be delayed. As first aid for pulmonary edema, a doctor or authorized paramedic may consider administering a drug or other inhalation therapy.
Fire Hazard
Behavior in Fire: Toxic and irritating gases are generated.
Shipping
UN1834 Sulfuryl chloride, Hazard Class: 6.1; Labels: 6.1-Poison Inhalation Hazard; 8-Corrosive material; Inhalation Hazard Zone A. STN: 4930260; Sulfuryl chloride.
Incompatibilities
Water and air reactive. When spilled in water, hydrogen chloride, sulfur dioxide and sulfuric acid are produced. Forms corrosive mixture with air (NFPA Fire Rating: 0). Reacts exothermically with moisture in air, water or steam, releasing heat and yielding sulfuric acid and HCl vapors. Reacts violently with bases, amines, amides, inorganic hydroxides; alkalis, alkali metals, dimethyl sulfoxide, dinitrogen pentoxide, lead dioxide (explosive reaction); N-methylformamide, red phosphorus. Reacts, possibly violently, with oxidizers, organic substances, strong acids, alcohols, amines, ethers e.g., diethyl ether, diisopropyl ether, especially if trace amounts of metal salts are present); glycols, peroxides. Attacks metals in the presence of moisture, forming flammable hydrogen gas. Acid formed by reaction with water can be neutralized by limestone, lime, or soda ash.
Waste Disposal
Wear nitrile rubber gloves, laboratory coat, eye protection and, if necessary, a SCBA. Cover the spill with a 1:1:1 mixture by weight of sodium carbonate or calcium carbonate, clay cat litter (bentonite) and sand. When the sulfuryl chloride has been absorbed, scoop the mixture into a plastic pail of cold water. Allow to stand for 24 hours. Test the pH of the solution and neutralize if necessary with sodium carbonate. Decant the solution to the drain flushing with 50 times its volume of water. Treat the solid residue as normal refuse.
Chemical Properties
A colorless to light yellow fuming liquid. Pungent acrid odor.
Chemical Properties
colourless or pale yellow liquid
Physical properties
Colorless, mobile liquid; turns yellow on standing; very pungent odor; refractive index 1.4437 at 20°C; density 1.667 g/mL at 20°C; vapors heavier than air, vapor density 4.7 (air=1); melts at -51°C; boils at 69.4°C; sparingly soluble in water, decomposing slowly to sulfuric and hydrochloric acids; forms a hydrate SO2Cl2?15H2O with ice-cold water; miscible with benzene, toluene, chloroform, carbon tetrachloride, and glacial acetic acid; decomposed by alkalies (violent reaction occurs).
Hazard
Strong irritant to tissue.

Material Safety Data Sheet(MSDS)

Questions And Answer

Uses
Sulfuryl chloride is used as a chlorinating and sulfonating agent in organic synthesis. It also is used in military gas.
Preparation
Sulfuryl chloride is prepared by reacting sulfur dioxide with chlorine in the presence of a catalyst, such as activated carbon or camphor. Both the gases should be in dry form and passed over the catalyst:
SO2 + Cl2 → SO2Cl2
Also, the compound can be obtained by heating chlorosulfonic acid in the presence of a catalyst: 2ClSO3H → SO2Cl2 + H2SO4
Toxicity
Sulfuryl chloride is highly corrosive to skin, eyes and mucous membranes. Reactions with alkalies, lead dioxide, phosphorus and dimethyl sulfoxide can be violent.

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