Inorganic Acids & Bases
REACH
Sulfuryl chloride
CAS Number
7791-25-5
EC Number
232-245-6
Abbreviation
SO2Cl2
What is Sulfuryl chloride?
Sulfuryl chloride (CAS 7791-25-5), also known as sulfuric oxychloride and abbreviated SO2Cl2, is a reactive inorganic chlorinating and sulfonating agent.
Where is Sulfuryl chloride used?
- Pharmaceutical manufacturing: chlorinating agent in synthesis of active pharmaceutical ingredients
- Pulp and paper: bleaching agent for target brightness in processed fiber
- Textile and leather: whitening treatments and surface modification of natural substrates
- Water treatment: biocidal agent for disinfection and microbial control
- It delivers both chlorination and sulfonation in a single reagent.
Commercial specifications
- Technical grade, purity commonly 97% or higher
- Pharmaceutical-grade material meeting stricter purity specifications
- Fuming liquid in cylinders, drums, or ISO tank containers
Other Names (Synonyms)
sulphuryl dichloride|sulfuryl dichloride|sulfuric oxychloride|sulfuric dichloride|Sulfuric chloride|sulfur dichloride dioxide|Sulfonyl chloride|SO2Cl2
What are the physical properties of Sulfuryl chloride?
Melting Point -54.1 °C
Boiling Point 69.3 °C
Density 1.6674 g/cm³ @ Temp: 20 °C
Flash Point 69.1°C
Appearance A colorless to light yellow fuming liquid. Pungent acrid odor.
Color Clear colorless to yellow
Form Liquid
Water Solubility reacts
Vapor Pressure 100 mm Hg ( 17.8 °C)
Refractive Index n 20/D 1.443(lit.)
How is Sulfuryl chloride classified and handled safely? Learn More
Danger
GHS05· Corrosive GHS07· Irritant GHS06· Toxic GHS08· Health Hazard
Hazard Statements
H314 H314
H318 H318
H330 H330
H335 H335
H370 H370
H372 H372
Precautionary Statements
P260 P260
P261 P261
P264 P264
P270 P270
Which trade and regulatory codes apply to Sulfuryl chloride?
HS Code 28121099
UN Number 2927
ADR Class 6.1
Packing Group II
Storage Class 6.1B - Non-combustible acute toxic Cat. 1 and 2
very toxic hazardous materials
WGK (Germany) 2