Chlorosulfonic Acid

ClSO₃H

IUPAC: Chlorosulfuric acid

CAS: 7790-94-5

Overview

Chlorosulfonic acid is an extremely corrosive liquid that reacts violently with water. It is used to introduce sulfonyl chloride groups in organic synthesis.

Composition

Element Symbol Atoms Atomic Mass
Hydrogen H 1 1.0080
Oxygen O 3 15.9990
Sulfur S 1 32.0600
Chlorine Cl 1 35.4500

Elemental Composition

H
Hydrogen ×1
0.9%
O
Oxygen ×3
41.2%
S
Sulfur ×1
27.5%
Cl
Chlorine ×1
30.4%

Uses

  • • Sulfonation reagent
  • • Detergent production
  • • Pharmaceutical synthesis
  • • Smoke screen generation

Fun Facts

  • ✦ Generates dense white smoke on contact with moist air, once used for military smoke screens

Safety

  • ⚠ Extremely corrosive
  • ⚠ Reacts violently with water
  • ⚠ Toxic fumes

Structure

SMILES

OS(=O)(=O)Cl

Properties

Type
acid
State
liquid
Molar Mass
116.52 g/mol
Density
1.7530 g/cm³
Melting Point
-80.0 °C
Boiling Point
152.0 °C
Solubility
decomposes violently

Molecular Descriptors

Exact Mass
115.9335
XLogP
-0.1
TPSA
62.8 Ų
H-Bond Donors
1
H-Bond Acceptors
3
Rotatable Bonds
0
Heavy Atoms
5
Complexity
92.0

Related Compounds

Acetic Acid

CH₃COOH

Boric Acid

H₃BO₃

Carbonic Acid

H₂CO₃

Chloric Acid

HClO₃

Chlorous Acid

HClO₂

Hydrobromic Acid

HBr

Hydrochloric Acid

HCl

Hydrofluoric Acid

HF

Hydrogen Cyanide

HCN

Hydrogen Sulfide

H₂S

Frequently Asked Questions

What is Chlorosulfonic Acid?
Chlorosulfonic Acid (ClSO₃H) is a acid compound with the IUPAC name Chlorosulfuric acid.
What is the molecular weight of Chlorosulfonic Acid?
Chlorosulfonic Acid has a molar mass of 116.52 g/mol.
What state is Chlorosulfonic Acid at room temperature?
Chlorosulfonic Acid is a liquid at room temperature.
Is Chlorosulfonic Acid organic or inorganic?
Chlorosulfonic Acid is classified as an inorganic compound.
What elements make up Chlorosulfonic Acid?
Chlorosulfonic Acid (ClSO₃H) is composed of Hydrogen (H), Oxygen (O), Sulfur (S), Chlorine (Cl).