Chlorosulfonic acid
Agent Name
Chlorosulfonic acid
CAS Number
7790-94-5
Formula
Cl-H-O3-S
Major Category
Toxic Gases & Vapors
Synonyms
Chlorosulfuric acid; Monochlorosulfuric acid; Sulfonic acid, monochloride; Sulfuric chlorohydrin; Chlorosulphuric acid; [ChemIDplus] UN1754
Category
Other Toxic Gases & Vapors
Description
A colorless to yellow colored fuming liquid with a pungent odor; [HSDB]
Sources/Uses
Used to produce surfactants, detergents, ion-exchange resins, dyes, pesticides, military smoke screens, and other chemicals; [HSDB]
Comments
Highly corrosive to skin; [Quick CPC] High inhalation exposure can induce pulmonary edema; [CHEMINFO] A corrosive substance that can cause pulmonary edema; May cause erosion of teeth enamel; [ICSC] Reacts with water to produce hydrochloric and sulfuric acid; [AIHA]
Biomedical References
Exposure Assessment
TIH
Yes
Dangerous When Wet
Yes
Vapor Pressure
0.75 mm Hg
Lethal Concentration
LC50 (rat) = 38.5 mg/m3/4hr
Explanatory Notes
LC50 (rat) = 4,779 mg/m3/4hr; [ChemIDplus] Some “Water Reactive Materials” are also TIH materials themselves: Chlorosulfonic acid; [ERG 2016] VP = 1 MM HG AT 32 DEG C; [HSDB]
NFPA
will not burn
ERPG-1
2 mg/m3
ERPG-2
10 mg/m3
ERPG-3
30 mg/m3
WEEL
0.1 mg/m3
Adverse Effects
Toxic Pneumonitis
Yes
Dermatotoxin
Skin burns
Diseases, Processes, and Activities Linked to This Agent
Diseases
Occupational diseases associated with exposure to this agent:
Processes
Industrial Processes with risk of exposure: