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]

Exposure Assessment
TIH

Yes

Dangerous When Wet

Yes - A material that, by contact with water, is liable to become spontaneously flammable or to give off flammable or toxic gas at a rate greater than 1 L per kilogram of the material, per hour; [ERG 2004]

WEEL

0.1 mg/m3

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]

Adverse Effects
Toxic Pneumonitis

Yes

Dermatotoxin

Skin Burns

Links to Other NLM Databases
Health Studies

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Toxicity Information

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Chemical Information

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Related Information in HazMap
Diseases

Occupational diseases associated with exposure to this agent:

Processes

Industrial Processes with risk of exposure: