Agent Name

Methanesulfonic acid

Alternative Name

Methylsulfonic acid

CAS Number

75-75-2

Formula

C-H4-O3-S

Major Category

Other Classes

Synonyms

Methanesulfonate; Kyselina methansulfonova [Czech]; MSA; Methanesulphonic acid; Methylsulfonic acid; [ChemIDplus]

Category

Sulfonic Acids, Alkyl

Description

Liquid at room temperature; [HSDB] White crystals below 20 deg C; [CHEMINFO] Light yellow liquid; mp = 17-19 deg C; [Aldrich MSDS]

Sources/Uses

Used as a solvent, catalyst, and chemical intermediate; Also used in metal plating, printed circuit board manufacturing, electrolytic metal finishing, and to regenerate ion-exchange resins; [HSDB]

Comments

Corrosive to skin; [Quick CPC] CNS depression occurs in high-dose animal studies; [HSDB] Causes burns; Inhalation of high concentration can cause chemical pneumonitis; [Aldrich MSDS]

Exposure Assessment
Vapor Pressure

0.000428 mm Hg

Lethal Concentration

LC50 (rat) = >330 ppm/6hr

Explanatory Notes

Flash point = 110 deg C; [CHEMINFO]

Adverse Effects
Toxic Pneumonitis

Yes

Neurotoxin

Other CNS Neurotoxin

Dermatotoxin

Skin Burns

Links to Other NLM Databases
Health Studies

Human Health Effects from Hazardous Substances Data Bank:

Toxicity Information

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Chemical Information

Search ChemIDplus

Related Information in HazMap
Processes

Industrial Processes with risk of exposure: