Methanesulfonic acid
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]
Biomedical References
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
Diseases, Processes, and Activities Linked to This Agent
Processes
Industrial Processes with risk of exposure: