M

Methanesulfonic acid

IUPAC: methanesulfonic acid

CH4O3S Laboratory Reagents CAS 75-75-2
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Quick Reference
Formula / NotationCH4O3S
CAS Number75-75-2
Molecular Weight96.11
Melting Point20 °C
Boiling Point167 °C at 10 mm Hg
Density1.4812 g/cu cm at 18 °C
SolubilitySolubility at 26-28 °C in wt %: hexane, 0; benzene, 1.5; methylcyclopentane, 0; toluene, 0.38; o-chlorotoluene, 0.23; ethyl disulfide, 0.47
AppearanceLiquid
Also Known As75-75-2; Methylsulfonic acid; Methanesulphonic acid; Kyselina methansulfonova; DTXSID4026422; NSC-3718; 12EH9M7279; J1.465F; DTXCID806422; CHEBI:27376
CategoryLaboratory Reagents

What is Methanesulfonic acid?

Methanesulfonic acid is an alkanesulfonic acid in which the alkyl group directly linked to the sulfo functionality is methyl. It has a role as an Escherichia coli metabolite. It is an alkanesulfonic acid and a one-carbon compound. It is a conjugate acid of a methanesulfonate.

Formula & Notation

CH4O3S

IUPAC Name: methanesulfonic acid

Other Names / Synonyms: 75-75-2; Methylsulfonic acid; Methanesulphonic acid; Kyselina methansulfonova; DTXSID4026422; NSC-3718; 12EH9M7279; J1.465F; DTXCID806422; CHEBI:27376

Properties & Characteristics

Appearance: Liquid. Molecular formula: CH4O3S. Molecular weight: 96.11 g/mol. Boiling point: 167 °C at 10 mm Hg. Melting point: 20 °C. Density: 1.4812 g/cu cm at 18 °C. Solubility: Solubility at 26-28 °C in wt %: hexane, 0; benzene, 1.5; methylcyclopentane, 0; toluene, 0.38; o-chlorotoluene, 0.23; ethyl disulfide, 0.47. Vapor pressure: 0.000428 [mmHg]. LogP: -0.9.

Physical Data

PropertyValue
Melting Point20 °C
Boiling Point167 °C at 10 mm Hg
Density1.4812 g/cu cm at 18 °C
Molecular Weight96.11
SolubilitySolubility at 26-28 °C in wt %: hexane, 0; benzene, 1.5; methylcyclopentane, 0; toluene, 0.38; o-chlorotoluene, 0.23; ethyl disulfide, 0.47
AppearanceLiquid

Uses & Applications

Used as a synthetic reagent for transformations including oxidation, reduction, coupling, or functional group manipulation.

Safety Information

Hazardous reagent. May be toxic, corrosive, flammable, or reactive. Use in fume hood with full PPE. Consult SDS before use.

Always consult the SDS/MSDS before handling any chemical. This information is for educational purposes only.

Key Facts

Term Methanesulfonic acid
Formula CH4O3S
CAS Number 75-75-2
Molecular Weight 96.11
Synonyms 75-75-2; Methylsulfonic acid; Methanesulphonic acid; Kyselina methansulfonova; DTXSID4026422; NSC-3718; 12EH9M7279; J1.465F; DTXCID806422; CHEBI:27376

Frequently Asked Questions

Methanesulfonic acid is an alkanesulfonic acid in which the alkyl group directly linked to the sulfo functionality is methyl. It has a role as an Escherichia coli metabolite. It is an alkanesulfonic acid and a one-carbon compound. It is a conjugate acid of a methanesulfonate.

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Editorial standards: Chemical data is sourced from peer-reviewed literature, CAS Registry, NIST WebBook, and PubChem. Safety information reflects guidance from OSHA, ECHA, and IAEA. For educational purposes only — always consult official SDS documentation and qualified professionals before handling chemicals.