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Methanesulfonic acid

Catalog No. A13565 Name Alfa Aesar
CAS Number 75-75-2 Website
M. F. CH4O3S Telephone
M. W. 96.10566 Fax
Purity 98+% Email
Storage Chembase ID: 107832

SYNONYMS

Title
甲磺酸
IUPAC name
methanesulfonic acid
IUPAC Traditional name
methanesulfonic acid
Synonyms
Methylsulfonic acid
Mesic acid

DATABASE IDS

Merck Index 145954
MDL Number MFCD00007518
EC Number 200-898-6
CAS Number 75-75-2
Beilstein Number 1446024

PROPERTIES

Purity 98+%
Boiling Point 166-168°C/10mm
Density 1.481
Flash Point 156°C(312°F)
Melting Point 19-20°C
Refractive Index 1.4300
GHS Pictograms GHS05
GHS Hazard statements H314
European Hazard Symbols Corrosive Corrosive (C)
GHS Precautionary statements P260-P303+P361+P353-P305+P351+P338-P301+P330+P331-P405-P501A
Risk Statements 34
RTECS PB1140000
Safety Statements 26-36-45
Storage Warning Light Sensitive & Hygroscopic
TSCA Listed
Hazard Class 8
UN Number UN2586
Packing Group III

DETAILS

REFERENCES

  • Strong acid which has been used for the deprotection of peptides; see Appendix 6.
  • Cleaves methyl ethers of phenols in the presence of the soft nucleophile methionine as a methyl acceptor. Polymethoxyaldehydes or ketones undergo selective cleavage of the methoxy group meta to the carbonyl: J. Chem. Soc., Perkin 1, 2288 (1977). Similarly, in combination with dimethyl sulfide, selective O-demethylation of mixed phosphate esters occurs: Synthesis, 451 (1983).