5974. Methionic Acid

Nomenclature

CAS number: 503-40-2
Methanedisulfonic acid.
CH4O6S2; mol wt 176.17.
C 6.82%, H 2.29%, O 54.49%, S 36.40%.

Description and references

Prepn from methane + sulfur trioxide: Snyder, Grosse, US 2493038 (1950 to Houdry Process); by H2SO4 oxidation of acetic acid: Schwab, Neuwirth, Ber. 90, 567 (1957) DOI; from MeSO3H + SO3: Crowder, Gilbert, US 2842589 (1958 to Allied Chem.). Prepn of aluminum salt: Christian, Jenkins, J. Am. Pharm. Assoc. 39, 633 (1950); US 2504107 (1950 to Purdue Res. Found.).

Chemical structure

Properties

Crystals, mp 96-100°.

Derivative

Aluminum salt.

Nomenclature

CAS number: 52667-15-9
Tris[μ-[methanedisulfonato(2)]]dialuminum; aluminum methanedisulfonate.
C3H6Al2O18S6; mol wt 576.42.
C 6.25%, H 1.05%, Al 9.36%, O 49.96%, S 33.38%.

Properties

Crystals from water + alcohol. Hygroscopic. Soly in water at 27°: 69 w/v. pH of 5% aq soln = 3.5.

Use

Antiperspirant.

Therapeutic Category

Aluminum salt as topical astringent.

Keywords

Astringent