9331. Thiodiglycolic Acid

Nomenclature

CAS number: 123-93-3
2,2′-Thiobis[acetic acid]; dimethylsulfide-α,α′-dicarboxylic acid; mercaptodiacetic acid.
C4H6O4S; mol wt 150.15.
C 32.00%, H 4.03%, O 42.62%, S 21.36%.

Description and references

Prepn from sodium chloroacetate and hydrogen sulfide: Loven, Ber. 27, 3059 (1894).

Chemical structure

Properties

Crystals from water. mp 129°. Sol in water, alcohol.

Use

Detection of copper, lead, mercury, silver: Dubsky et al., C.A. 34, 6185 (1940).