3,3'-Thiodipropionic Acid
Title: 3,3¢-Thiodipropionic Acid
CAS Registry Number: 111-17-1
CAS Name: 3,3¢-Thiobis[propanoic acid]
Additional Names: b,b-thiodipropionic acid; thiodihydracrylic acid; diethyl sulfide 2,2¢-dicarboxylic acid
Molecular Formula: C6H10O4S
Molecular Weight: 178.21
Percent Composition: C 40.44%, H 5.66%, O 35.91%, S 17.99%
Literature References: Prepn: GB 571628 (1945 to Am. Cyanamid); Gresham, Shaver, US 2449992 (1948 to B. F. Goodrich).
Properties: Nacreous leaflets from hot water, mp 134°. pK (25°) 4.11. One gram dissolves in 26.9 ml water at 26°. Freely sol in hot water, alcohol, acetone.
Melting point: mp 134°
pKa: pK (25°) 4.11
Use: Antioxidant for soap products and polymers of ethylene. In plasticizers and lubricants. Proposed for edible fats, oils, other foods.

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