Chloroacetic Acid
Structural Formula Vector Image
Title: Chloroacetic Acid
CAS Registry Number: 79-11-8
Additional Names: Chloroethanoic acid; monochloroacetic acid; MCA
Molecular Formula: C2H3ClO2
Molecular Weight: 94.50
Percent Composition: C 25.42%, H 3.20%, Cl 37.52%, O 33.86%
Line Formula: ClCH2COOH
Literature References: Made by chlorination of glacial acetic acid in presence of small amount of sulfur or iodine; also by hydrolysis of trichlorethylene with 90% H2SO4. Lab prepn: Gattermann-Wieland, Praxis des Organischen Chemikers (de Gruyter, Berlin, 40th ed., 1961) pp 109, 110. Manuf: Faith, Keyes & Clark's Industrial Chemicals, F. A. Lowenheim, M. K. Moran, Eds. (Wiley-Interscience, New York, 4th ed., 1975) pp 254-257. Toxicity: Woodward et al., J. Ind. Hyg. Toxicol. 23, 78 (1941).
Properties: Colorless or white, deliquesc crystals. d 1.580. Exists in a, b and g forms having mp 63°, 55-56° and 50° respectively. mp for acid of commerce is 61-63°. bp for all forms is 189°. Very sol in water; sol in alcohol, benzene, chloroform, ether. Keep well closed and in a cool place.
Melting point: Exists in a, b and g forms having mp 63°, 55-56° and 50° respectively; mp for acid of commerce is 61-63°
Boiling point: bp for all forms is 189°
Density: d 1.580
Derivative Type: Sodium salt
Trademarks: Somon (Atlas)
Molecular Formula: C2H2ClNaO2
Molecular Weight: 116.48
Percent Composition: C 20.62%, H 1.73%, Cl 30.44%, Na 19.74%, O 27.47%
Properties: White crystalline solid. Soly in water at 20°: 85 g/100 ml. LD50 in rats, mice, guinea pigs (mg/kg): 76, 255, 80 orally (Woodward).
Toxicity data: LD50 in rats, mice, guinea pigs (mg/kg): 76, 255, 80 orally (Woodward)
CAUTION: Irritating to skin, mucous membranes.
Use: Herbicide. Manuf various dyes and other organic chemicals.

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