Citraconic Acid

Title: Citraconic Acid
CAS Registry Number: 498-23-7
CAS Name: (Z)-2-Methyl-2-butenedioic acid
Additional Names: methylmaleic acid
Molecular Formula: C5H6O4
Molecular Weight: 130.10
Percent Composition: C 46.16%, H 4.65%, O 49.19%
Literature References: Obtained by carefully heating citric acid at about 175°. Production of citraconic anhydride from itaconic acid: Humphrey, US 2966498 (1960 to Pfizer). Toxicity study: P. M. Jenner et al., Food Cosmet. Toxicol. 2, 327 (1964).
Properties: Hygroscopic monoclinic crystals; characteristic odor. d 1.62. mp ~90° (dec). Freely sol in water, alc, ether, slightly in chloroform. Practically insol in benzene, petr ether. LD50 in rats, mice (mg/kg): 1320, 2260 orally (Jenner).
Melting point: mp ~90° (dec)
Density: d 1.62
Toxicity data: LD50 in rats, mice (mg/kg): 1320, 2260 orally (Jenner)
Citral Citramalic Acid Citrazinic Acid Citrinin Citromycetin