| Identification | Back Directory | [Name]
DL-CYSTEIC ACID | [CAS]
3024-83-7 | [Synonyms]
DL-CYSTEIC ACID
DL-Cystetic Acid
DL-CYSTEIC ACID USP/EP/BP | [Molecular Formula]
C3H7NO5S | [MDL Number]
MFCD00065088 | [MOL File]
3024-83-7.mol | [Molecular Weight]
169.16 |
| Chemical Properties | Back Directory | [Melting point ]
273°C (rough estimate) | [density ]
1.433 (estimate) | [refractive index ]
1.5130 (estimate) | [form ]
solid | [pka]
1.3, 1.9, 8.70(at 25℃) |
| Hazard Information | Back Directory | [Definition]
ChEBI: Cysteic acid is an amino sulfonic acid that is the sulfonic acid analogue of cysteine. It has a role as an animal metabolite. It is an alanine derivative, an amino sulfonic acid, a carboxyalkanesulfonic acid, a cysteine derivative and a non-proteinogenic alpha-amino acid. | [Purification Methods]
Likely impurities are cystine and oxides of cysteine. Crystallise the acid from water by adding 2 volumes of EtOH. It crystallises from H2O as the monohydrate. When recrystallised from aqueous MeOH it has m 264-266o, and the anhydrous acid has m ~260o(dec). [Chapeville & Formageot Biochim Biophys Acta 26 538 1957, Gortner & Hoffman J Biol Chem 72 435 1927, Greenstein & Winitz The Chemistry of the Amino Acids J. Wiley, Vol 3 p1908 1961.] |
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