Other grades of this product :
| DL-CYSTEIC ACID Basic information |
| DL-CYSTEIC ACID Chemical Properties |
| 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℃) |
| DL-CYSTEIC ACID Usage And Synthesis |
| 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.] |
| DL-CYSTEIC ACID Preparation Products And Raw materials |
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