Introduction：Basic information about DL-Cystine CAS 923-32-0, including its chemical name, molecular formula, synonyms, physicochemical properties, and safety information, etc.
DL-Cystine Basic information
| Product Name: | DL-Cystine |
| Synonyms: | Cystine, DL-;(H-DL-CYS-OH)2;CYSTINE;(+/-)-3,3'-DITHIOBIS(2-AMINOPROPIONIC ACID);3,3'-DITHIO-BIS-(2-AMINOPROPIONIC ACID);DL-CYSTINE;JACS-923-32-0;DL-CYSTINE CRYSTALLINE |
| CAS: | 923-32-0 |
| MF: | C6H12N2O4S2 |
| MW: | 240.3 |
| EINECS: | 213-094-5 |
| Product Categories: | Amino Acid Derivatives;Cysteine [Cys, C];Amino Acids;Nutritional Supplements;Amino Acids;Pharmaceutical Intermediates |
| Mol File: | 923-32-0.mol |
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DL-Cystine Chemical Properties
| Melting point | 227 °C (dec.)(lit.) |
| Boiling point | 468.2±45.0 °C(Predicted) |
| density | 1.358 (estimate) |
| refractive index | 1.6000 (estimate) |
| storage temp. | Keep in dark place,Inert atmosphere,Room temperature |
| solubility | 1 M HCl: soluble |
| pka | 2.1(at 35℃) |
| form | Powder |
| color | White |
| Water Solubility | Soluble in dilute acid and alkali solution, highly soluble in water, not soluble in alcohol. |
| Merck | 14,2782 |
| BRN | 1728095 |
| Cosmetic Ingredient Review (CIR) | DL-Cystine (923-32-0) |
| LogP | -4.340 (est) |
| CAS DataBase Reference | 923-32-0(CAS DataBase Reference) |
| NIST Chemistry Reference | Dl-cystine(923-32-0) |
Safety Information
| Hazard Codes | Xn,Xi |
| Risk Statements | 36/37/38-22 |
| Safety Statements | 37/39-26-24/25-36 |
| WGK Germany | 3 |
| HS Code | 29309014 |
DL-Cystine Usage And Synthesis
| Chemical Properties | white to off-white powder |
| Uses | Cystine is a nonessential amino acid that acts as a nutrient and dietary supplement. It is very slightly soluble in water and in alcohol. it improves the biological quality of the total protein in foods containing naturally occurring intact protein. |
| Uses | DL-cystine is used in the preparation of sulfur-containing dimeric and monomeric surfactants. |
| Definition | cystine: A molecule resulting fromthe oxidation reaction between thesulphydryl (-SH) groups of two cysteine molecules .This often occurs between adjacentcysteine residues in polypeptides.The resultant disulphide bridges(-S-S-) are important in stabilizingthe structure of protein molecules. |
| Definition | ChEBI: A sulfur-containing amino acid obtained by the oxidation of two cysteine molecules which are then linked via a disulfide bond. |
| Synthesis Reference(s) | Tetrahedron Letters, 31, p. 5007, 1990 DOI: 10.1016/S0040-4039(00)97790-6 |
DL-Cystine Preparation Products And Raw materials
| Raw materials | Ammonium hydroxide-->L-Cystine |
