| Identification | More | [Name]
DL-Cystine | [CAS]
923-32-0 | [Synonyms]
(+/-)-3,3'-DITHIOBIS(2-AMINOPROPIONIC ACID)
3,3'-DITHIO-BIS-(2-AMINOPROPIONIC ACID)
CYSTINE
DL-CYSTINE
(H-DL-CYS-OH)2
Cystine, DL-
DL-CYSTINE CRYSTALLINE
DL-CYSTINE, MESOFREE
H-DL-(Cys)2-OH~(+/-)-3,3'-Dithiobis(2-aminopropionicacid)
DL-Cysteine-15N
CYSTINE (DL AND MESO-MIXTURE)
2-Amino-3-(2-amino-3-hydroxy-3-oxopropyl)disulfanylpropanoic acid
(±)-2,2'-Diamino-3,3'-dithiodipropionic acid | [EINECS(EC#)]
213-094-5 | [Molecular Formula]
C6H12N2O4S2 | [MDL Number]
MFCD00084652 | [Molecular Weight]
240.3 | [MOL File]
923-32-0.mol |
| Chemical Properties | Back Directory | [Appearance]
white to off-white powder | [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 | [form ]
Powder | [pka]
2.1(at 35℃) | [color ]
White | [Water Solubility ]
Soluble in dilute acid and alkali solution, highly soluble in water, not soluble in alcohol. | [Merck ]
2782 | [BRN ]
1728095 | [LogP]
-4.340 (est) | [CAS DataBase Reference]
923-32-0(CAS DataBase Reference) | [NIST Chemistry Reference]
Dl-cystine(923-32-0) |
| Safety Data | Back Directory | [Hazard Codes ]
Xn,Xi | [Risk Statements ]
R36/37/38:Irritating to eyes, respiratory system and skin .
R22:Harmful if swallowed. | [Safety Statements ]
S37/39:Wear suitable gloves and eye/face protection .
S26:In case of contact with eyes, rinse immediately with plenty of water and seek medical advice .
S24/25:Avoid contact with skin and eyes .
S36:Wear suitable protective clothing . | [WGK Germany ]
3
| [HS Code ]
29309090 |
| Hazard Information | Back Directory | [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]
ChEBI: A sulfur-containing amino acid obtained by the oxidation of two cysteine molecules which are then linked via a disulfide bond. | [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. | [Synthesis Reference(s)]
Tetrahedron Letters, 31, p. 5007, 1990 DOI: 10.1016/S0040-4039(00)97790-6 |
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