ChemicalBook Product Catalog Biochemical Engineering Amino Acids and proteins DL-Cystine

DL-Cystine

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];Pharmaceutical Intermediates;Amino Acids;Nutritional Supplements;Amino Acids
Mol File:923-32-0.mol
DL-Cystine Structure
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
form Powder
pka2.1(at 35℃)
color White
Water Solubility Soluble in dilute acid and alkali solution, highly soluble in water, not soluble in alcohol.
Merck 14,2782
BRN 1728095
LogP-4.340 (est)
CAS DataBase Reference923-32-0(CAS DataBase Reference)
NIST Chemistry ReferenceDl-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
MSDS Information
ProviderLanguage
DL-Cystine English
SigmaAldrich English
ACROS English
DL-Cystine Usage And Synthesis
Chemical Propertieswhite to off-white powder
UsesCystine 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.
UsesDL-cystine is used in the preparation of sulfur-containing dimeric and monomeric surfactants.
Definitioncystine: 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.
DefinitionChEBI: 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 materialsAmmonium hydroxide-->L-Cystine
N-TRIFLUOROACETYL-L-G-GLUTAMYL-L-CYSTEINE DIMETHYL ESTER, (2-2') DISULPHIDE D-CYSTINE CRYSTALLINE DL-Homocysteine DL-CYSTINE HYDROCHLORIDE N,N,N',N'-TETRAMETHYL-L-CYSTINE N,N'-BIS(TRIFLUOROACETYL) L-CYSTINE DIMETHYL ESTER MESO-CYSTINE D-PENICILLAMINE DISULFIDE L-CYSTINE DISODIUM SALT 1-HYDRATE N,N’-di-Boc-L-cystine DL-Cysteine L(-)-CYSTINE BIOSYNTH,L-CYSTINE, REAGENT GRADE, SIGMA GRADE,L-Cystine,99%,L-CYSTINE, REAG.,L-CYSTINE FREE BASE BIOTECHNOLOGY*PERFOR,L-CYSTINE,FCC L-Cystine hydrochloride N,N'-BIS(TRIFLUOROACETYL) L-CYSTINE L-Cystine Dimethyl Ester 2HCl,L-CYSTINE DIMETHYL ESTER DIHYDROCHLORIDE, >=95% N,N'-Bis(benzyloxycarbonyl)-L-cystine N,N'-DIDANSYL-L-CYSTINE L-Cystine bisallyl ester bis(p-toluenesulfonate)
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