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Substance Name: Cystine [USAN:INN]
RN: 56-89-3
UNII: 48TCX9A1VT
InChIKey: LEVWYRKDKASIDU-IMJSIDKUSA-N

Note

  • A covalently linked dimeric nonessential amino acid formed by the oxidation of CYSTEINE. Two molecules of cysteine are joined together by a disulfide bridge to form cystine.

Molecular Formula

  • C6-H12-N2-O4-S2

Molecular Weight

  • 240.3028
 

Classification Codes

  • Amino Acid
  • Drug / Therapeutic Agent
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Names and Synonyms

Results Name

  • Cystine [USAN:INN]

Name of Substance

  • Cystine
  • Cystine [USAN:INN]

MeSH Heading

  • Cystine

Synonyms

  • (R-(R*,R*))-3,3'-Dithiobis(2-aminopropanoic acid)
  • 1-Cystine
  • 3,3'-Dithiobis(2-aminopropanoic acid)
  • 3,3'-Dithiobis(2-aminopropanoic acid), (R-(R*,R*))-
  • 3,3'-Dithiodialanine
  • 4-04-00-03155 (Beilstein Handbook Reference)
  • AI3-09064
  • Alanine, 3,3'-dithiobis-
  • Alanine, 3,3'-dithiodi-
  • beta,beta'-Diamino-beta,beta'-dicarboxydiethyl disulfide
  • beta,beta'-Diamino-beta,beta'-dicarboxydiethyldisulfide
  • beta,beta'-Dithioalanine, L-
  • beta,beta'-Dithiodialanine
  • Bis(beta-amino-beta-carboxyethyl)disulfide
  • BRN 1728094
  • CCRIS 5822
  • Cysteine disulfide
  • Cystin
  • Cystin (VAN)
  • Cystine
  • Cystine (L)-
  • Cystine (VAN)
  • Cystine acid
  • Dicysteine
  • EC 200-296-3
  • EINECS 200-296-3
  • L-Alanine, 3,3'-dithiobis-
  • L-Cysteine disulfide
  • L-Cystin
  • NSC 13203
  • Oxidized L-cysteine
  • Propanoic acid, 3,3'-dithiobis(2-amino-, (R-(R*,R*))-
  • UNII-48TCX9A1VT

Systematic Names

  • Cystine
  • L-Cystine

Superlist Name

  • Cystine, L-

Registry Numbers

CAS Registry Number

  • 56-89-3

FDA UNII

  • 48TCX9A1VT

Other Registry Numbers

  • 154605-69-3
  • 24645-67-8

System Generated Number

  • 0000056893

Structure Descriptors

InChI

1S/C6H12N2O4S2/c7-3(5(9)10)1-13-14-2-4(8)6(11)12/h3-4H,1-2,7-8H2,(H,9,10)(H,11,12)/t3-,4-/m0/s1

InChIKey

LEVWYRKDKASIDU-IMJSIDKUSA-N

Smiles

C([C@@H](C(=O)O)N)SSC[C@@H](C(=O)O)N

Toxicity

Organism Test Type Route Reported Dose (Normalized Dose) Effect Source
mouse LD50 intraperitoneal > 961mg/kg (961mg/kg)   Yakugaku Zasshi. Journal of Pharmacy. Vol. 94, Pg. 1419, 1974.
rat LDLo oral 25gm/kg (25000mg/kg)   Oyo Yakuri. Pharmacometrics. Vol. 15, Pg. 199, 1978.

Physical Properties

Physical Property Value Units Temp (deg C) Source
Melting Point 260.5 dec deg C   EXP
pKa Dissociation Constant 1 (none)   EXP
log P (octanol-water) -5.08E+00 (none)   EXP
Water Solubility 190 mg/L 20 EXP
Vapor Pressure 2.12E-10 mm Hg 25 EST
Henry's Law Constant 4.98E-19 atm-m3/mole 25 EST
Atmospheric OH Rate Constant 3.19E-10 cm3/molecule-sec 25 EST

Physical property data is provided to ChemIDplus by SRC, Inc.