Skip Navigation
ChemIDplus A TOXNET DATABASE LiteBrowseAdvanced

Substance Name: Cysteine [INN]
RN: 52-90-4
UNII: K848JZ4886
InChIKey: XUJNEKJLAYXESH-REOHCLBHSA-N

Note

  • A thiol-containing non-essential amino acid that is oxidized to form CYSTINE.

Molecular Formula

  • C3-H7-N-O2-S

Molecular Weight

  • 121.159
 

Classification Codes

  • Drug / Therapeutic Agent
  • Mutation Data
  • Reproductive Effect

Names and Synonyms

Name of Substance

  • Cysteine
  • Cysteine [INN]

MeSH Heading

  • Cysteine

Synonyms

  • (R)-2-Amino-3-mercaptopropanoic acid
  • (R)-2-Amino-3-mercaptopropionic acid
  • (R)-Cysteine
  • 2-Amino-3-mercaptopropanoic acid, (R)-
  • 2-Amino-3-mercaptopropionic acid
  • AI3-26559
  • alpha-Amino-beta-mercaptopropanoic acid, L-
  • alpha-Amino-beta-mercaptopropionic acid, L-
  • alpha-Amino-beta-thiolpropionic acid
  • alpha-Amino-beta-thiolpropionic acid, L-
  • beta-Mercaptoalanine
  • beta-Mercaptoalanine, L-
  • CCRIS 912
  • Cisteina
  • Cisteina [INN-Spanish]
  • Cisteina [Spanish]
  • Cisteinum
  • Cisteinum [Latin]
  • Cystein
  • Cysteine
  • Cysteinum
  • Cysteinum [INN-Latin]
  • EC 200-158-2
  • EINECS 200-158-2
  • FEMA No. 3263
  • Half cystine
  • Half-cystine
  • HSDB 2109
  • L-(+)-Cysteine
  • L-Alanine, 3-mercapto-
  • NSC-8746
  • Propanoic acid, 2-amino-3-mercapto-, (R)-
  • Thioserine
  • UNII-K848JZ4886

Systematic Name

  • L-Cysteine

Superlist Names

  • Cysteine, L-
  • L-2-Amino-3-mercaptopropanoic acid
  • L-Cysteine

Registry Numbers

CAS Registry Number

  • 52-90-4

FDA UNII

  • K848JZ4886

Other Registry Numbers

  • 154605-72-8
  • 4371-52-2

Related Registry Number

  • 7048-04-6 (Hydrochloride)

System Generated Number

  • 0000052904

Structure Descriptors

InChI

1S/C3H7NO2S/c4-2(1-7)3(5)6/h2,7H,1,4H2,(H,5,6)/t2-/m0/s1

InChIKey

XUJNEKJLAYXESH-REOHCLBHSA-N

Smiles

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

Toxicity

Organism Test Type Route Reported Dose (Normalized Dose) Effect Source
mouse LD50 intraperitoneal 1400mg/kg (1400mg/kg) LUNGS, THORAX, OR RESPIRATION: RESPIRATORY DEPRESSION

BEHAVIORAL: ATAXIA

BEHAVIORAL: SOMNOLENCE (GENERAL DEPRESSED ACTIVITY)
Oyo Yakuri. Pharmacometrics. Vol. 7, Pg. 1251, 1973.
mouse LD50 intravenous 1250mg/kg (1250mg/kg)   Yakugaku Zasshi. Journal of Pharmacy. Vol. 89, Pg. 1138, 1969.
mouse LD50 oral 660mg/kg (660mg/kg)   Archives of Toxicology. Vol. 41, Pg. 79, 1978.
mouse LD50 subcutaneous 1360mg/kg (1360mg/kg) BEHAVIORAL: SOMNOLENCE (GENERAL DEPRESSED ACTIVITY)

LUNGS, THORAX, OR RESPIRATION: RESPIRATORY DEPRESSION

BEHAVIORAL: ATAXIA
Oyo Yakuri. Pharmacometrics. Vol. 7, Pg. 1251, 1973.
rat LD50 intraperitoneal 1620mg/kg (1620mg/kg) BEHAVIORAL: ATAXIA

BEHAVIORAL: SOMNOLENCE (GENERAL DEPRESSED ACTIVITY)

LUNGS, THORAX, OR RESPIRATION: RESPIRATORY DEPRESSION
Oyo Yakuri. Pharmacometrics. Vol. 7, Pg. 1251, 1973.
rat LD50 intravenous 1140mg/kg (1140mg/kg)   Journal of the American College of Toxicology. Vol. 12, Pg. 113, 1993.
rat LD50 oral 1890mg/kg (1890mg/kg) KIDNEY, URETER, AND BLADDER: OTHER CHANGES IN URINE COMPOSITION

BEHAVIORAL: SOMNOLENCE (GENERAL DEPRESSED ACTIVITY)

LUNGS, THORAX, OR RESPIRATION: DYSPNEA
Agents and Actions, A Swiss Journal of Pharmacology. Vol. 4, Pg. 125, 1974.
rat LD50 subcutaneous 1550mg/kg (1550mg/kg) BEHAVIORAL: ATAXIA

BEHAVIORAL: SOMNOLENCE (GENERAL DEPRESSED ACTIVITY)

LUNGS, THORAX, OR RESPIRATION: RESPIRATORY DEPRESSION
Oyo Yakuri. Pharmacometrics. Vol. 7, Pg. 1251, 1973.

Physical Properties

Physical Property Value Units Temp (deg C) Source
Melting Point 240 dec deg C   EXP
pKa Dissociation Constant 1.71 (none)   EXP
log P (octanol-water) -2.49E+00 (none)   EXP
Water Solubility 2.77E+05 mg/L 25 EXP
Vapor Pressure 2.07E-06 mm Hg 25 EST
Henry's Law Constant 5.30E-11 atm-m3/mole 25 EST
Atmospheric OH Rate Constant 7.96E-11 cm3/molecule-sec 25 EST

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