Skip Navigation
ChemIDplus A TOXNET DATABASE LiteBrowseAdvanced

Substance Name: Cytosine
RN: 71-30-7
UNII: 8J337D1HZY
InChIKey: OPTASPLRGRRNAP-UHFFFAOYSA-N

Note

  • A pyrimidine base that is a fundamental unit of nucleic acids.

Classification Code

  • Mutation Data

Molecular Formula

  • C4-H5-N3-O

Molecular Weight

  • 111.1035
 
* denotes mobile formatted website

Links to Resources


Search for this InChIKey on the Web

Names and Synonyms

Name of Substance

  • Cytosine

MeSH Heading

  • Cytosine

Synonyms

  • 4-Amino-2(1H)-pyrimidinone
  • 4-Amino-2-hydroxypyrimidine
  • AI3-52281
  • Cyt
  • Cytosine
  • Cytosinimine
  • EC 200-749-5
  • EINECS 200-749-5
  • NSC 27787
  • UNII-8J337D1HZY

Systematic Names

  • 2(1H)-Pyrimidinone, 4-amino-
  • 2(1H)-Pyrimidinone, 6-amino-
  • Cytosine

Registry Numbers

CAS Registry Number

  • 71-30-7

FDA UNII

  • 8J337D1HZY

Other Registry Numbers

  • 118511-36-7
  • 1268833-99-3
  • 149297-78-9
  • 14987-28-1
  • 26661-23-4
  • 504-05-2
  • 66322-75-6
  • 66398-98-9
  • 66460-16-0
  • 66460-17-1
  • 80275-67-8
  • 88733-25-9
  • 918399-36-7

System Generated Number

  • 0000071307

Structure Descriptors

InChI

1S/C4H5N3O/c5-3-1-2-6-4(8)7-3/h1-2H,(H3,5,6,7,8)

InChIKey

OPTASPLRGRRNAP-UHFFFAOYSA-N

Smiles

n1c(cc[nH]c1=O)N

Toxicity

Organism Test Type Route Reported Dose (Normalized Dose) Effect Source
mouse LD50 intraperitoneal > 2222mg/kg (2222mg/kg) BEHAVIORAL: CHANGES IN MOTOR ACTIVITY (SPECIFIC ASSAY)

BEHAVIORAL: SOMNOLENCE (GENERAL DEPRESSED ACTIVITY)
Journal of Pharmacology and Experimental Therapeutics. Vol. 207, Pg. 504, 1978.

Physical Properties

Physical Property Value Units Temp (deg C) Source
Melting Point 322.5 dec deg C   EXP
log P (octanol-water) -1.73E+00 (none)   EXP
Water Solubility 8000 mg/L 25 EXP
Vapor Pressure 1.09E-03 mm Hg 25 EST
Henry's Law Constant 4.81E-11 atm-m3/mole 25 EST
Atmospheric OH Rate Constant 5.58E-11 cm3/molecule-sec 25 EST

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