Cytosine
CAS Registry Number®
71-30-7
CAS Name
CytosineMolecular Formula
C4H5N3OMolecular Mass
111.10Cite this Page
Cytosine. CAS Common Chemistry. CAS, a division of the American Chemical Society, n.d. http://commonchemistry.cas.org/ChemicalDetail.aspx?ref=71-30-7 (retrieved ) (CAS RN: 71-30-7). Licensed under the Attribution-Noncommercial 4.0 International License (CC BY-NC 4.0).Compound Properties
Melting Point (1)
322.5 °C (decomp)Density (2)
1.391 g/cm³ @ Temp: Room temp
Source(s)
- (1) PhysProp data were obtained from Syracuse Research Corporation of Syracuse, New York (US)
- (2) Braun, Doris E.; Crystal Growth & Design, (2017), 17(8), 4347-4364, CAplus
Other Names and Identifiers
InChI
InChI=1S/C4H5N3O/c5-3-1-2-6-4(8)7-3/h1-2H,(H3,5,6,7,8)
InChIKey
InChIKey=OPTASPLRGRRNAP-UHFFFAOYSA-N
SMILES
NC=1NC(=O)N=CC1
Canonical SMILES
O=C1N=CC=C(N)N1
Other Names for this Substance
- 2(1H)-Pyrimidinone, 6-amino-
- 2(1H)-Pyrimidinone, 4-amino-
- Cytosine
- 6-Amino-2(1H)-pyrimidinone
- 4-Amino-2-hydroxypyrimidine
Deleted or Replaced CAS Registry Numbers
504-05-2, 14987-28-1, 26661-23-4, 66322-75-6, 66398-98-9, 66460-16-0, 66460-17-1, 80275-67-8, 88733-25-9, 118511-36-7, 149297-78-9, 918399-36-7, 1268833-99-3