Cytosine

Cytosine
Names
	IUPAC name 4-aminopyrimidin-2(1H)-one
	Ither names 4-amino-1H-pyrimidine-2-one
Identifiers
CAS Nummer	71-30-7 ;
3D model (JSmol)	Interactive eemage;
ChEBI	CHEBI:16040 ;
ChEMBL	ChEMBL15913 ;
ChemSpider	577 ;
ECHA InfoCard	100.000.681
KEGG	C00380 ;
MeSH	Cytosine
PubChem CID	597;
UNII	8J337D1HZY ;
	InChI InChI=1S/C4H5N3O/c5-3-1-2-6-4(8)7-3/h1-2H,(H3,5,6,7,8) Key: OPTASPLRGRRNAP-UHFFFAOYSA-N ; InChI=1/C4H5N3O/c5-3-1-2-6-4(8)7-3/h1-2H,(H3,5,6,7,8) Key: OPTASPLRGRRNAP-UHFFFAOYAY;
	SMILES c1cnc(=O)[nH]c1N;
Properties
Chemical formula	C4H5N3O
Molar mass	111.10 g/mol
Density	1.55 g/cm3 (calculatit)
Meltin pynt	320 °C (608 °F; 593 K)
Acidity (pKa)	4.45 (seicontary), 12.2 (primary)
	Except whaur itherwise notit, data are gien for materials in thair staundart state (at 25 °C [77 °F], 100 kPa).
	verify (whit is ?)
	Infobox references

Cytosine /ˈsaɪtoʊsᵻn/ (C) is ane o the fower main bases foond in DNA an RNA, alang wi adenine, guanine, an thymine (uracil in RNA).

References[eedit | eedit soorce]

↑ Dawson, R.M.C.; et al. (1959). Data for Biochemical Research. Oxford: Clarendon Press.