2-Thiouracil

2-Thiouracil
Names
	Preferred IUPAC name 2-Sulfanylidene-2,3-dihydropyrimidin-4(1H)-one
Identifiers
CAS Number	141-90-2 ;
3D model (JSmol)	Interactive image;
ChEBI	CHEBI:348530 ;
ChEMBL	ChEMBL345768 ;
ChemSpider	1066108 ;
ECHA InfoCard	100.005.008
KEGG	C19304 ;
MeSH	Thiouracil
PubChem CID	1269845;
UNII	59X161SCYL ;
CompTox Dashboard (EPA)	DTXSID4021347 ;
	InChI InChI=1S/C4H4N2OS/c7-3-1-2-5-4(8)6-3/h1-2H,(H2,5,6,7,8) Key: ZEMGGZBWXRYJHK-UHFFFAOYSA-N ; InChI=1/C4H4N2OS/c7-3-1-2-5-4(8)6-3/h1-2H,(H2,5,6,7,8) Key: ZEMGGZBWXRYJHK-UHFFFAOYAK;
	SMILES O=C1C=CNC(=S)N1;
Properties
Chemical formula	C4H4N2OS
Molar mass	128.15 g·mol−1
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

2-Thiouracil is a chemical derivative of uracil in which the oxygen atom in the 2-position of the ring is substituted by sulfur.