Creatinine

Creatinine
Names
	Preferred IUPAC name 2-Amino-1-methyl-5H-imidazol-4-one
	Other names 2-Amino-1-methylimidazol-4-ol
Identifiers
CAS Number	60-27-5 ;
3D model (JSmol)	Interactive image; Interactive image;
Beilstein Reference	112061
ChEBI	CHEBI:16737 ;
ChEMBL	ChEMBL65567 ;
ChemSpider	21640982 ;
DrugBank	DB11846;
ECHA InfoCard	100.000.424
EC Number	200-466-7;
KEGG	D03600 ;
MeSH	Creatinine
PubChem CID	26009888; 588 minor tautomer;
UNII	AYI8EX34EU ;
CompTox Dashboard (EPA)	DTXSID8045987 ;
	InChI InChI=1S/C4H7N3O/c1-7-2-3(8)6-4(7)5/h2,8H,1H3,(H2,5,6) Key: BTXYOFGSUFEOLA-UHFFFAOYSA-N ; InChI=1/C4H7N3O/c1-7-2-3(8)6-4(7)5/h2H2,1H3,(H2,5,6,8) Key: DDRJAANPRJIHGJ-UHFFFAOYAV;
	SMILES CN1CC(=O)N=C1N; CN1CC(=O)NC1=N;
Properties
Chemical formula	C4H7N3O
Molar mass	113.120 g·mol−1
Appearance	White crystals
Density	1.09 g cm−3
Melting point	300 °C (572 °F; 573 K) (decomposes)
Solubility in water	1 part per 12 90 mg/mL at 20°C
log P	−1.76
Acidity (pKa)	12.309
Basicity (pKb)	1.688
Isoelectric point	11.19
Thermochemistry
Heat capacity (C)	138.1 J K−1 mol−1 (at 23.4 °C)
Std molar; entropy (S⦵298)	167.4 J K−1 mol−1
Std enthalpy of; formation (ΔfH⦵298)	−240.81–239.05 kJ mol−1
Std enthalpy of; combustion (ΔcH⦵298)	−2.33539–2.33367 MJ mol−1
Hazards
NFPA 704 (fire diamond)	1 1 0
Flash point	290 °C (554 °F; 563 K)
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). verify (what is ?) Infobox references

Creatinine (/kriˈætɪnɪn, -ˌniːn/; from Ancient Greek κρέας (kréas) 'flesh') is a breakdown product of creatine phosphate from muscle and protein metabolism. It is released at a constant rate by the body (depending on muscle mass).