Chemistry:Citrazinic acid

Citrazinic acid

Names
Preferred IUPAC name 6-Hydroxy-2-oxo-1,2-dihydropyridine-4-carboxylic acid
Other names 2,6-Dihydroxyisonicotinic acid; 2,6-Dihydroxypyridine-4-carboxylic acid
Identifiers
CAS Number	99-11-6 Y
3D model (JSmol)	Interactive image
ChemSpider	7147 N
PubChem CID	7425
UNII	N8Q4XFV86A Y
InChI InChI=1S/C6H5NO4/c8-4-1-3(6(10)11)2-5(9)7-4/h1-2H,(H,10,11)(H2,7,8,9) N Key: CSGQJHQYWJLPKY-UHFFFAOYSA-N N
SMILES O=C(O)C=1\C=C(\O)NC(=O)C=1
Properties
Chemical formula	C6H5NO4
Molar mass	155.11 g/mol
Appearance	yellow powder
Melting point	>300 °C (decomp.)
Solubility in water	Slightly, with hydrolysis
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
N verify (what is YN ?)
Infobox references

Tracking categories (test):

• SizeSet

Citrazinic acid is a heterocyclic compound consisting of a dihydropyridine ring derived from citric acid. The yellow solid exists as multiple tautomers; as seen also for the simpler 2-pyridone.

Citrazinic acid is very sparingly soluble in water, acid and methanol but is soluble in basic solutions (e.g. ammonia water). For NMR purposes it is also sparingly soluble in d6-DMSO (2H, 6.20 ppm).