Citrazinic Acid
Title: Citrazinic Acid
CAS Registry Number: 99-11-6
CAS Name: 1,2-Dihydro-6-hydroxy-2-oxo-4-pyridinecarboxylic acid
Additional Names: 2,6-dihydroxyisonicotinic acid; 2,6-dihydroxy-4-pyridinecarboxylic acid
Molecular Formula: C6H5NO4
Molecular Weight: 155.11
Percent Composition: C 46.46%, H 3.25%, N 9.03%, O 41.26%
Literature References: Prepn from citric acid with aq NH3 at 140-160° under pressure: Bavley, Hamilton, US 2729647 (1956 to Pfizer). Purification: Bavley et al., US 2738352 (1956 to Pfizer).
Properties: Yellowish powder with a greenish tinge; carbonizes above 300° without melting. Ultrapure material which is white or colorless, has been prepared. Almost insol in water; slightly sol in hot HCl; sol in alkali hydroxide or carbonate solns. Alkaline solns turn blue on standing.

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