CAS No:99-11-6 Citrazinic acid|1,2-dihydro-6-hydroxy-2-oxo-4-pyridinecarboxylicaci;1,2-Dihydro-6-hydroxy-2-oxo-4-pyridinecarboxylicacid;1,2-dihydro-6-hydroxy-2-oxo-isonicotinicaci;2,6-Dihydroxy-4-pyridinecarboxylic acid;2,6-dihydroxy-4-Pyridinecarboxylicacid

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Product Name: Citrazinic acid
Synonyms: 1,2-dihydro-6-hydroxy-2-oxo-4-pyridinecarboxylicaci;1,2-Dihydro-6-hydroxy-2-oxo-4-pyridinecarboxylicacid;1,2-dihydro-6-hydroxy-2-oxo-isonicotinicaci;2,6-Dihydroxy-4-pyridinecarboxylic acid;2,6-dihydroxy-4-Pyridinecarboxylicacid
CAS No.: 99-11-6
Molecular Formula: C6H5NO4
Molecular Weight : 155.11
Specification : 98%
Place of Origin: China
Appearance :
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Citrazinic acid Chemical Properties

Melting point	>300 °C(lit.)

Boiling point	278.88°C (rough estimate)

density	0.65 g/cm3

refractive index	1.5423 (estimate)

storage temp.	Store below +30°C.

solubility	practically insoluble

form	Powder

color	Yellow

PH	3.1-3.5 (100g/l, H2O)(slurry)

Water Solubility	practically insoluble

Merck	14,2325

BRN	383736

InChIKey	CSGQJHQYWJLPKY-UHFFFAOYSA-N

CAS DataBase Reference	99-11-6(CAS DataBase Reference)

NIST Chemistry Reference	Isonicotinic acid, 2,6-dihydroxy-,(99-11-6)

EPA Substance Registry System	4-Pyridinecarboxylic acid, 1,2-dihydro-6-hydroxy-2-oxo- (99-11-6)



Citrazinic acid Usage And Synthesis

Chemical Properties	yellow powder

Purification Methods	The acid is normally a yellow powder with a greenish shade, but is white when ultra pure and turns blue on long standing. It is insoluble in H2O but slightly soluble in hot HCl and soluble in alkali or carbonate solutions. It is purified by precipitation from alkaline solutions with dilute HCl, and dried in a vacuum over P2O5. The ethyl ester has m 232o (evacuated tube) and a pKa of 4.81 in MeOCH2CH2OH [IR: Pitha Coll Czech Chem Comm 28 1408 1963]. [Beilstein 22/7 V 24.]



Citrazinic acid Preparation Products And Raw materials

Raw materials	Ammonium formate-->LIMONIN(SH)-->Triethyl citrate-->TRIMETHYL CITRATE

Preparation Products	2-BROMO-6-ETHOXYPYRIDINE-4-CARBOXYLIC ACID

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