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Isonicotinic acid

Isonicotinic acid or 4-pyridinecarboxylic acid is an organic compound with the formula C5H4N(CO2H). It is a derivative of pyridine with a carboxylic acid substituent at the 4-position. It is an isomer of picolinic acid and nicotinic acid which have the carboxyl group at the 2- and 3-position respectively compared to the 4-position for isonicotinic acid.

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Further Information

Names

Preferred IUPAC name: Pyridine-4-carboxylic acid

Other names

Isonicotinic acid
4-Pyridinecarboxylic acid
-Pyridinecarboxylic acid
4-Picolinic acid

Identifiers

CAS Number: 55-22-1

JSmol: Interactive image

ChEBI: CHEBI:6032

ChEMBL: ChEMBL1203

ChemSpider: 5709

ECHA InfoCard: 100.000.208

KEGG: C07446

PubChem: 5922

UNII: Y8SYN761TQ

Properties

Chemical formula: CHNO652

Molar mass: 123.11 g/mol

Appearance: White to off-white crystalline solid

Density: Solid

Melting point: 310 °C (590 °F; 583 K) (sublimes)

Related compounds

Related compounds: nicotinic acid

Except where otherwise noted, data are given for materials in their(at 25 °C [77 °F], 100 kPa).Except where otherwise noted, data are given for materials in their(at 25 °C [77 °F], 100 kPa).

Infobox references