My watch list  

Isonicotinic acid

Isonicotinic acid
Other names Pyridine-4-carboxylic Acid; 4-Pyridinecarboxylic acid;

p-Pyridinecarboxylic Acid; 4-Picolinic acid;

CAS number 55-22-1
SMILES OC(=O)c1ccncc1
Molecular formula C6H5NO2
Molar mass 123.11 g/mol
Appearance White to off-white crystalline solid
Density Solid
Melting point

310 °C decomposes

Solubility in water  ? g/100 ml (?°C)
Related Compounds
Related compounds nicotinic acid, pyridine
Except where noted otherwise, data are given for
materials in their standard state
(at 25 °C, 100 kPa)

Infobox disclaimer and references

Isonicotinic acid is an organic compound with a carboxyl group on a pyridine ring. It is an isomer of nicotinic acid — the carboxyl group for isonicotinic acid is on the 4-position instead of the 3-position for nicotinic acid.


Isonicotinic acids is a term loosely used for derivatives of isonicotinic acid. Examples include:

See also


    This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Isonicotinic_acid". A list of authors is available in Wikipedia.
    Your browser is not current. Microsoft Internet Explorer 6.0 does not support some functions on Chemie.DE