Productiong Name : Isonicotinic Acid Byname : 4-carboxypyridine; 4-picolinic acid; 4-pyridinecarboxylic acid; acide iso-nicotinique CAS : 55-22-1 formula : C6H5NO2 molecular weight : 123.11 boiling point : 260 ° C melting point : 310-315 ° C Description :white needle crystal. Melting point 319 ° C (315 ° C). More soluble in water and aqueous solution of pH 3.6, water-soluble, almost insoluble HBS; Benzene and ether. Can sublimation. Odorless. Purposes : the goods for pharmaceutical intermediates. Preparation key for isoniazid sample name