Molecular formula: C6H5NO2
Molecular weight: 123.11

White or yellow crystal or crystalloid powder. Odourless or slightly odour. Taste slightly acidic.The PH value for 1% water liquid is 3.0~4.0. Without the hygroscopicity. A stable state of dry in aqueous solution, is also quite stable. In dilute acid or alkaline solution hardly decomposition. With acid formed quaternary ammonium salt. Carboxylic acid alkali salt with alkali formation. With heavy metal salt formation insoluble in water and salt of heavy metal sulfide and reply to nicotinic acid. The mercury salt insoluble in water, usable chlorinated mercury detection trace nicotinic acid salt. This product 60ml water 1g soluble in. Soluble in water and boil ethanol and alkaline solution of hydrogen peroxide and carbonate. Hardly soluble in ether.

Natural product exists in rice, fish, liver, heart muscle, yeast, etc.