Description :
This product is white or light red crystal which is toxic and irritating . It is sensitive to light.When exposed in the air ,it becomes brunet gradually. It is soluble in water, alcohol, ether, slightly soluble in cold water. Its melting point is 163.5～ 166°C.It is used for osynthesis and azo dye intermediates.This product should be sealed in nitrogen where is cool and dry   to avoid light.