It is a White or gray-white granular 2-5mm, soluble in water, but insoluble in alcohol and acetone. Easy absorption of moisture agglomerate, with strong corrosive and permeability, It can completely broken down into ammonia and sulphuric acid when heated to 513 ℃ above. And it release ammonia when it react with alkali. Low poison, stimulating. It providing quick-release nitrogen in a granular form. The granular appearance reflects high purity and stability, while durable packaging prevents contamination during storage and transport.