Colorless cubic crystal or white crystal. It tastes salty and bitter. Easily soluble in water, soluble in liquid ammonia, slightly soluble in alcohol, insoluble in acetone or aether. It has corrosion to black metals and other metals. Use: Mainly used in ore dressing, tannage, agricultural fertilizer, used as dyeing assistants, electrobath additive, flux of metallic bond. Also used in tin plating, zinc plating, medicine, binding agent, precision casting, producing dry battery, accumulator and other ammonium salt . Package:Plastic woven bag lined with inner plastic bags. With net weight 25kg,50kg,1000kg