Ammonium alum 99.5% CAS No:7784-25-0 ... 3 Appearance: White crystalline double sulphate of aluminium.Colorless, transparent, massive or crystalline powder, odorless non-toxic, taste ... water, vulnerable to hot, Easy to lose the crystal water and become a white powder.2.Usage: ... livestock disease, stroke full fruit and strong alkaline soil potassium fertility. 3. Storage:Stored in dry, cool airiness ...