... Weight: 126.12; Purity:99.8% PP bags Properties:white cystal powder,it can dissolve in glycerine,pyridine,heat ethylene ... .Quality standard:GB/T9567-1997 Item IndexSuperior-gradeAppearanceWhite powder without any foreign impurityPurity,%,≥99.8Moisture,%,≤0.1Ash content,%,≤0. ... chemical properties: 1) Name: melamine 2) Appearance and odor: white crystal 3) Formula: C3N6H64) Molecular weight: 126.12 5) ...