White, crystalline, slightly water-soluble solid. melamine powder Melamine 99.8% Property: White, crystalline, slightly water-soluble solid.Specification:ItemTop ... GradeFirst GradePurity,%,≥99.899.0Moisture,%,≤0.10.2PH value7.5-9.5Ash,%, ≤0 ... ,flame accelerant, efficient cement water reducer, steel diluted agent. melamine 99.8%