Caffeine Anhydrous is the core additive in caffeinated drink. It is widely accepted as safe food additive in many countries. White or almost white, crystalline powder or silky, white or almost white, crystals. Heavy metals ≤0.001% (USP) Each impurity A,B,C,D,E,F ≤0.10% (BP/EP) Total impurities ≤0.10% (USP) Assay 98.5-101.0%(USP) contact us through fe278720@gmail.com