... : Mg3Si4O10(OH)2, Magnesium Silicate Hydroxide hydrated magnesium silicateThe main ingredients of talc powder is ... powder etc. (2) Pharmaceutical - food grade (YS): Pharmaceutical tablets, sugar-coated, talcum powder and Chinese medicine prescriptions, food additives, isolation agent ... , cosmetics, copper paper coatings, textile, and other lubricants. hydrated magnesium silicate