Magnesium silicate
Magnesium silicate is a compound of magnesium oxide and silicon. It is the magnesium salt of silicic acid containing an unspecified amount of water. The molecular formula can be expressed more clearly as MgSiO3.xH2O. It is known as talc and it presents many uses in the cosmetic industry, food industry and pharmaceutical industry. Under the FDA, magnesium silicate is determined as a member of the substances generally recognized as safe (GRAS) to be used as an anticaking agent.