Talc (Mg3Si4O10(OH)2) is a clay mineral, composed of hydrated magnesium silicate. Talc is translucent to opaque, with colors ranging from whitish-grey to green with a vitreous and pearly luster. Talc is not soluble in water and is slightly soluble in dilute mineral acids.
1. Talc in powdered form, often combined with corn starch, is used as baby powder.
2. Used as a thickening agent and lubricant.
3. It is an ingredient in ceramics, paint, and roofing material.
4. It is the main ingredient in many cosmetics.