Product Overview
Talc, Powder, USP
Molecular Formula: 3MgO•4SiO2•H2O
CAS Number: 14807-96-9
Molecular Weight: 379.29
Talc, or talcum, is a clay mineral, composed of hydrated magnesium silicate. Talc in powdered form, often combined with corn starch, is used as baby powder. This mineral is used as a thickening agent and lubricant; is an ingredient in ceramics, paint, and roofing material; and is a main ingredient in many cosmetics. It occurs as foliated to fibrous masses, and in an exceptionally rare crystal form. It has a perfect basal cleavage and an uneven flat fracture, and it is foliated with a two-dimensional platy form.
| TEST | RESULTS |
|---|---|
| Appearance | White to gray-white powder |
| Identification | Complies |
| Water Soluble Matter | 0.05% |
| Acidity or Alkalinity | Complies |
| Loss on Ignition | 5.32% |
| Aluminum | ≤ 2.0% |
| Calcium | ≤ 0.9% |
| Iron | < 0.25% |
| Lead | |
| Magnesium | 17.0 - 19.5% |
| Mold/Yeast | 0 cfu/g |
| Total of Bacteria | 20 cfu/g |
