Bismuth(III) Oxychloride

Bismuth(III) oxychloride is a chemical compound with the molecular formula BiOCl. It is also known as bismuthyl chloride or bismuthyl trichloride. The compound is formed by the reaction of bismuth(III) oxide (Bi2O3) and hydrochloric acid (HCl).

Bismuth(III) oxychloride crystallizes in a monoclinic crystal system and has a layered structure consisting of BiO+ layers with Cl- ions between them. The compound is a white or pale yellow powder that is insoluble in water but soluble in acids.

Bismuth(III) oxychloride has several applications in industry and cosmetics. It is used as a starting material for the preparation of other bismuth compounds, such as bismuth subnitrate, and as a pigment in cosmetics and personal care products. It is also used as a component in some types of dental filling materials.

The compound has low toxicity and is considered safe for use in cosmetics and personal care products when used within certain limits. However, excessive exposure to bismuth(III) oxychloride may cause irritation of the eyes, skin, and respiratory tract. Therefore, appropriate precautions should be taken during its handling and use.