Cupric Arsenite — Chambers's Encyclopaedia

Cupric Arsenite, $\text{CuHAsO}_3$ (Scheele's green), is a well-known green pigment, got by adding an alkaline arsenite to cupric sulphate, and washing the precipitate till free from sulphate, and drying. This colour has been much used for wall-papers, but has been supposed to have insanitary effects. See ARSENIC.