arsenide

[Eng. arsen(ic); -ide. ] An alloy of arsenic with a metal. These alloys are generally brittle. Metallic arsenides, when fused with nitre, are converted into basic arseniates. Arsenides fused with sulphur and an alkaline carbonate yield a sulph arsenite or sulph arsenate of the alkali metal, and the other metal remains as a sulphide free from arsenic. ar-sen'-i-ō, in compos. [Eng., ., arseni(c); -0.] Containing arsenic. 315 copper (Schweinfurt green) is used as a pigment for wall papers, and is very poisonous. Arsenite of sodium, formed by di olving As2O3 in caustic soda, is used to prepare the papers to poison flies. Arsenious oxide is used to poison rats and as a finx for gla , also in calico printing and for making pigments. Arsenites are decomposed by heat. Hydrosulphuric acid (H2S) gives a yellow precipitate, AsaS3. from a solution of an arsenite in hydrochloric acid.