zincethide

[ZINC-ETHYL.] zinc-ethyl, s. Chem.: Zn(C2H5)2. Zinc-ethide. An organometallic compound discovered by Frank land, and formed by heating ethyl iodide with zinc in a sealed gla tube or copper cylinder. The zinc eth-iodide is first formed, which, when distilled in an atmosphere of hydrogen, is resolved into zinc iodide and zinc ethyl. It is a mobile, volatile, and disagreeable smelling liquid, boiling at 118°, and having a specific gravity of 1'182. It It takes fire instantly on coming in contact with the air, and water decomposes it violently with formation of zinc hydroxide and ethane (ZnH2O2+C2H6). IMG:content-1125.png:[blocks in formation] Min.: The same as HOPEITE (q. v.). zinc-spinel, s. Min.: The same as AUTOMOLITE (q. v.). zinc-sulphate, s. Chem.: ZnSO4+70H2. White vitriol. Prepared by di olving the metal in dilute sulphuric acid, or by roasting the native sulphide. Its crystals are hardly to be distinguished by the eye from sulphate of magnesia. It has an astringent metallic taste, di olves in two and a half parts of cold and a much smaller quantity of hot water, and is chiefly used in calico-printing.