(Zn. Eq.=32-5.) Zinc, and Granulated Zinc. Appendix.

Prep. Obtained from the sulphuret, Blende, or the native carbonate, Calamine, by distillation with carbonaceous matters. Granulated zinc is prepared by fusing zinc and pouring it into cold water.

Prop. & Comp. A bluish-white crystalline metal; sp. gr. 6.86; soluble in dilute hydrochloric and sulphuric acids with evolution of hydrogen, also in nitric acid. The gas evolved on the addition of pure sulphuric acid does not blacken a piece of paper moistened with acetate of lead, and when ignited gives no dark stain to the lid of a porcelain crucible held low down in the flame, showing that the metal is free from sulphur and arsenic. The precipitate thrown down by ammonia is re-dissolved by excess of that reagent. Used in pharmacy for the preparation of the chloride.