Zinc is a blue-white metal with a melting point of 4 19.5℃. At room temperature, sex is fragile; 100 ~ 150℃ softening; When it exceeds 200℃, it becomes brittle again. The chemical properties of zinc are active. In room temperature air, a thin and dense film of basic zinc carbonate is formed on the surface, which can prevent further oxidation.

1. Used as analytical reagent, such as reducing agent, for the determination of arsenic, copper and nitrate.

2. It is used as reducing agent together with acetic acid, hydrochloric acid, sulfuric acid, alkali and water (including chloride). Zinc powder distillation. Preparation of organic zinc compounds. Reformatsky reaction. Preparation of phenyl carbene from benzaldehyde.

3. Used as catalyst and reducing agent, used in organic synthesis, zinc plating and preparation of nonferrous metal alloys.

4. In the galvanizing industry, zinc can form alloys with many nonferrous metals, among which the alloys of zinc with aluminum and copper are widely used in die casting. Brass consisting of zinc, copper, tin and lead, used in machinery manufacturing.

5. Zinc plate containing a small amount of lead, cadmium and other elements can be made into negative electrode of zinc-manganese dry battery, printed zinc plate, powder etching photographic plate and offset printing plate. Zinc can react with acid or strong alkali to release hydrogen.

6. Zinc fertilizer (zinc sulfate, zinc chloride) can promote plant cell respiration and carbohydrate metabolism. Zinc powder, lithopone and zinc chrome yellow can all be used as pigments.

7. Zinc oxide can also be used in medicine, rubber, coatings and other industries.