Zinc sulfate heptahydrate CAS 7446-20-0 is an inorganic compound with the molecular formula ZnSO4 · 7H2O, commonly known as alum or zinc alum. Colorless rhombic prism shaped crystal, white crystalline powder, soluble in water, slightly soluble in ethanol. When heated to 200 ° C, it loses water and decomposes at 770 ° C.

Zinc sulfate heptahydrate is harmful if swallowed, causing serious damage to the eyes, extremely toxic to aquatic organisms, and may have long-term adverse effects on the water environment. Zinc sulfate heptahydrate can be used as a mordant, wood preservative, bleaching agent in the paper industry, and also in pharmaceuticals, artificial fibers, electrolysis, electroplating, pesticides, and the production of zinc salts.

Chinese name: Zinc sulfate heptahydrate

Foreign name: Zinc sulfonate Heptahydrate

Nicknames: alum, zinc alum, zinc sulfate, zinc sulfate heptahydrate, zinc sulfate hydrate

Chemical formula: ZnSO4 · 7H2O

Molecular weight: 287.55

CAS login number: 7446-20-0

EINECS login number: 616-097-3

Melting point: 100 ℃

Boiling point: 500 ℃

Water solubility: 960 g/L

Density: 1.957 g/cm ³

Appearance: White crystal

Applications: mordant, wood preservatives, bleaching agents in the paper industry, pharmaceuticals, artificial fibers, electrolysis, electroplating, pesticides, production of zinc salts

Purpose

1. Used for preparing zinc supplements, astringents, etc

2. Used as a mordant, wood preservative, bleaching agent in the papermaking industry, as well as in pharmaceuticals, artificial fibers, electrolysis, electroplating, pesticides, and the production of zinc salts

3. Zinc sulfate is a supplement to zinc in feed, which is a component of many enzymes, proteins, ribose, etc. in animals. It participates in carbohydrate and fat metabolism and can catalyze the mutual conversion of pyruvate and lactate, promoting growth. Insufficient zinc can easily lead to incomplete keratosis, stunted development, and hair deterioration, and can affect animal reproductive function.

4. Zinc sulfate is a permitted food zinc fortifier. According to Chinese regulations, it can be used for table salt at a dosage of 500mg/kg; 113-318mg/kg in infant and toddler food; 130-250mg/kg in dairy products; 80-160rag/kg in grains and their products; 22.5-44mg/kg in beverages and dairy beverages.

5. Used for artificial fiber coagulant. In the printing and dyeing industry, it is used as a mordant and an alkali resistant agent for dyeing with blue salt. It is the main raw material for manufacturing inorganic pigments (such as lithopone), other zinc salts (such as zinc stearate, basic zinc carbonate), and zinc containing catalysts. Used as a preservative for wood and leather, as well as a clarifying and preserving agent for bone glue. The pharmaceutical industry is used as an emetic. It can also be used to prevent diseases in fruit tree nurseries and to manufacture cables and zinc fertilizers.

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