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Zinc carbonate basic, also known as “basic zinc carbonate” or “zinc hydroxycarbonate,” is a chemical compound with the molecular formula Zn5(OH)6(CO3)2. It is a white, insoluble powder that occurs naturally as the mineral “hydrozincite.” Basic zinc carbonate is commonly used as a pigment in paints, rubber products, and ceramics. It is also used as a mildewcide, a fire retardant, and in the production of other zinc compounds. Additionally, it has applications in the pharmaceutical and cosmetic industries. The compound is formed through the reaction of zinc salts with alkaline substances, resulting in the precipitation of the basic carbonate.
Feature
White, tiny and shapeless powder, odorless and tasteless. Its specific weight is 4.42-4.45, insoluble in water and alcohol, slightly soluble in ammonia, soluble in dilute acid and sodium hydroxide.
Specification
| Item | Standards |
|---|---|
| Content (As Zn, dry basis), % | ≥ 57.5 |
| Loss on Ignition, % | 25.0-28.0 |
| Heavy Metal Content (As Pb), ppm | ≤ 30 |
| Moisture, % | ≤ 2.5 |
| Fineness (passes 75um screen), % | ≥ 95.0 |
| Cd content, ppm | ≤ 20 |
| Package | In 25kg plastic bagb |
Application
Application:
Pigment in Paints and Coatings: Basic zinc carbonate is used as a white pigment in the formulation of paints, coatings, and varnishes. It provides good opacity, brightness, and durability to the finished products.
Rubber and Ceramics: It is used as a filler and reinforcing agent in rubber products and ceramics, providing strength, flexibility, and resistance to abrasion.
Mildewcide: Basic zinc carbonate is used as a mildewcide in various products to inhibit the growth of mold and mildew.
Fire Retardant: It is used as a fire retardant additive in various materials to improve their fire resistance properties.
Zinc Compound Production: Basic zinc carbonate serves as a precursor in the production of other zinc compounds, such as zinc oxide and zinc stearate.
Pharmaceutical and Cosmetic Industries: It is used in the pharmaceutical and cosmetic industries as an ingredient in various formulations, such as antifungal creams, lotions, and powders.
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