Description

Zinc Carbonate Hydroxide is a versatile inorganic compound with the CAS registry number 12539-71-8, commonly utilized as a high-purity precursor and functional additive. Its value lies in its ability to serve as a controlled source of zinc oxide upon thermal decomposition, making it critical for applications requiring precise zinc content and purity. This product is essential for manufacturers in the rubber, ceramics, personal care, and specialty chemical synthesis industries seeking reliable and consistent raw material performance.

Application

• Rubber Vulcanization Activator: Acts as a key component to initiate and control the sulfur vulcanization process in natural and synthetic rubber, improving cross-linking efficiency and final product properties.
• Ceramic & Glass Opacifier/Glaze Component: Used in the formulation of ceramic glazes and glass to impart whiteness, opacity, and thermal stability.
• Personal Care & Cosmetics: Serves as a UV filter and skin protectant in sunscreens, and as a mild astringent and opacifying agent in lotions and creams.
• Precursor for Zinc Oxide Synthesis: A primary starting material for the production of high-purity zinc oxide (ZnO) nanoparticles and powders through calcination.
• Animal Nutrition & Feed Supplement: Provides a bioavailable source of essential zinc for livestock and poultry feed premixes to support animal health and growth.
• Flame Retardant & Smoke Suppressant: Incorporated into polymers and coatings to enhance fire resistance and reduce smoke emission during combustion.
• Catalyst & Catalyst Support: Employed in various organic synthesis reactions and as a support material for other catalytic systems.
• Corrosion Inhibitive Pigment: Formulated into primers and paints for metals, providing protective properties by passivating the metal surface.

Basic Information

Product Name	Zinc Carbonate Hydroxide
CAS No.	12539-71-8
Molecular Formula	Zn5(CO3)2(OH)6 (Common representation)
Molecular Weight	549.01 g/mol (for Zn5(CO3)2(OH)6)
Synonyms	Basic Zinc Carbonate; Zinc Hydroxy Carbonate; Zinc Subcarbonate; Zinc Carbonate Basic; C.I. 77950; Hydrozincite (mineral name); Zinc(2+) carbonate hydroxide (1:1:2); Zinc Monohydroxy Carbonate
EINECS	235-727-2

Quality Control

Our Zinc Carbonate Hydroxide is manufactured under a stringent quality management system. Each batch undergoes rigorous analytical testing to ensure it meets precise specifications for purity, chemical composition, and physical properties. Certificates of Analysis (COA) detailing assay, impurity profiles, and other critical parameters are available upon request to support your quality assurance and regulatory compliance needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). Keep away from incompatible materials such as strong acids. The product is hygroscopic (moisture-sensitive); ensure containers are sealed after each use to prevent absorption of atmospheric moisture.

Specification

Item	Specification
Appearance	White fine powder
Identification (IR)	Conforms
Assay (as Zn)	55.0 - 60.0 %
Loss on Ignition	25.0 - 28.0 %
Lead (Pb)	≤ 10 ppm
Cadmium (Cd)	≤ 5 ppm
Arsenic (As)	≤ 3 ppm
Mercury (Hg)	≤ 1 ppm
Acetic Acid Insoluble Matter	≤ 0.05 %
Sieve Residue (325 mesh)	≤ 0.5 %

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.