Basic Zinc Carbonate

Identity and supplied form

Basic zinc carbonate, also known as zinc hydroxide carbonate, is supplied as white powder under the commercial CAS 5970-47-8 identity. It belongs to the basic zinc carbonate family, represented by Zn5(OH)6(CO3)2 and formula weight 549.01 g/mol. Related registries also use CAS 5263-02-5 for this basic-salt family; it is distinct from simple zinc carbonate.

Grade and quality checks

The supply specification controls zinc at ≥57.5% on a dry basis, loss on ignition at 25–28%, moisture at ≤2.5%, and the fraction passing 75 µm at ≥95%. Lead is limited to ≤30 ppm and cadmium to ≤20 ppm. Retain the dry-basis zinc test condition when comparing the agreed specification and incoming analysis.

Application and process trials

Industrial developers evaluate the powder as a precursor for zinc oxide and other zinc compounds, and as a qualified additive in selected rubber, ceramic, coating and pigment systems. Particle size, elemental impurity limits and processing conditions should be matched to the complete formulation.

Application, handling and supply

Standard packing is 25 kg plastic bags. The stated shelf life is two years in sealed original packaging stored cool and dry. The matched solid references are non-dangerous goods for transport; control dust and skin, eye or respiratory exposure during transfer, and prevent uncontrolled environmental release.

See related other chemicals in our catalog.