Product Description

Zinc Oxide (ZnO, CAS:1314-13-2) is an inorganic oxide in white powder form. We supply indirect process, direct process, active zinc oxide and nano zinc oxide grades. Featuring high purity, low heavy metal content and stable batch consistency. Widely applied in rubber vulcanization activation, coating pigment, ceramic glaze, feed additive, cosmetic sunscreen and pharmaceutical ointment. Custom particle size & heavy metal control available, sample test and OEM packaging supported.

Specification & Grade Selection Table

Characteristics

• Fine white powder with strong hiding power
• Good thermal stability, resistant to thermal decomposition
• UV blocking & antibacterial property (nano grade)
• Insoluble in water, soluble in acid and strong alkali
• Uniform particle size and good dispersion
• Multiple grades, heavy metal content controllable

Selling Points

• Factory direct supply, stable production capacity & reliable lead time.
• Strict QC, COA test certificate for every batch.
• Low heavy metal, comply with EU & US standards.
• Custom particle size and surface modification for your formula.
• Small trial order acceptable, bulk container shipment.
• Professional export team with complete documents.

Application

• Rubber industry: vulcanization activator, improve tensile strength, wear resistance & anti-aging (tire, hose, seal strip)
• Coatings & paint: white pigment, anti-rust & UV protection
• Ceramic & glass: glaze flux, enhance gloss
• Feed: zinc nutrition supplement
• Cosmetic & Pharma: physical UV filter, astringent ointment
• Plastic: light stabilizer, antibacterial modifier
• Others: desulfurizer, electronic material

Technology

• Main technologies: indirect (French) process, direct (American) process, wet process and nano synthesis
• Indirect process: Zinc metal vaporization & oxidation, high purity and low impurities
• Direct process: High-temperature oxidation of zinc ore/slag, cost-effective
• Active ZnO: Special calcination treatment, larger specific surface area
• Nano ZnO: Liquid precipitation method, ultra-fine particles, superior UV blocking and antibacterial performance

Theory

Zinc oxide is an ionic oxide featuring a wurtzite crystal structure.

• Rubber vulcanization: ZnO reacts with stearic acid to form zinc soap, which activates sulfur cross-linking and constructs a stable 3D network within rubber.
• UV shielding: Its high refractive index enables reflection and absorption of both UVA and UVB rays.
• Antibacterial effect: Photogenerated reactive oxygen species disrupt the cell membranes of microorganisms.
• Pigment performance: High refractive index delivers strong hiding power.

Services

• Free samples available (freight collect)
• COA certificate provided for every batch
• MSDS documentation available upon request
• Third-party testing supported (SGS and other institutions)
• Custom packaging: 25kg bag / drum, neutral packing or OEM logo printing
• Complete set of export documents
• Technical support: grade recommendation and formulation consultation

Production Process

Indirect process: Zinc ingot → melting → zinc vapor oxidation → cooling and collection → grinding & classification → impurity removal → quality inspection → packaging.

Direct process: Zinc ore/slag → high-temperature roasting & oxidation → air separation purification → milling → quality testing → packaging.

Active ZnO: Zinc salt solution reaction → precipitation → washing → calcination activation → milling & sieving.

Precautions

• Keep the product hermetically sealed and stored in dry, moisture-proof conditions to avoid agglomeration.
• Wear dust masks and safety goggles during handling to prevent inhalation of powder dust.
• Avoid eye and skin contact. In case of contact, rinse thoroughly with plenty of clean water immediately.
• Keep separated from strong oxidizing agents.
• Not intended for oral ingestion.
• Use promptly once the package is opened.