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Product Description

Zinc Oxide (ZnO, CAS:1314-13-2) is an inorganic white powder oxide. We supply indirect, direct, active and nano zinc oxide grades. With high purity, low heavy metal and stable batch consistency, it is widely used for rubber vulcanization activation, coating pigments, ceramic glazes, feed additives and cosmetic sunscreens. Custom particle size & heavy metal control, sample testing and OEM packaging are available.

Specification & Grade Selection Table

Characteristics

• Fine white powder, strong hiding power
• Good thermal stability, anti thermal decomposition
• UV blocking & antibacterial effect (nano grade)
• Water-insoluble, soluble in acids and strong alkalis
• Consistent particle size, good dispersion
• Various grades, controllable heavy metal content

Selling Points

• Direct factory supply, stable capacity and reliable lead time
• Strict QC inspection, COA available per batch
• Low heavy metal, meets EU & US standards
• Custom particle size and surface modification for your formula
• Small trial orders accepted, bulk container delivery
• Professional export team with complete documentation

Application

• Rubber: Vulcanization activator; improves tensile strength, wear resistance and anti-aging properties (tires, hoses, sealing strips)
• Coatings & paint: White pigment with anti-rust and UV protection functions
• Ceramic & glass: Glaze flux for higher gloss
• Feed: Zinc nutritional supplement
• Cosmetic & Personal Care: Physical UV filter and mild astringent for skin care products
• Plastic: Light stabilizer and 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 ionic oxide with wurtzite crystal structure.

• Rubber vulcanization: ZnO reacts with stearic acid to form zinc soap, activate sulfur cross-linking and build stable 3D rubber network.
• UV shielding: high refractive index to reflect & absorb UVA/UVB.
• Antibacterial effect: photo-generated reactive oxygen species damage microbial cell membrane.
• Pigment performance: high refractive index provides hiding power.

Services

1. Free sample (freight collect)
   COA certificate for each batch
   MSDS available
   Support third-party test (SGS etc.)
   Custom package: 25kg bag / drum, neutral or OEM logo
   Full export documents
   Technical support: grade selection & formula consultation

Production Process

Indirect process: Zinc ingot → melting → zinc vapor oxidation → cooling collection → grinding & classification → impurity removal → inspection → packaging.
Direct process: Zinc ore/slag → high temperature roasting & oxidation → air separation purification → milling → test → packaging.
Active ZnO: Zinc salt solution reaction → precipitation → washing → calcination activation → milling & sieving.

Precautions

• Store sealed, dry & moisture-proof to prevent agglomeration.
• Wear dust mask and goggles during operation, avoid dust inhalation.
• Avoid eye & skin contact; rinse with plenty of water once touched.
• Keep away from strong oxidants.
• Not for oral consumption.
• Use up quickly after opening.