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Product Description
Zinc Oxide (ZnO, CAS: 1314-13-2) is an inorganic oxide that appears as a fine white powder. We supply a range of grades, including indirect-process ZnO, direct-process ZnO, active zinc oxide, and nano zinc oxide. Featuring high purity, low heavy metal content, and consistent batch-to-batch quality, our products are widely used in rubber vulcanization activation, coating pigments, ceramic glazes, feed additives, and cosmetic sun care formulations. Customized particle size and heavy metal specification control are available, and we also offer sample testing and OEM packaging services.
Specification & Grade Selection Table
| Parameter Name | Value |
|---|---|
| Chemical Formula | ZnO |
| Molecular Weight | 81.39g/mol |
| Appearance | White Solid |
| Melting Point | 1975°C |
| Boiling Point | 2360°C |
| Density | 5.606g/cm³ |
| Water Solubility | Insoluble in Water |
| Refractive Index | 2.008~2.029n²⁰/D |
| CAS Registry Number | 1314-13-2 |
| EINECS Registry Number | 215-222-5 |
Characteristics
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A fine white powder offering outstanding hiding power
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Excellent thermal stability and resistance to thermal decomposition
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UV-shielding and antibacterial properties (available in nano grade)
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Insoluble in water, but soluble in acids and strong alkalis
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Consistent particle size with good dispersibility
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Available in multiple grades, with customizable heavy metal content
Selling Points
- Factory direct supply with stable production capacity and dependable lead time.
- Rigorous quality control; COA test certificates provided for each batch.
- Low heavy metal content, compliant with EU and US regulatory standards.
- Custom particle size and surface modification tailored to your formulation.
- Small trial orders welcome, together with bulk container shipments.
- Professional export team supporting full set of shipping documents.
Application
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Rubber industry: Serves as a vulcanization activator, enhancing tensile strength, wear resistance, and anti-aging performance. Commonly used in tires, hoses, and sealing strips.
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Coatings & paints: Acts as a white pigment, providing anti-rust and UV-shielding effects.
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Ceramics & glass: Used as a glaze flux to improve surface gloss.
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Feed industry: Added to feed formulations as a zinc nutritional supplement.
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Cosmetics & Personal Care: Functions as a physical UV filter and mild astringent in skincare preparations.
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Plastics industry: Used as a light stabilizer and antibacterial modifier.
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Others: Used as a desulfurizing agent and electronic raw material.
Technology
Main technologies: indirect (French) process, direct (American) process, wet process and nano synthesis.
- Indirect process: Produced via vaporization and oxidation of metallic zinc, featuring high purity and low impurity levels.
- Direct process: Manufactured through high-temperature oxidation of zinc ore or slag, offering excellent cost performance.
- Active ZnO: Made by specialized calcination, with larger specific surface area.
- Nano ZnO: Synthesized by liquid precipitation, delivers ultra-fine particles and outstanding UV shielding and antibacterial properties.
Theory
Zinc oxide is an ionic oxide with a wurtzite crystal structure.
Rubber vulcanization: ZnO reacts with stearic acid to form zinc soap, which activates sulfur cross-linking and constructs a stable three-dimensional rubber network.
UV shielding: Its high refractive index enables it to reflect and absorb UVA/UVB radiation.
Antibacterial effect: Photo-generated reactive oxygen species damage microbial cell membranes.
Pigment performance: Its high refractive index provides hiding power.
Services
- 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 and collection → grinding and classification → impurity removal → inspection → packaging.
Direct process: Zinc ore/slag → high-temperature roasting and oxidation → air separation purification → milling → testing → packaging.
Active ZnO: Zinc salt solution reaction → precipitation → washing → calcination activation → milling and 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.
Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.