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Zinc oxide

Zinc oxide is a widely used "industrial MSG," renowned for its high purity, high whiteness, excellent UV shielding, and antibacterial properties. It has irreplaceable applications in rubber, coatings, ceramics, cosmetics, feed, pharmaceuticals, and electronics

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Product Description

In the rubber industry, zinc oxide is one of the most important vulcanizing activators, significantly improving the vulcanization speed, cross-linking density, and anti-aging properties of rubber products. In cosmetics, zinc oxide is a recognized safe and effective physical sunscreen, offering broad-spectrum protection against UVA and UVB rays, especially superior to other physical sunscreen ingredients in UVA protection. It is also gentle, non-irritating, and unlikely to cause allergies, making it suitable for sensitive skin. Products are available in various grades and specifications, including indirect, direct, wet, nano-grade, feed-grade, and pharmaceutical-grade, to meet the diverse needs of customers in different industries. Products strictly adhere to national standards such as GB/T 3185-2016 and international standards such as USP and EP. Small-batch trial orders and customized packaging are supported. Leveraging major ports such as Qingdao, Tianjin, and Shanghai, exports are efficient and hassle-free.

Product Information

ItemDescription
Product NameZinc Oxide
CAS No.1314-13-2
EINECS No.215-222-5
Molecular FormulaZnO
Molecular Weight81.38
AppearanceWhite or slightly yellow fine powder (odorless, bitter taste)
Main TypesIndirect Method (French Process) : Made from high-purity zinc ingots via oxidation; purity ≥99.5%-99.8%, extremely low impurities, high whiteness, fine particles. Highest quality, widely used in rubber, coatings, electronics, pharmaceuticals, cosmetics.
Direct Method (American Process) : Made from zinc ore or zinc ash via reduction and oxidation; purity ≥95%-99%, lower cost, higher impurities. Suitable for ceramics, glass, enamel, low-grade rubber.
Wet Chemical Method: Made from zinc salts via precipitation and thermal decomposition; purity ≥99.5%-99.9%, fine particles, high surface area, high activity. Suitable for catalysts, gas adsorbents, sensors.
Nano Zinc Oxide: Particle size ≤100nm, high surface area, quantum size effect, surface effect, photocatalytic activity. Suitable for UV-protective cosmetics, antibacterial materials, photocatalysts, sensors, piezoelectric materials.
Feed Grade: Purity ≥95%-99%, strict heavy metal control (Pb, As, Cd), for animal feed as zinc supplement.
Pharmaceutical Grade: USP/EP compliant, purity ≥99.0%-99.5%, for pharmaceutical excipients, topical ointments, anti-inflammatory preparations.
Key Physical & Chemical PropertiesAppearance: White or slightly yellow fine powder, odorless, bitter taste; Density: 5.606 g/cm³; Melting Point: 1975℃; Boiling Point: 2360℃ (sublimes); Refractive Index: 2.008-2.029; Solubility: insoluble in water and ethanol, soluble in acids, alkalis, ammonia water, ammonium salt solutions; Amphoteric oxide; Turns yellow upon heating (~300℃), returns to white upon cooling (reversible thermochromism).
Typical Specifications (Indirect Method Premium Grade, GB/T 3185-2016)ZnO Content: ≥99.7%; PbO: ≤0.005%; CdO: ≤0.001%; CuO: ≤0.001%; Mn: ≤0.001%; Fe: ≤0.001%; Moisture: ≤0.3%; Loss on Ignition: ≤0.2%; Water Solubles: ≤0.1%; 45μm Sieve Residue: ≤0.05%; Whiteness: ≥90%.
FeaturesHigh purity, high whiteness, fine particles, high surface area; excellent thermal stability (melting point 1975℃); UV shielding and absorption; antibacterial activity; photocatalytic activity (nano-grade); chemically stable; non-toxic and odorless.
Main ApplicationsRubber Industry (largest application, ~50%-60% of consumption) : Vulcanization activator and reinforcing filler for tires, conveyor belts, hoses, shoe soles, rubber products; improves vulcanization speed, crosslink density and aging resistance.
Coatings/Paints: Pigment and rust inhibitor for anticorrosive paints, primers, marine coatings, architectural coatings; offers hiding power, mildew resistance, rust prevention, UV resistance.
Ceramics/Glass/Enamel: Flux and colorant for glazes; reduces sintering temperature, improves gloss and whiteness; used in ceramic pigments, glass clarifiers, enamel frits.
Cosmetics/Personal Care: Sunscreens (broad-spectrum UVA/UVB absorber via reflection/scattering), foundations, powders, baby powder, toothpaste; provides sun protection, anti-inflammation, antibacterial effects; nano-ZnO is a core ingredient in physical sunscreens.
Feed Additive: Zinc supplement for animal premix and compound feed; promotes growth, prevents zinc deficiency (parakeratosis, immune deficiency).
Pharmaceutical: Topical ointments, pastes, lotions (zinc oxide ointment, calamine lotion); astringent, antibacterial, anti-inflammatory, skin-protective effects.
Electronics: Varistors, arresters, gas sensors, luminescent materials, solar cells; nano-ZnO for transparent conductive electrodes.
Catalysts: Methanol synthesis, water-gas shift, desulfurization, photocatalytic degradation; nano-ZnO exhibits high photocatalytic activity.
Others: Rubber additives, pigments (zinc white), printing auxiliaries, paper fillers, batteries, plastic additives, flame retardants.
Packaging25kg woven bags (PE liner, paper-plastic composite, kraft paper bags); 500kg or 1000kg jumbo bags; custom packaging available.
Storage ConditionsStore in cool, dry, well-ventilated area; keep sealed to prevent moisture; avoid contact with acids, alkalis, strong oxidizers; avoid mixing with food and feed.
Shipping RequirementsNon-hazardous cargo; protect from moisture and rain; handle with care.
Quality StandardsIndirect Method: GB/T 3185-2016; Direct Method: GB/T 3494-2012; Feed Grade: GB/T 32447-2015; Pharmaceutical Grade: USP, EP; Export reference: FCC, ASTM.


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FAQ

Q1: Is Huafeng Chemical a manufacturer or a trader?
A: We are a professional service provider specializing in chemical foreign trade. Rather than being limited to the products of a single factory, we leverage the chemical industry cluster in Shandong Province to integrate production resources from multiple high-quality manufacturers. This allows us to offer a wide range of sourcing options—covering various product categories and origins—instead of simply pushing a single product. Furthermore, our core competitiveness lies in our professional foreign trade services (covering documentation, logistics, and regulatory compliance), ensuring a smooth and worry-free procurement process for you.


Q2: How is the security of my transaction guaranteed when working with Huafeng Chemical?
A: We strictly adhere to international trade rules (Incoterms® 2020) and accept various payment methods, such as Letters of Credit (L/C) and Telegraphic Transfers (T/T). For new clients, we support small-batch trial orders and can clearly define arbitration clauses and applicable laws within the contract. Additionally, we maintain a robust risk management system to help you mitigate common trade risks, such as exchange rate fluctuations, shipping delays, and document discrepancies.


Q3: Do you have experience serving clients in Russian-speaking regions?
A: Yes. We place great importance on the Russian-speaking market; our team includes Russian-speaking business professionals who are well-versed in the import regulations of Russia and the Eurasian Economic Union (EAEU). We understand the importance of EAC certification to clients in these regions and can assist with related compliance inquiries. We have established connections with chemical traders across various CIS countries and have gained valuable experience in specialized packaging and temperature-controlled shipping designed to withstand harsh local winter conditions.


Q4: How do you guarantee product quality?
A: We implement a strict supplier qualification and periodic audit system. A Certificate of Analysis (COA)—issued by the original manufacturer—is provided with every shipment. We also welcome pre-shipment inspections conducted by internationally recognized third-party agencies such as SGS, BV, or ITS. Should the test results fail to meet the standards specified in the contract, you have the right to reject the goods or request a replacement.

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