Zinc oxide food grade wholesale refers to bulk purchasing of high-purity zinc oxide (typically ≥99.5%) that meets food-additive standards for use as a nutrient supplement, colorant, or processing aid. It is distinct from industrial or pharmaceutical grades because it must comply with food safety regulations and carry documented purity and contaminant testing.
What makes zinc oxide food grade different from other grades?
Food-grade zinc oxide is manufactured and tested to meet food additive specifications, such as those set by the FAO/WHO or regional food safety authorities. Key differences include tighter limits on heavy metals like lead and arsenic, documented particle size, and full traceability from raw material to finished lot.
How do you choose a reliable wholesale supplier?
Look for suppliers who provide a certificate of analysis (CoA) for every batch, operate under recognized quality systems, and can trace their raw materials. A reputable calcium supplier or calcium manufacturer often expands into complementary minerals like zinc oxide, so their documentation practices are a useful benchmark.
When sourcing from Asia, verify that the producer follows local and international food safety standards; for example, many buyers compare offers from china calcium salts producers to gauge market norms for mineral ingredients.
What should you check in a wholesale contract?
- Batch-specific CoA and third-party test reports
- Clear specification limits for heavy metals and moisture
- Packaging that prevents contamination and moisture ingress
- Lead times, minimum order quantities, and storage conditions
Request samples and test them against your own specifications before committing to a large order. Consistent particle size and low moisture are especially important for blending and shelf stability.
常见问题
Is food-grade zinc oxide the same as USP grade?
Not necessarily. USP grade meets United States Pharmacopeia standards for pharmaceutical use, while food grade meets food additive regulations. Some products comply with both, but you should always check the specific specification sheet and CoA for your intended application.
How is food-grade zinc oxide typically packaged for wholesale?
It is usually supplied in multi-wall paper bags or fiber drums with a food-safe inner liner, often in 25 kg or 50 lb units. Packaging should protect against moisture and contamination, and suppliers should confirm compliance with food-contact material regulations.
What documentation should accompany a wholesale shipment?
A batch-specific certificate of analysis is essential, along with safety data sheets and evidence of food safety certification where applicable. Some buyers also request third-party heavy-metal test results and a declaration of allergen or GMO status.
