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Must‑Read for Buyers: Key Specifications of Silica for Toothpaste (QB/T 2346‑2015)
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Many buyers only look at price, then regret it when the material fails testing and causes production problems. Toothpaste-grade silica has its own industry standard, QB/T 2346-2015. There are several core indicators you have to watch, or you'll run into issues without understanding why.
Zhongqi's entire toothpaste silica line complies with QB/T 2346-2015, and every batch goes through full standard testing before leaving the factory. We run our own microbial lab and physical/chemical testing lab with complete equipment — we don't rely solely on third-party testing.
Here are the key indicators every buyer should watch: Silica content (after ignition) ≥96% — we run above 98%. pH of 5% aqueous dispersion should be 5.5–8.5 per the standard — we control to a tighter 6.0–8.5 range. 325-mesh residue ≥98%, guaranteeing no oversized particles. Heavy metals: lead ≤15 mg/kg, arsenic ≤3 mg/kg — well below the national limit. Microbial indicators also fully pass, with total aerobic count ≤200 cfu/g.
Some lower-priced products have looser indicator controls — for example, lower purity or heavy metal levels close to standard limits. Issues may not appear short-term, but there is risk of quality fluctuation with long-term use. We issue a full COA for every batch with traceable data. The complete national standard comparison table is available on our quality standards page.
Buyers shouldn't just compare prices. Check each indicator against the national standard one by one, and you'll avoid major pitfalls.
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