Fluoride toothpaste formulations keep failing? Picking the wrong silica renders fluoride addition completely ineffective.

Many formulators report the same issue: fluoride toothpaste using calcium carbonate as an abrasive loses significant fluoride content after a few months on the shelf, making anti-caries claims impossible to substantiate. 2025 statistics from the China Oral Care Industry Association show that over 68% of mid-to-high-end toothpastes have switched to silica as their abrasive, primarily because of its better compatibility with fluoride.

Zhongqi's toothpaste-grade silica is produced via a precipitation process with tightly controlled surface inertness. Our factory is certified under ISO 22000 and FSSC 22000 food safety systems, holds HALAL and OU KOSHER product certifications, and export qualifications are fully covered.

Our abrasive-grade silica is chemically inert and does not react with sodium fluoride or sodium monofluorophosphate, maintaining fluoride retention above 95% during long-term storage. With a Mohs hardness between 4 and 5, we offer multiple RDA tiers ranging from 80 to 160, delivering sufficient stain removal without damaging enamel. Our best-selling ZLDIO-T101, with an RDA of approximately 115, strikes an excellent balance between cleaning power and gentleness, making it suitable for most daily cleaning and basic whitening toothpastes.

Some lower-priced precipitated silica products have limited purity, and may show greater stability differences when formulated with active ingredients like herbs and probiotics. Our products reach over 98% purity, with heavy metal lead ≤15 mg/kg and arsenic ≤3 mg/kg — well below national standard limits. Full fluoride compatibility test reports are available in the technical resources section of our website.

For functional toothpastes such as anti-caries, sensitive-teeth, and herbal formulas, fluoride-compatible silica should always be your first choice. Run an accelerated stability test on samples, and the difference will be immediately obvious.