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Toothpaste Grade Ultra-Fine Calcium Carbonate Powder. Food Grade Certification: GB 1886.214 compliant with SGS third-party testing support. High Purity Abrasive: 99% CaCO3 content, mild abrasion safe for tooth enamel. Custom Packaging Service: Flexible packaging including branded bags and moisture-proof jumbo bags. Low Heavy Metal Content: Lead, Mercury, and Cadmium levels are extremely low or undetected. Free Sample Policy: 1-2kg test samples provided free, courier fee deductible on bulk order.