Bulk calcium carbonate for toothpaste grade is a high-purity, fine-particle mineral powder used as a mild abrasive and whitening agent in oral care products. It must meet strict limits for heavy metals, arsenic, and microbial content to ensure consumer safety.
What makes calcium carbonate suitable for toothpaste?
Toothpaste-grade calcium carbonate typically requires purity above 98% and controlled particle size, often between 1 and 15 microns, to balance cleaning power with enamel safety. It should be free of gritty impurities and have low moisture content to prevent clumping.
How do you choose a reliable calcium supplier?
Look for a calcium manufacturer with documented quality systems, such as ISO 9001 and GMP, and request a certificate of analysis for each batch. A reputable calcium supplier will provide consistent particle size distribution and full traceability. Many buyers also source related ingredients like china calcium salts from the same partner to simplify procurement.
Which tests should bulk calcium carbonate pass?
Key tests include heavy metal limits (lead, arsenic, mercury), pH, loss on drying, and microbial counts. Particle size analysis and whiteness are also critical for toothpaste performance. Always verify that the material meets pharmacopoeia or food-grade standards where applicable.
How is bulk calcium carbonate packaged and stored?
It is usually supplied in 25 kg or 1000 kg woven bags with inner liners, and should be stored in a dry, cool place away from acids. Proper storage prevents caking and preserves flowability for manufacturing.
常见问题
Is toothpaste-grade calcium carbonate different from food-grade?
Yes, toothpaste grade often has tighter limits on particle size and abrasivity, plus stricter microbial controls. Food-grade material may not meet the low impurity and fine-grind requirements for oral care.
What particle size is best for toothpaste?
Most toothpastes use calcium carbonate with a median particle size between 1 and 15 microns. Smaller particles give a smoother feel but may reduce cleaning efficiency, so the optimal size depends on the formulation.
Can I get samples before ordering in bulk?
Most reputable suppliers offer small samples for testing and qualification. Always request a certificate of analysis with the sample to confirm key parameters like purity and heavy metal content.
