Zhuorui® brand natural Calcium Carbonate for toothpaste is obtained by mining,crushing, grinding and classifying high purity natural limestone benefited by air classification. It is produced as a fine, white, microcrystalline powder. It is made under strict control measures to insure that it meets the requirements of the Chinese QB/T2317-2012 for Natural Calcium Carbonate for toothpaste.
Molecular formula
CaCO₃
Molecular Weight
100.09
Quality
Conform to QB/T2317-2012 for Natural Calcium Carbonate for toothpaste.
|
Items |
Specification |
|
Appearance |
Fine white powder |
|
Fineness / % （325mesh） ≥ |
99.5 |
|
Water absorption /（mL/20g |
3.8～5.0 |
|
Volatiles（105℃） / % ≤ |
0.2 |
|
pH（25℃,5% Suspension） |
9.0～10.0 |
|
Whiteness （WG） ≥ |
98 |
|
Acid insoluble Substances / % ≤ |
0.05 |
|
Sulfide |
None |
|
Reductive sulfur /（mg/kg） ≤ |
5 |
|
Fluorine（F）/ % ≤ |
0.01 |
|
Iron / （mg/kg） ≤ |
200 |
|
Heavy metal (calculated by lead)（As Pb）/（mg/kg） ≤ |
15 |
|
Arsenic /（mg/kg） ≤ |
3 |
|
TPC / (CFU/g) ≤ |
200 |
|
Mould and Yeast /(CFU/g) ≤ |
100 |
|
Fecal coliform /g |
should not be detected |
|
Staphylococcus aureus /g |
should not be detected |
|
Pseudomonas aeruginosa /g |
should not be detected |
