Silica TP 28 for High Brasive Toothpaste Formulations
Chemical Properties
Silica TP 28 is a synthetic silica with superior abrasive power and compatibility with other ingredients.
Specifications
| Items | Unit | Specification |
| Appearance | – | White Powder, free of visible foreign matter |
| pH Value | 5% Slurry | 6.0-8.5 |
| Particle Size, pass on sieve 325% | – | ≥96 |
| Loss on Drying % in 105℃ | – | ≤10 |
| Loss on Ignition in 1000℃ | – | ≤8.5 |
| Sodium Sulfate (as Na2SO4+Nac) | % | ≤2.0 |
| Whiteness | – | ≥95 |
| Water Absorption | ml/20g | ≤30 |
| Purity of SiO2 | % | ≥96 |
| Iron as Fe | mg/kg | ≤350 |
| Sulfide | – | Negative |
| Heavy Metal as Pb | mg/kg | ≤15 |
| Arsenic | mg/kg | ≤3 |
| Total Aerobic Count | cfu/g | ≤200 |
| Mold & Yeast | cfu/g | ≤100 |
| Gram Negative Bacill | cfu/g | Not Detetive |
| Pseudomonas Aeruginosa | cfu/g | Not Detetive |
| S.aureus | cfu/g | Not Detetive |
| Oil Absorption Value | ml/100g | ≤150 |
| Apparent Density | g/m | ≥0.28 |
| Refractive Index | – | 1.435-1.046 |
| Light Transmittance | % | ≥90 |
| Friction Value 9000 Times of Copper Wear | – | 5-8mgCu(RDA120-180) |
Application
Silica TP 28 with high RDA value makes it suitable for those toothpaste formulations which demands high polishing level.
usage method : The transparent toothpaste can be compounded with thickened silica at the dosage of 15-20%.
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