CAS No.: | 7631-86-9 |
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Formula: | Sio2 |
EINECS: | 231-545-4 |
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Product Technical Specification
Prodct type |
Silicon Dioxide on Toothpaste Class (thickening) |
Silicon Dioxide on Toothpaste Class (friction) |
Silicon Dioxide on Toothpaste Class (mixed type) |
Appearance |
White powder |
White powder |
White powder |
PH value (5% water-solubility) |
5.5~7.5 |
6.5~8.5 |
6.5~8.5 |
Fineness % |
Get through 320 mesh screen ≥98 |
Get through 320 mesh screen ≥98 |
Get through 320 mesh screen ≥98 |
Loss on drying(105ºC)% |
≤10 |
≤10 |
≤10 |
Loss on ignition (900 ºC) % |
≤8.3 |
≤8.3 |
≤8.3 |
Sulfate % |
≤0.4 |
≤0.4 |
≤0.4 |
Chloride % |
≤0.1 |
≤0.1 |
≤0.1 |
WhitenessWG, % |
≥93 |
≥93 |
≥93 |
Soakage ml/20g |
54~60 |
17~20 |
30~42 |
Content of Sio2 % |
≥96 |
≥96 |
≥96 |
Iron% |
≤0.02 |
≤0.02 |
≤0.02 |
Refractive index (20ºC) |
1.435~1.460 |
1.435~1.460 |
1.435~1.460 |
Apparent densityg/ml |
0.15~0.20 |
≥0.30 |
≥0.30 |
Other heavy metals (Pb) mg/kg |
≤20 |
≤20 |
≤20 |
Arsenic mg/kg |
≤2 |
≤2 |
≤2 |
total number of bacteriaCfu/g |
≤200 |
≤200 |
≤200 |
The application of structure and granularity of silicon dioxide in toothpaste can be controlled depending on reaction condition. Its friction is also controlled. It can be produced into toothpaste which possesses cleaning power and does not harm dentin. Another feature of silicon dioxide is for making transparent toothpaste. Refractive index of silicon dioxide is from 1.43 to 1.45. When the refractive index of toothpaste which consits of water, sorbitol and glycerinum, is equal to silicon dioxide's, the toothpaste looks very transparent.
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