So far, Q&C has been achieving great progress in oral-care silica, successfully developed Dental Thickener Silica(DT) and Dental Abrasive Silica(DA).
Product Series | Dental Abrasive Silica | Dental Versatile Silica | Dental Thickener Silica | ||
Type | AFSIL? DA70 | AFSIL? DA100 | AFSIL? DV175 | AFSIL? DT220 | |
Whiteness | % | ≥96 | ≥96 | ≥96 | ≥96 |
Loss on Ignition（1000℃） | % | ≤8.5 | ≤8.5 | ≤8.5 | ≤8.5 |
Loss on Drying （105℃） | % | ≤10 | ≤10 | ≤10 | ≤10 |
pH（5% Aqueous Solution） | 6.5-8.5 | 6.5-8.5 | 6.5-8.5 | 6.5-8.5 | |
Total Salts(Na2SO4+NaCl) | % | ≤2 | ≤2 | ≤2 | ≤2 |
SiO2 Content | % | ≥96 | ≥96 | ≥96 | ≥96 |
Fe Content | mg/kg | ≤350 | ≤350 | ≤350 | ≤350 |
Pass on Sieve 325 | % | ≥98 | ≥98 | ≥98 | |
Water Absorption | ml/20g | 8-16 | 17-23 | 30-36 | 43-58 |
Oil Absorption | ml/100g | ≤120 | ≤120 | 150-200 | ≥220 |
Apparent Density | g/ml | ≥0.4 | ≥0.3 | 0.2-0.3 | ＜0.2 |
Refractive Index | / | / | 1.435-1.460 | 1.435-1.460 | 1.435-1.460 |
Transparent Index | % | / | ≥90 | ≥90 | ≥90 |
Heavy Metal as Pb | mg/kg | ≤15 | ≤15 | ≤15 | ≤15 |
Arsenic | mg/kg | ≤2 | ≤2 | ≤2 | ≤2 |
Aerobic Bacterial Count | cfu/g | ≤200 | ≤200 | ≤200 | ≤200 |
Mold & Yeast | cfu/g | ≤100 | ≤100 | ≤100 | ≤100 |
Thermotolerant Coliform | cfu/g | Negative | Negative | Negative | Negative |
Pseudomonas Aeruginosa | cfu/g | Negative | Negative | Negative | Negative |
Staphylococcus Aureus | cfu/g | Negative | Negative | Negative | Negative |