China Toothpaste Grade Precipitated Silica Powder, Find details about China Precipitated Silica, Hydrophobic Fumed Silica from Toothpaste Grade Precipitated Silica Powder
Items | HCP 921 | HCP 220C | HCP 600 |
Appearance | Super-fine Powder | Super-fine Powder | Micro pearl |
Heating loss (105°C) % | ≤ 5.0 | ≤ 5.0 | ≤ 5.0 |
Loss on ignition (1000±25°C)% | ≤ 8.5 | ≤ 8.5 | ≤ 8.5 |
DBP Oil Absorption Value cm3/g | 1.8-2.8 | 2.8-3.5 | 2.0-3.0 |
Silica(dry basis)% | ≥ 96 | ≥ 96 | ≥ 96 |
PH-value(10%aqueous solution) | 6.0-7.0 | 6.0-7.0 | 6.0-7.0 |
Heavy metal (Pb) mg/kg | ≤ 30 | ≤ 30 | ≤30 |
As mg/kg | ≤ 3.0 | ≤ 3.0 | ≤ 3.0 |
Pb mg/kg | ≤ 5 | ≤ 5 | ≤ 5 |
Na2SO4 % | ≤ 4.0 | ≤ 4.0 | ≤ 4.0 |
Average grain diameter d50 µm | 10-15 | 10-15 | 180-400 |
Items | HCP 260 | HCP 260P | HCP 200 |
Appearance | Micro pearl | Powder | Micro pearl |
Heating loss (105°C) % | ≤ 6.5 | ≤ 6.5 | ≤ 6.5 |
Loss on ignition (1000±25°C)% | ≤ 8.5 | ≤ 8.5 | ≤ 8.5 |
DBP Oil Absorption Value DBP cm3/g | 2.4-3.0 | 2.4-3.0 | 1.8-2.5 |
Silica(dry basis) % | ≥ 96 | ≥ 96 | ≥ 96 |
PH-value(10%aqueous solution) | 6.0-7.5 | 6.0-7.5 | 6.0-7.5 |
Heavy metal (Pb) mg/kg | ≤ 30 | ≤ 30 | ≤30 |
As mg/kg | ≤ 3.0 | ≤ 3.0 | ≤ 3.0 |
Cd mg/kg | ≤ 0.5 | ≤ 0.5 | ≤ 0.5 |
Pb mg/kg | ≤ 5 | ≤ 5 | ≤ 5 |
Na2SO4 % | ≤ 4.0 | ≤ 4.0 | ≤ 4.0 |
Average grain diameter d50 µm | 150-250 | 80-150 | 180-450 |