Product Series | industrial Grade | ||||
Type | H-325D | H-325K | H-325 | H-180 | |
Form | Powder | Micro-pearl | Powder | Super-fine powder | |
Silica(dry basis) | % | ≥99 | |||
Drying Loss | % | ≤6.0 | |||
Ignition Loss (dry basis) | % | ≤5.0 | |||
Soluble salts (As Na2SO4) | % | ≤3.0 | ≤3.0 | ≤3.0 | 2.5≤3.0 |
pH(10% aqueous solution) | 6.0~7.5 | ||||
DBP | cm3/g | 2.5~2.8 | 2.0~3.0 | 2.6~2.8 | 2.5~3.5 |
Fe | (mg/kg) | ≤100 | ≤300 | ≤300 | ≤300 |
Average particle size/D50 | um | 40-60 | 10-30 | 40-60 | 5~15 |
BET | m2/g | 160~180 | 160~180 | 160~180 | 180~200 |
Heavy Metal (in form of Pb) | mg/kg | ≤0.003 | |||
As | % | ≤0.0003 | |||
pb | % | ≤0.001 |