| Item | Standard | Results | |
| Appearance | White powder | White powder | |
| SiO2 content(on dry basis) % | ≥97.0 | 97.4 | |
| Loss on heating (%) | ≤6.5 | 5.2 | |
| Loss on ignition (%) | ≤8.5 | 4.2 | |
| Pb (mg/kg) | <5 | <1 | |
| As (mg/kg) | <3 | <1 | |
| Heavy Metal (mg/kg) | <30 | <10 | |
| Cd (mg/kg) | <0.5 | N.D | |
| Salt as Na2SO4 (%) | ≤2.5 | <1.0 | |
| PH value | 6.0-7.5 | 6.7 | |
| Specific Surface Area (m²/g) | 200-250 | 214 | |
| DBP(oil absorption value) cm³/g | 2.40-3.00 | 2.45 | |
| Bulk density (g/cm³) | 0.20-0.25 | 0.22 | |
| Particle size (D50) μm | 100-150 | 140 | |
