Character & Purpose: White granular, easily soluble in water, soluble is alkalic. Mainly used as aids of washes and metal cleaner, also used in permutite, paper bleaching and cotton cooking.
Packing: 25KG PP/PE BAG
Formula: Na2SiO3·5H2O
Standard: HG/T2568—94Ⅰ
| Item | Spec.I | Typical results | |
| Total Alkalinity (as N a2O) /% | 28.5+/-0.7 | 29.1 | |
| Silicon Dioxide content (SiO2) /% | 28.8+/-0.7 | 29.2 | |
| Iron content (as Fe) /% | 0.03Max. | 0.005 | |
| Water-insoluble matter /% | 0.03Max. | 0.006 | |
| Whiteness | 75Min. | 81 | |
| PH Value | 12.5+/-0.3 | 12.6 | |
| Loss on Ignition/% | 43.0+/-1.0 | 43.2 | |
| Particle Size | >1250um | <2% | 0 |
| 630~1250um | 50~80% | 65% | |
| 180~630um | 20~50% | 34% | |
| <180um | <2% | 1% | |