Sodium fluorosilicate (based on dry) | 99.0% Min. |
Iron(Fe) | 0.02% Max. |
Free acid(based on HCI) | 0.1% Max. |
Water-insoluble matter | 0.50% Max. |
Loss on Drying at 105ºC | 0.3% Max. |
Sulphate(SO42-) | 0.25% Max. |
Chloride(as Cl-) | 0.15% Max. |
Iron(Fe) | 0.02% Max. |
Fineness(through 250μm test bolter) | 90% Min. |
Heave metal(based on Pb) | 0.01% Max. |