Quality Index | Super Tiny Grade | Medicine Grade | Industrial Grade | ||
Best- Class | First- Class | Second- Class | |||
Content %≥ | 97 | 99 | 98 | 97 | 90 |
Free Nitric Acid %≤ | 0.4 | 0.25 | 0.3 | 0.5 | 4.0 |
Moisture Content %≤ | 0.3 | 0.3 | 0.3 | 0.5 | 1.0 |
Insoluble in Water %≤ | 1.5 | 0.05 | 0.05 | 0.1 | 0.2 |
Sio2 Content % | 0.5--0.9 | ||||
Granularity Range≤ | 14μm (98%at 5--25μm) | ||||
D50 Value | 4.5--6.5μm |
Appearance: White or cream-coloured crystalline powder or particle. | ||
Character: Oxidation, toxic, decomposed and explosive under high temperature. | ||
Melting Point: 214-21 |