Sb2O3% min | 99.9 | 99.9 | 99.8 | 99.5 | 99 | 98 | 96 | 95 | |
Máx. De As2O3% | 0.01 | 0.03 | 0.05 | 0.06 | 0.12 | 1.5 | 3.5 | 4.5 | |
PbO% máx | 0.01 | 0.05 | 0.08 | 0.1 | 0.2 | 0.04 | 0.08 | 0.1 | |
Fe2O3% máx | 0.001 | 0.002 | 0.005 | 0.006 | 0.02 | 0.005 | 0.006 | ||
CuO % máx | 0.001 | 0.002 | 0.002 | 0.006 | 0.001 | 0.002 | 0.002 | ||
Se % máx | 0.0005 | 0.002 | 0.004 | 0.005 | 0.002 | 0.004 | 0.005 | ||
brancura (mín.) | 97 | 96 | 96 | 95 | 91 | 97 | 96 | 95 | |
dimensão da partal (μm) | 0.3-0.7 | 0.3-0.7 | 0.6-0.9 | 0.9-1.6 | ≤ 0.4, ≤ 0.9, ≤ 1.6, ≤ 2.5 |