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Product specification | Excellent grade | Food grade | Industrial grade | |||
Appearance | white or slight yellow powder | white or slight yellow powder | white or slight yellow powder | |||
Assay % | ≥99.5 | ≥99.0 | ≥98.5 | |||
Chloride (Cl) % | ≤0.01 | ≤0.05 | ≤0.5 | |||
Fe % | ≤0.002 | ≤0.003 | ≤0.005 | |||
Heavy metal % | ≤0.002 | ≤0.003 | ≤0.005 | |||
Arsenic (As) % | ≤0.0003 | ≤0.0005 | ≤0.001 | |||
Residue on Ignition % | ≤0.05 | ≤0.1 | ≤0.15 | |||
Loss on dry % | ≤0.1 | ≤0.3 | ≤0.5 | |||
PH value (20% Aq. solution) | 10.5-11.0 | 10.5-11.0 | 10.5-11.0 | |||
Index of central control | ||||||
Whiteness % | ≥85 | ≥80 | 75-85 | |||
Transmission (15% solution) % | ≥95 | ≥90 | ≥85 | |||
Foreign substance detection | ≤1mm/10 | ≤1mm/10 | ≤1mm/10 | |||
Granularity (U.S.SCREEN) mesh | 95% pass 325-500 mesh | 90% pass 325-500 mesh | 85% pass 325-500 mesh | |||
Shelf life year | Two years | Two years | Two years |
Новинки товаров от производителей по оптовым ценам