Purity, (dried) %≥96.0
Drying loss, %≤5
Ignition loss,%≤8.5
Heavy metal, (Pb) %≤0.003
Pb, %≤0.001
As, % ≤0.0003
Soluble salts, (Na2So4) %≤4
Appearance: Anhydrous, light, white powder. Odorless.
Particle size: 100% through 100 mesh sieve.
Solubility: Insoluble in acid; soluble in hot alkali solution.
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