ITEM | GB25548-2010 | FCC-V | E282 | ||
Appearance | White crystalline powder/White granular /white crystal | ||||
Smell | Without odor or with a slight propionic acid odor | ||||
assay (as dry basis) ≥ w% | 99.0 | 99.0-100.5 | 99.0 | ||
Insoluble in water ≤ w% | 0.30 | 0.20 | 0.30 | ||
PH (10% Aqueous Solution) | 7.0-9.0 | 7.5-10.5 | 6.0-9.0 | ||
Loss on drying ≤ w% | 9.5 | 5.0 | 4.0 | ||
Free acid ≤% | qualified | ------- | ------- | ||
Free alkalinity ≤% | qualified | ------- | ------- | ||
Heavy metals(as pb basis) ≤% | 0.001 | ------- | 0.001 | ||
Arsenic (As) ≤% | 0.0004 | ------- | 0.0003 | ||
Fluoride ≤% | 0.003 | 0.003 | 0.001 | ||
Lead(Pb) ≤% | ------- | 0.0002 | 0.0005 | ||
Magnesium ≤% | ------- | 0.40 | ------- | ||
Mercury(Hg) ≤% | ------- | ------- | 0.0001 | ||
Iron ≤% | ------- | ------- | 0.005 |