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| ITEMS | STANDARDs |
| Appearance | White or whitelike powder |
| Assay | >=50% |
| Loss on Drying | =<5.0% |
| Seive Analysis | >=90% through No. 20 (US) |
| Heavy Metal | =<10mg/kg |
| Arsenic | =<2mg/kg |
| Pb | =<2mg/kg |
| Cadmium | =<2mg/kg |
| Mercury | =<2mg/kg |