Gangxia, Donggang Town, Xishan District
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| Grade | Medical grade | Feed grade | Industrial garde |
| Standard | USP-34 | GB25542-2010 | YotechStandard |
| Assay % | 98.5-101.5 | ≥99.0 | ≥98.5 |
| Loss on drying % | ≤0.2 | ≤0.2 | ≤0.5 |
| Heavy metal % | ≤0.002 | ≤0.002 | ≤0.003 |
| Chlorid(Cl) % | ≤0.007 | ≤0.4 | ≤0.5 |
| Ignition residue % | ≤0.1 | ≤0.1 | ≤0.1 |
| Sulphate(SO42-) % | ≤0.0065 | ≤0.007 | ≤0.01 |
| Iron(Fe) % | ≤0.001 | ≤0.003 | ≤0.003 |
| Ammoniumsalt(NH4 ) % | ≤0.01 | ≤0.02 | ≤0.02 |
| Arsenic(As) % | ≤0.0001 | ≤0.0003 | ≤0.0005 |
| Lead(Pb) % | ≤0.0001 | ≤0.0005 | ≤0.0005 |
| PH(5%) % | ≤5.5-7.0 | ≤5.5-7.0 | ≤5.5-7.0 |