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Specification |
Feed grade |
Pharmaceutical grade |
Food grade |
Quality Standard |
Factory |
BP2013 |
FCC-IV |
Assay |
98-102% |
≥99.5% |
≥99% |
Loss on Drying |
≤0.5% |
≤0.5% |
≤0.5% |
Gallic acid |
≤1.0% |
≤0.5% |
≤0.5% |
Residue on ignition |
≤0.1% |
≤0.1% |
≤0.1% |
APHA |
≤50 |
≤50 |
≤50 |
Melting point |
148-150 |
148-150 |
148-150 |
Heavy metal |
≤20ppm |
≤10ppm |
≤10ppm |
Lead/pb |
5ppm max |
5ppm max |
2ppm max |
As |
3ppm max |
3ppm max |
3ppm max |
Hg |
1ppm |
1ppm |
1ppm |
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