a) Specifications:
Appearance---White powder
Content (HPLC)---99.0% min
Melting range---199-203℃
Residue on ignition---0.1% max
Free Gallic Acid---0.5% max
Loss on drying---0.5% max
Fe---3ppm max
Na---3ppm max
Arsenic---3ppm max
Heavy metal---10ppm max
FCCIV & EG-DJK Standards
b) Specific grade |
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