产品描述

Appearance    White crystalline powder
Identification    Positive reaction
Melting point    About 190 oC
Specific rotation    +20.5 --- +21.5 o
PH value    2.1 - 2.6
Clarity of solution    Clear
Colour of solution    BY7 max
Heavy metals    10 ppm max
Copper    5 ppm max
Iron    2 ppm max
Assay(on dried basis)    99.0 - 100.5%
Residue on ignition    0.1% max
Organic volatile impurities    Conforms
Oxalic Acid    0.2% max