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Analysis Contents      Analysis Standard        Analysis Results

Characteristics:        White Crystalline Powder   Pass

Identification          Positive reaction          Positive reaction

Melting point           About 190??                191??

PH                       2.1~2.6                   2.4

Clarity of solution      Clear                     Pass

Colour of solution       ?üBY7                                           < BY7   

Copper                   ?ü5ppm                    <5ppm

Heavy metals             ?ü10ppm                   <3ppm

Iron                     ?ü2ppm                    <2ppm

Oxalic acid              ?ü0.2 %                   <0.2%

Sulphate ash             ?ü0.1%                    <0.1%
(Residue on ignition)         

Specific optical rotation  +20.5??-  +21.5??       +21.2??

Assay                      99.0-100.5%             99.72%

Organic volatile impurities    Pass                Pass