Appearance: Grey-white powder
Purity(HPLC): 98.5%min.
Content (341 ) : 85% min.
Content (319 ) : 80% min.
Chromotropic acid: 0.5% max.
W acid: 0.15%max.
T acid: 0.25%max.
K acid: 0.05%max.
Total organic insoluble matter: 1.5% max.
Alkali insoluble matter: 0.1% max.
Packing: 25kg /bag
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