Assay:(HPLC)

Emodin                    98% Min                          98.31%

Common Test:

Plant origin:               Polygonum cusPldatum

Extraction Part:             Root

Appearance:               Bisque powder                     Nearly Bisque Powder

Solubility:                soluble in Acetone, slightly soluble      Confirmed

                               in chloroform,aether

Absorption of

ultraviolet light             440nm                             Confirmed

Optical rotation             No rotation                         Confirmed

Melting point                       258℃ -259℃                       Confirmed

Lost on drying:              1% Max                           0.37%

Sulfated Ash:                0.5% Max                         0.24%

Heavy Metals:               10 ppm Max                       Confirmed

Arsenic(As):                 1 ppm Max                        Confirmed

Residual Ethyl Acetate:        1 ppm Max                        Confirmed

Microbiological:

Total Plate Count:             1000/g Max                      Confirmed

Yeast & Mold:                100/g Max                       Confirmed

E.Colt:                      Negative                         Not Detected

Salmonella                   Negative                         Not Detected

Storage:  Store in a cool and dry area, keep sealed and keep away from direct light

Shelf Life:  two years when stored properly(this is tentative)

Conclusion: this is to certify that we have inspected/tested the quality of the above mentioned material and found the result meet the standard as above.