Polygonum cuspidatum Sieb. et Zucc. has the effects of detoxifying, relieving pain, relieving cough and reducing phlegm.It is a traditional Chinese medicine.
Polydatin is a substance that combines resveratrol with glucose.It is extracted from the dried rhizome of the traditional Chinese medicine Polygonum cuspidatum and is one of the main active ingredients.
It appears as a white needle-shaped crystalline powder. It is slightly soluble in water and ethyl acetate, and easily soluble in methanol and ethanol.
In the 2020 edition of the "Pharmacopoeia of the People's Republic of China", the content of rhubarb and polydatin is used as the quality standard of Polygonum cuspidatum.
| Items | Specification | Results |
| Assay(Polydatin ) | ≥98.0% | 98.65% |
| Physical & Chemical Control | ||
| Identification | Positive | Complies |
| Appearance | White Powder | Complies |
| Odor | Characteristic | Complies |
| Mesh Size | 80 mesh | Complies |
| Loss On Drying | ≤5.0% | 2.27% |
| Methanol | ≤5.0% | 0.024% |
| Ethanol | ≤5.0% | 0.150% |
| Residue on Ignition | ≤3.0% | 1.05% |
| Heavy Metal Testing | ||
| Heavy Metals | ＜20ppm | Complies |
| As | ＜2ppm | Complies |
| LEAD(Pb) | < 0.5PPM | 0.22 ppm |
| MERCURY(Hg) | Not dectect | Complies |
| CADMIUM | < 1 PPM | 0.25 ppm |
| COPPER | < 1 PPM | 0.32 ppm |
| ARSENIC | < 1 PPM | 0.11 ppm |
| Microbiological | ||
| Total Plate Count | <1000/gMax | Complies |
| Staphylococcus Aurenus | Not Detected | Negative |
| Pseudomonas | Not Detected | Negative |
| Yeast & Mold | <100/gMax | Complies |
| Salmonella | Negative | Negative |
| E. Coli | Negative | Negative |
Compared with resveratrol, polydatin has more glycoside groups in its structure and is more stable than resveratrol.
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