Kaempferol was first extracted from Kaempferia galanga, a plant of the ginger family. It is also found in broccoli, tomatoes and beans. It is a light yellow crystal, slightly soluble in water, hot ethanol and ether. As a natural flavonoid compound, it has multiple biological activities such as anti-inflammatory, antioxidant and anti-tumor. It is often used in dietary supplements and medicines.
| Item | Spec. | Result | |
| Assay（By HPLC） | ≥98% | 98.13% | |
| Description : | |||
| Appearance | Fine Power | Complies | |
| Color | Yellow | Complies | |
| Odor | Characteristic | Complies | |
| Taste | Characteristic | Complies | |
| Extract Solvents | Water and Ethanol | Complies | |
| Physical &Chemical Control： | |||
| Loss on Drying | ≦2.0% | 1.52% | |
| Ash(Sulphated ash) | ≦2.0% | 0.78% | |
| Total Heavy Metals | ≦10ppm | 0.06ppm | |
| Arsenic(As) | ≦2ppm | 0.03ppm | |
| Lead(Pb) | ≦2ppm | 0.038ppm | |
| Mercury(Hg) | ≦1ppm | Complies | |
| Cadmium (Cd) | ≦1ppm | Complies | |
| Residual solvent | ≦5000ppm | Complies | |
| Residual Pesticides | ≦10ppb | Complies | |
| Microbiological Control ： | |||
| Total Plate Count | ≦1000cfu/g | Complies | |
| Total Yeast & Mold | ≦100cfu/g | Complies | |
| E.Coli | Negative/10g | Negative | |
| Salmonella | Negative/10g | Negative | |
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