Chinese Gallnut Extract, also referred to as Chinese gall (or nutgalls), is a plant excretion produced when irritants are released by the larvae of gall insects, such as those of the Cynipidae family, the gall wasps. A major commercial source of medicinal gallnuts is oak trees, which yield the Chinese herb moshizi, but a similar material is found on Chinese sumac (Rhus species), produced by the activities of a type of aphid; these galls are called wubeizi by Chinese herbalists. The plant secretes the liquid gall, comprised mainly of tannins, that hardens to become the "nut."
| ITEMS | TANDARDS | RESULTS |
| Odor | Characteristic | Complies |
| Description | Brown yellow powder | Complies |
| Mesh Size | 100mesh | 98% |
| Sulphated Ash | Max5.0% | 3.65% |
| Loss on Drying | Max 5.0% | 3.45% |
| Bulk Density | 65-75g/100ml | 68g/100ml |
| Test method | UV | |
| Assay | Gallic acid, Ellagic acid,Tannic Acid | |
| Heavy Metal | Max 20ppm | 6.1ppm |
| Pb | Max 2ppm | 0.6ppm |
| As | Max 2ppm | 0.55ppm |
| Hg | Max 2ppm | 0.35ppm |
| Cr | Max 2ppm | 0.30ppm |
| Residue on Menstruum | Max 50ppm methanol/acetone | Negative |
| Residue of Pesticide | Max 2ppm | Negative |
| Total Plate Count | Max 10000cfu/g | 9600 |
| Yeast&Mold | Max 300cfu/g | 270 |
| E.coil | Negative | Complies |
| Salmonella | Negative | Complies |
| Specification | 10:1 | |