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Identifications | Standards |
Taste | Astringent |
Odor | Characteristic |
Proanthocyanidins | ≥95.0% UV |
OPCs (HPLC) | ≥70.0% |
Catechin (HPLC) | ≥6.0% |
Epicatechin (HPLC) | ≥4.0% |
Total Polyphenol | ≥95.0% |
Particle Size | ≥98%through 100 mesh |
Ash | ≤1.0% |
Loss on Drying | ≤5.0% |
Bulk Density | 0.35~0.65g/ml |
Tapped Density | 0.50~0.80g/ml |
PH(0.4% solution) | 2.4~2.5 |
Heavy Metals | ≤10mg/kg |
Pb | ≤1.0mg/kg |
As | ≤1.0mg/kg |
Hg | ≤1.0mg/kg |
Solvents Residue | |
Ethanol | ≤1000mg/kg |
Aerobic plate count | ≤1000CFU/g | GB 4789.2 |
Molds and Yeasts | ≤100CFU/g | GB 4789.15 |
E. coli | Negative/10 g | USP<2022> |
Salmonella | Negative/10 g | GB 4789.4 |

Appearance | Yellow brown to red brown fine powder |
Taste | sweet and refreshing |
Solubility | soluble in water |
Plant Source | Green tea leaves |
Active Ingredient | OPCs |
Function | Antioxidant |
Storage | Store in a dry, cool and dark place for 24 months |
Service available | * Granulating service * Formula service * HPMC capsule customization |
Packaging Details | 1kg Bag\\25kg Drum or Customized |













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