Green Tea Extract Powder Specification:Polyphenols 20%-98% EGCG 10%-95%,Catechins 10%-90% Excellent quality,competitive price Product Name: ... %, 90%, 95%, 98% UV 2. Catechins 10%, 15%, 20%, 25%, 30%, 40%, 50%, 60%, 65%, 70%, 75%, 80%, 90% HPLC 3. EGCG ... 20ppmArsenic(As)< 2ppmLead(Pb)< 2ppmAssayPolyphenols by UV> 95.0%Catechins by HPLC> 70.0%EGCG by HPLC> 40.0%Caffeine by HPLC< 5.0%Total Plate Count< ...