Green tea extract catechin projects need a clear COA and assay marker checklist before sample approval.
Green Tea Extract Catechins COA Specification Guide
This guide helps sourcing and quality teams compare green tea extract catechin specifications for B2B formulation projects. The Green Tea Extract product page remains the main page for quotation, sample request, packing and MOQ. This page focuses on catechin marker selection, COA fields and document review.
Catechin briefs should be precise. Some buyers ask for tea polyphenols, some ask for total catechins, and some name EGCG as a separate high-purity route. The supplier discussion should start with the marker target before sample approval.
Catechin Specification Fields
| Field | What to confirm | Why it matters |
|---|---|---|
| Marker target | Tea polyphenols, total catechins, EGCG or buyer-defined marker. | Defines the right product grade. |
| Assay method | Ask how the marker is tested and how results are reported. | Supports supplier comparison and QA review. |
| COA format | Check batch number, result values, specification limits and release date. | Connects the document to the sample batch. |
| Caffeine direction | Confirm standard, low-caffeine or decaffeinated direction where needed. | Can change the suitable grade and support page. |
| Physical fit | Review appearance, particle size, flowability and packing notes. | Supports capsule, tablet, powder blend and beverage trials. |
| Quality fields | Review microbiology, heavy metals, moisture and buyer-required fields. | Supports internal document approval. |
Catechins vs EGCG 98% vs Caffeine-Specified Extract
| Buyer task | Best starting page | Document focus |
|---|---|---|
| Broad catechin or tea polyphenol brief | Green Tea Extract product page. | Catechin marker, COA, assay method and sample fit. |
| High-purity EGCG brief | EGCG 98% HPLC COA guide. | EGCG result, HPLC assay and batch document trail. |
| Caffeine-sensitive brief | Caffeine specification guide. | Caffeine target, assay method and COA review. |
COA Review Workflow
- Define the target marker before requesting samples.
- Ask for a specification sheet and representative COA.
- Match sample label, batch number and COA file in the same project folder.
- Compare assay result, microbiology, heavy metals, moisture and required fields.
- Before bulk order, confirm commercial batch COA, packing size, lead time and shipment route.
Product Page Path
Use Green Tea Extract for Broad Catechin Briefs and EGCG 98% for High-Purity EGCG
Start from the Green Tea Extract product page. If the brief names EGCG 98%, compare the EGCG 98% HPLC COA guide before RFQ.
FAQ: Green Tea Extract Catechins COA
Review the marker target, assay method, batch number, result format, microbiology, heavy metals, moisture and whether the values match the specification sheet.
No. EGCG can be one catechin marker, but some projects use broader catechin or tea polyphenol targets. The RFQ should name the exact marker expectation.
Use the Green Tea Extract product page for the main RFQ path and this guide for catechin COA and specification review.
Yes when the buyer brief includes a caffeine direction. Use the caffeine specification guide when caffeine is a decision factor.
Request Green Tea Extract Catechin Specifications
To request catechin-focused green tea extract sourcing support, share the marker target, assay expectation, application format, document list, sample quantity, destination market, packing preference and annual volume. Contact HERBSEA for COA, specification, sample and quotation details.