EGCG 98% buyers should compare HPLC assay, COA fields, sample performance and RFQ details before approving a bulk quotation.
EGCG 98% HPLC and COA Sourcing Overview
This guide supports B2B teams sourcing high-purity EGCG powder from green tea. It focuses on specification review, assay method questions, COA structure, sample testing and quotation preparation. For the product identity, request path and bulk supply discussion, start with the EGCG 98% supplier page.
EGCG 98% should not be handled as the same sourcing task as a broad green tea extract. A standard green tea extract project may focus on catechins, tea polyphenols, caffeine direction or application fit, while an EGCG 98% project usually needs tighter assay review and a clearer batch document trail.
Specification Points to Confirm Before Quotation
| Review area | What to confirm | Why it matters for sourcing |
|---|---|---|
| Ingredient identity | Confirm EGCG 98% grade, source direction and supplier item name. | Keeps quotations, samples and COA files aligned. |
| Assay method | Ask how EGCG content is tested and how results are reported. | Helps QA teams compare documents across suppliers. |
| Appearance | Review powder color, odor notes and visible consistency. | Supports incoming material checks and sample records. |
| Physical parameters | Confirm particle size, moisture and packing notes where available. | Supports blending, filling and handling review. |
| Quality limits | Review microbiology, heavy metals and other required COA fields. | Supports buyer document approval before order release. |
| Commercial terms | Confirm MOQ, sample availability, lead time, packaging and destination-market document needs. | Reduces late-stage mismatch between technical and purchasing teams. |
EGCG 98% vs Green Tea Extract Powder
| Dimension | EGCG 98% | Green Tea Extract Powder |
|---|---|---|
| Main sourcing use | High-purity EGCG ingredient projects with specific assay expectations. | Broader tea extract projects that may focus on catechins, tea polyphenols, caffeine target or application fit. |
| Best starting page | EGCG 98% product page. | Green Tea Extract product page. |
| Document focus | HPLC assay, EGCG result, batch COA and specification match. | Catechin profile, caffeine direction, assay target, COA and formulation notes. |
| Sample review | Confirm appearance, flowability, batch traceability and document match. | Confirm application fit, color, taste direction, solubility or blending behavior depending on the project. |
How to Review an EGCG 98% COA
Before approving a sample, compare the COA with the specification sheet and quotation line. The item name, grade, batch number and assay result should tell the same story. If the buyer requires a specific assay method or result format, it should be confirmed before the supplier prepares the sample or quotation.
- Check whether the COA clearly names EGCG 98% and lists the batch number.
- Review the assay method and result format before comparing suppliers.
- Confirm whether microbiology, heavy metals, moisture and other required fields are included.
- Match the sample label and COA batch information in the buyer’s internal file.
- Request clarification when a document field does not match the specification sheet or quotation record.
Sample Testing and RFQ Workflow
EGCG sample testing should be tied to the buyer’s actual finished-product format. A sourcing team may approve documents first, while a formulation team checks handling, blending behavior, color impact and process fit. Both reviews should be connected before a bulk purchase order is released.
- Define the target grade and assay expectation.
- Request specification, representative COA, available SDS or MSDS file and packing notes.
- Confirm sample quantity, sample label format and intended test matrix.
- Record sample feedback, document review notes and quotation assumptions together.
- Before bulk order, confirm commercial batch COA, packing size, MOQ, lead time and shipment route.
Choose the Right Product Page
Use EGCG 98% for High-Purity EGCG Projects and Green Tea Extract for Broader Tea Extract Briefs
If the RFQ specifies EGCG 98%, continue to the EGCG 98% supplier page. If the brief is broader, compare the Green Tea Extract supplier page for catechin, caffeine and formulation-fit options.
FAQ: EGCG 98% HPLC and COA
Review the assay method, EGCG result, batch number, specification limits, microbiology, heavy metals, moisture and whether the COA matches the quoted grade and sample label.
Many B2B buyers request HPLC-based assay information for high-purity EGCG projects. The exact method and result format should be confirmed with the supplier before sample approval.
No. EGCG 98% is better handled through the EGCG product page, while broader catechin or tea polyphenol projects can start from the green tea extract product page.
Send the target grade, assay expectation, application format, required documents, sample quantity, destination market, packaging preference, MOQ expectation and annual demand estimate.
Request EGCG 98% Specification, COA and Samples
To request EGCG 98% sourcing support, share the target grade, application format, required documents, sample quantity, destination market, packaging preference, MOQ expectation and annual demand estimate. Contact HERBSEA to confirm sample availability and quotation details.