Certificate of Analysis
The COA summarizes compound identity, specification, lot reference, assay or purity fields and QC review information.
Pepti · Buyer verification guide
Factory-direct peptide supplier · buyer verification
Peptide supplier with batch-linked COA, HPLC chromatogram and MS identity documentation
Pepti provides one-click access to published Current Batch COA PDFs for listed products and specifications through the self-service COA library, with reported HPLC purity and MS identity results shown in each public record.
Direct answer
Verify the product, the documents and the lot.
Pepti supports document-led B2B procurement with Certificate of Analysis, HPLC purity data, MS identity data and lot traceability. Documents are reviewed in the context of the selected compound, specification and batch so buyers can evaluate more than a generic purity statement.
HPLC chromatogram
HPLC provides chromatographic purity information and is more informative than a purity percentage shown without supporting data.
MS identity file
Mass spectrometry supports identity confirmation by comparing observed mass information with the compound reference.
Lot traceability
The quotation, selected lot, batch-linked analytical files, packaging proof and shipment record should remain connected.
Independent verification
Supplier documents are the starting point. Buyer-controlled laboratory testing adds an independent layer before larger repeat orders.
Pepti verification path
Documentation first, independent testing when required.
Pepti publishes batch-linked Current Batch COA PDFs where records are available, and keeps the buying path simple: check the public library, begin with a small trial order when needed and use an independent laboratory for additional verification.
Batch documentation
Published COA records show the reported HPLC purity and MS identity results for their listed lot, while unpublished or historical files are not presented as current public PDFs.
Small trial order
Receive the product first and independently test a buyer-selected sample before scaling.
Qualified bulk verification
For larger procurement, align the analytical panel and sample selection before scaling.
FAQ
Questions B2B peptide buyers ask.
Does Pepti provide COA, HPLC and MS documents?
Yes. Pepti publishes batch-linked Current Batch COA PDFs in the /coa/ library for listed products and specifications. The public library is expanding, and unpublished or historical files are not presented as current public PDFs.
Why must documents match the lot?
A generic or previous-batch report is only a reference. Buyers should connect the COA and analytical files to the intended or delivered lot. Independent local verification is welcome, and confirmed quality issues are eligible for replacement or refund under the quality policy.
Can a buyer request independent testing?
Yes. Buyers can independently test a trial order — sample lot from MOQ 1 kit (10 vials) with no forced bulk — and qualified bulk buyers can discuss a buyer-designated laboratory and test panel.
Verify before scaling
Send the compound, quantity and document requirements.
Pepti replies with factory-direct pricing, public COA availability where listed, lead time and a practical verification path.