Find the LOT field
Look for the lot or batch field on the vial label. Copy the complete identifier, including any letters, numbers and separators. Use it to search the COA library.
Keep the label available while checking the result. A matching compound name is useful, but it is only one part of the comparison.
Compare the three places
Read the lot on the label, the lot on the batch record and the lot stated on the original certificate. Check that the identifiers connect to the same material.
If the report uses a different sample identifier, look for an explicit connection rather than assuming that two similar codes refer to the same batch.
Recognise a different kind of code
Report numbers, sample IDs and verification codes can look like lot numbers. A report number points to a document; a sample ID points to a laboratory submission. A verification code may open the issuing service’s copy of the result.
The role of each identifier should be clear from the record or certificate. If it is not, that is a specific question worth asking.
Keep the reference with your question
When contacting Pepline, include the compound, the lot on your label and the document you were reviewing. Describe exactly what does not match or what needs explaining.
You can browse the COA library without an account. The account preview also shows how saved records can stay close to your order information.
References & further reading
Vanguard Laboratory · Peptide testing methods and scope (opens a new tab)Pepline · Batch and label guideExternal educational references do not imply a Pepline laboratory affiliation. General information for laboratory research; not guidance for human or veterinary use.