The Disguised Difference · Research quality
How to Read a Peptide Certificate of Analysis
Read a peptide COA by matching the sample first, then checking the method, result, units and report identity. The most useful report is the one that answers your project’s questions about the actual supplied batch. A large purity number is only one part of that review.
Start at the top of the report
Identify the issuing laboratory, report number, sample description and dates. Compare the product and batch information with the label. If the sample description does not distinguish the size or format you received, clarify that relationship before interpreting the results.
Read the result with its method
Check what the reported number measures. A percentage, a mass per container and a concentration are different quantities. Read the units and any qualifiers, limits or notes. A result cannot establish an attribute that was outside the test scope.
Verify and retain the source
Use the laboratory’s report-verification route when provided, or contact the laboratory through its official channel. Save the original report together with your batch record. For Disguised Alpha products, the COA portal is the starting point for locating available reports.
Common questions
What does an omitted test mean?
It means that the document does not provide that test result. Ask for additional records if the attribute matters to your project.
Is a supplier summary enough?
A summary can help navigation. Use the original report to review methods, qualifications and the complete result.