Live evidence coverage
Testing transparency
25 released lot records currently represented across 20 catalog compounds.
Review live coverage →Analytical guides and testing transparency
Understand analytical methods and review lot-specific testing evidence.
Methods
Read the analytical record
Analytical guide
How to read a peptide Certificate of Analysis
A useful COA identifies the sample or lot, laboratory, analytical date, methods, and reported results. Match the lot on the received vial to the certificate; a catalog-wide purity claim is not a substitute for batch-specific evidence.
Read guide →Analytical guide
What HPLC purity does—and does not—show
No. HPLC separates detected components under a stated method and reports relative peak area. It can support a purity assessment, but molecular identity requires separate evidence and the result applies to the analyzed sample, not every batch.
Read guide →Analytical guide
Mass spectrometry and peptide identity
Mass spectrometry compares observed mass-to-charge signals with the expected molecular mass. It can support identity, but it does not by itself quantify chromatographic purity, sterility, endotoxin, or net peptide content.
Read guide →Editorial boundary
References describe published research, not Astral product performance. Product identity, purity, and other attributes must be evaluated against the released lot certificate. Read the source policy.