Research notes
Read the paperwork, not the marketing.
Notes on sourcing and verifying research-grade compounds — what a certificate of analysis must show, what each test in a quality panel rules out, and how to confirm a result with the laboratory that issued it. Written from primary literature and published standards. For research use only.
Certificates of analysisA line-by-line guide to peptide COAs: what HPLC purity measures, why net peptide content differs from label weight, and how to verify a lot with the lab.Read the note →BPC-157How to read a BPC-157 certificate of analysis, what a third-party ISO 17025 panel actually tests, and how to verify a lot independently. Research use only.Read the note →TB-500TB-500 is a 7-residue fragment, not full thymosin β4 — a 4,000 Da difference. How to confirm which molecule a certificate of analysis actually describes.Read the note →IpamorelinIpamorelin's C-terminal amide sits about 1 Da from its free-acid impurity — why that matters on a certificate of analysis, and what to check on a lot report.Read the note →TesamorelinTesamorelin is an FDA-approved medicine sold as Egrifta. Research-supplied material is not that product — how identity is confirmed and what a COA must show.Read the note →MOTS-cMOTS-c contains two methionines and a tryptophan, so +16 Da oxidation peaks are an expected degradation signature — not a wrong product. How to read the COA.Read the note →GHK-Cu"GHK-Cu" covers at least four indexed species — free peptide, 1:1 and 2:1 copper complexes. Why a certificate must state stoichiometry, and how to read it.Read the note →SemaxSemax and N-acetyl Semax amidate are different compounds separated by about 41 Da. What a certificate of analysis must show to distinguish them.Read the note →SelankSelank is often supplied as a diacetate salt, so weighed mass exceeds the free-base figure. Why net peptide content matters and how to read a Selank COA.Read the note →
More notes are being published. For research use only — not for human or veterinary use.