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Guides
Peptide classes and where they come from, trade names and chemical names, sequences and masses side by side, CAS numbers that differ between listings, and how to read a batch COA.
A widely cited review groups topical peptides into four classes. Which peptides in our catalogue sit in which class, on what source, and what the class does not tell you about a vial.
Updated October 9, 2026 · 6 min read
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ComparisonAcetyl Octapeptide-3 and Acetyl Hexapeptide-8 share six residues and differ by two. Their sequences, formulas and masses side by side, how the MS result tells them apart — and how Palmitoyl Pentapeptide-4 differs from both.
Updated October 9, 2026 · 5 min read
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ComparisonSYN®-AKE is a small peptide derivative supplied as a diacetate salt; SNAP-8® and Argireline® are acetylated oligopeptides. What that means for the formula, the mass and the MS result.
Updated October 9, 2026 · 5 min read
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ComparisonThree trade names from one owner, three different chemistries: one palmitoylated pentapeptide, a two-peptide material and a palmitoylated tripeptide. Chemical names, sequences and CAS numbers side by side.
Updated October 9, 2026 · 4 min read
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Names & identityCustomers ask for SNAP-8®, Argireline® or Matrixyl®; listings use chemical names, sequences and CAS numbers. One table to match them, plus the older names still in circulation.
Updated October 9, 2026 · 4 min read
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QualityWhat each line of a batch certificate of analysis tells you, how to match the COA to the vials you received, and what to compare it with on the product page — with Acetyl Octapeptide-3 as the example.
Updated October 9, 2026 · 5 min read
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Names & identitySalt forms, metal complexes, two-peptide materials and superseded registry numbers: five reasons two listings of the same peptide show different numbers, with examples from our catalogue.
Updated October 9, 2026 · 5 min read
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