"A practical supplier guide to Argireline (CAS 616204-22-9 / Acetyl Hexapeptide-8): what the freeze-dried anti-wrinkle peptide is (C34H60N14O12S, MW 889, white to slightly yellow solid, -20 C storage), how its SNAP-25 mechanism softens expression lines, typical 2-10% use levels in water-phase serums, smart pairings with GHK-Cu, squalane, kojic acid, alpha-arbutin, vitamin C and mild surfactants, plus handling, storage and buyer COA notes."
-Deshangchemical-chemechemi
Argireline (CAS 616204-22-9): The Anti-Wrinkle Peptide That Softens Expression Lines Without Needles
If you formulate anti-aging skincare, you have almost certainly seen the name Argireline on an active ingredient list. In technical files it appears as Acetyl Hexapeptide-8 (the supplier page also lists it as acetylhexapeptide-3), with CAS 616204-22-9. It is one of the few cosmetic peptides that target expression lines directly — the creases that show up around the eyes and forehead when we frown, squint, or smile — and it does so from the outside in, without an injection. For a contract manufacturer or private-label brand, that positioning is exactly why the material keeps showing up in serums, eye creams, and leave-on treatments.
What the material actually is
Argireline is a synthetic hexapeptide. The spec sheet on our product page lists the identifying data a buyer needs before quoting or sampling:
| CAS | 616204-22-9 |
| Molecular formula | C34H60N14O12S |
| Molecular weight | 889 |
| Form | lyophilized solid (freeze-dried powder) |
| Color | white to slightly yellow |
| Storage | −20 °C recommended; protect from light and moisture |
As a lyophilized solid it ships and stores as a stable powder; most finished-product houses either reconstitute it into water/glycerin or buy it pre-dissolved. The white-to-slightly-yellow appearance is normal for the material, and a COA from the supplier should confirm identity and purity before any production batch is released.
How it works — the short, honest version
The reason Argireline is described as a "topical alternative" to wrinkle-relaxing injections is its mechanism. It is a fragment of the SNAP-25 protein. In normal skin signaling, SNAP-25 is part of the SNARE complex that lets neurotransmitter vesicles fuse with the nerve ending and release acetylcholine, which is what tells a facial muscle to contract. Argireline competes with native SNAP-25 for a place in that complex. With the complex partially disrupted, less acetylcholine is released, the muscle under the expression line relaxes modestly, and over repeated use the depth of dynamic wrinkles — especially around the eyes (crow's feet) and across the forehead — appears reduced.
This is a softening effect, not a freezing one. Formulators should set expectations with customers accordingly: Argireline works on expression lines caused by repeated muscle movement, and it performs best as part of a consistent daily regimen rather than as a one-time treatment.
Where it goes in the formula
Typical use levels run around 2–10% of the peptide in the finished product, depending on whether you are working from the solid or from a ready-made aqueous solution (commercial Argireline solutions are often supplied at 5–10% in water/propylene glycol). It is water-soluble, which makes it easy to build into water-phase serums, gels, essences, and emulsions. Because it is a peptide, it is happiest in a formula with a sensible pH (close to skin, roughly 5–6.5) and is best added after the heated phase has cooled. A chelator and a mild preservative system keep the water phase clean; a small amount of Citric Acid Anhydrous (CAS 77-92-9) is the standard way to land the pH without introducing color or odor.
Pairing it with other actives
Argireline rarely works alone in a premium anti-aging product. It pairs cleanly with actives that address different parts of the aging story:
GHK-Cu Copper Peptide (CAS 49557-75-7) — a signal peptide aimed at firmness and repair; the two cover "relax" and "rebuild" in one formula.
Squalane (CAS 111-01-3) — the emollient carrier that improves slip and helps the water-phase active sit on the skin instead of evaporating.
Kojic Acid (CAS 501-30-4) and Alpha-Arbutin (CAS 84380-01-8) — brightening actives that share the leave-on serum format, so a single product can address both tone and lines.
L-Ascorbic Acid (CAS 50-81-7) — vitamin C antioxidant support that helps protect the formula and the skin barrier.
Sodium Lauroylsarcosinate (CAS 137-16-6) — a mild amino-acid surfactant for the cleanser step that precedes a peptide serum.
None of these compete with Argireline's mechanism, which is why it is a flexible building block in both minimalist "peptide only" serums and fuller anti-aging stacks.
Handling and storage notes for the lab
Because the material is supplied as a lyophilized solid, keep it sealed and cold. We recommend −20 °C storage for the powder, with protection from light and humidity; once reconstituted, treat the solution as a perishable and work it into the batch promptly. Standard peptide hygiene applies: clean glassware, low-heat addition, and a preserved, properly buffered water phase. For finished goods, a stability check at the intended pH and packaging is worth running before scale-up, since peptides can lose activity in aggressive or very alkaline systems.
What to check before you buy
When you request a quote, ask for the COA (identity by NMR/MS, assay, and microbiology), the pack size, and the lead time. For cosmetic-grade supply you want a supplier who can show consistent assay and batch traceability, plus the documentation your QA team needs for a finished-product filing. We hold cosmetic-grade Argireline and can provide sample packs for formulation trials.
For the active itself, see the Argireline product page for current assay, pack size, and COA details. If you are building an anti-aging line and want to discuss use levels, stability, or a paired peptide/emollient system, our team can help you spec the combination.
