What is the SNAP-8 peptide?
SNAP-8 is the trade name for acetyl octapeptide-3, a synthetic cosmetic peptide made of eight amino acids. Its sequence is written Ac-Glu-Glu-Met-Gln-Arg-Arg-Ala-Asp-NH2: the ends are capped with an acetyl group and an amide, which is where the “acetyl” in the ingredient name comes from. The design is modeled on a short fragment of SNAP-25, a protein found in nerve endings, which is where the “SNAP” name comes from. The SNAP 8 peptide is found in skincare, not in injectable vials.
Acetyl octapeptide-3 is formulated into topical products, most often a SNAP 8 serum, cream or eye product, and appears on ingredient lists under its INCI name, acetyl octapeptide-3. This page explains the product form, how label strength is written and how it relates to similar cosmetic peptides. It makes no claims about effects on skin.
Can you mix SNAP-8 with BAC water?
SNAP-8 is not an injectable, so the question of reconstituting it with bacteriostatic water does not arise. BAC water is used to dissolve freeze-dried powders in sealed vials that are meant to be drawn into a syringe. The SNAP 8 peptide is a cosmetic ingredient intended for products applied to the skin, and it is not for injection.
Finished serums and creams already contain the peptide at the strength the manufacturer chose, so there is nothing to mix. Some suppliers also sell raw acetyl octapeptide-3 as a powder or concentrated solution for cosmetic formulating; that is an ingredient for making a topical product, not a vial for syringe use. With no injectable vial and no syringe, there is no U-100 unit math, which is why the calculator on this page is greyed out. For what bacteriostatic water is actually used for, see our BAC water guide.
Reading SNAP-8 serum labels: percentages
Topical products state strength differently from vials. Instead of mg in a vial, a SNAP 8 serum usually gives a percentage. The pure unit facts that make these readable:
- Percent by weight: 1% means 1 g of an ingredient per 100 g of product, which is the same as 10 mg per gram.
- Ingredient solution vs pure peptide: cosmetic peptides are often supplied to manufacturers as a dilute solution. A percentage on a label can refer to that solution rather than to pure acetyl octapeptide-3, and labels do not always say which.
- Ingredient list order: ingredients are listed roughly in descending amount, so position gives a rough idea of how much is present when no percentage is stated.
Because of the solution-versus-peptide difference, two products showing the same percentage are not necessarily the same strength. Compare the wording on each label rather than the headline number alone.
SNAP-8 vs Argireline
The comparison people search for most is snap 8 vs argireline. Argireline is the trade name for a six-amino-acid peptide originally listed as acetyl hexapeptide-3 and now also listed as acetyl hexapeptide-8. SNAP-8 is an extended version of the same sequence: it adds two amino acids to the Argireline chain, making an octapeptide instead of a hexapeptide.
Both are cosmetic ingredients for topical use, both are sold in serums and creams, and both are often combined in the same formula. The difference that matters on a label is simply the name: acetyl hexapeptide-3 or -8 for Argireline, acetyl octapeptide-3 for SNAP-8. This page does not compare them for results.
SNAP-8 and other cosmetic peptides
SNAP-8 sits in a wider group of peptides found in skincare. The best known is copper tripeptide, which is sold both in topical products and as research vials. The GHK-Cu page covers the vial form, with a BAC water mixing chart and a preselected calculator, because research GHK-Cu vials are reconstituted the same way as other peptides.
That is the key distinction for this site. When a peptide is sold as a freeze-dried vial, the calculator converts an amount you already have into syringe units. When it is sold as a finished topical, as SNAP-8 almost always is, the label percentage is the only strength figure, and there is nothing to convert. This site does not set or suggest amounts for either form.
Regulatory status of SNAP-8
Acetyl octapeptide-3 is a cosmetic ingredient, not an FDA-approved drug. Cosmetics in the United States do not go through drug approval, and products containing SNAP-8 are sold as cosmetics for topical use. It is not intended or labeled for injection.
Because it is a topical ingredient rather than a reconstituted vial, SNAP-8 sits outside the calculators on this site. For peptides that are sold as freeze-dried powder and need BAC water math, browse the peptide library, where each page includes a mixing chart and a calculator.
SNAP-8 (Acetyl Octapeptide-3) FAQ
What is the SNAP 8 peptide?
SNAP-8 is the trade name for acetyl octapeptide-3, a synthetic eight-amino-acid peptide used as an ingredient in topical cosmetic serums and creams.
Can you mix SNAP-8 with BAC water?
No. SNAP-8 is a cosmetic ingredient for topical products, not an injectable vial. There is nothing to reconstitute, so BAC water and syringe-unit math do not apply.
What is the difference between SNAP-8 and Argireline?
Argireline is acetyl hexapeptide-3, a six-amino-acid peptide. SNAP-8 extends that sequence by two amino acids, making acetyl octapeptide-3. Both are topical cosmetic ingredients.
How do I read the percentage on a SNAP 8 serum?
A percentage by weight means grams per 100 g of product, so 1% equals 10 mg per gram. The figure may refer to an ingredient solution rather than pure peptide, so labels are not always directly comparable.
Is SNAP-8 a drug?
No. Acetyl octapeptide-3 is a cosmetic ingredient, not an FDA-approved drug, and it is not intended for injection.