01 / Reference identity
Identity at a glance.
Public records list SNAP-8 as acetyl octapeptide-3: one eight-residue chain with both ends modified, an acetyl group at the N-terminus and an amide at the C-terminus. The formula and weight below include both end groups; the salt form of a supplied lot follows its own record.
| Sequence, three-letter | Ac–Glu–Glu–Met–Gln–Arg–Arg–Ala–Asp–NH₂ |
|---|---|
| Sequence, one-letter | Ac-EEMQRRAD-NH₂ |
| Length | 8 residues |
| End groups | N-terminal acetyl, C-terminal amide |
| Formula, acetylated and amidated | C41H70N16O16S |
| Molecular weight | 1075.2 g/mol |
| CAS number | 868844-74-0 |
| PubChem CID | 76283482 |
| Other names in public records | Acetyl octapeptide-3 |
References: [2]
02 / Molecular architecture
A closer look at the chain.
Octapeptide denotes an eight-residue chain, while acetyl identifies a terminal modification. The public record gives the chain as Glu–Glu–Met–Gln–Arg–Arg–Ala–Asp, with an acetylated N-terminus and an amidated C-terminus: the residue sequence and terminal chemistry, not only the shortened name SNAP-8.
- 8 residues
- Acetylated N-terminus
- Amidated C-terminus
- 1Glu
- 2Glu
- 3Met
- 4Gln
- 5Arg
- 6Arg
- 7Ala
- 8Asp
Reference information: [1][2]. Actual lot identity must be verified separately.
Separating an ingredient name from a formulation.
SNAP-8 appears in records for a formulated cosmetic ingredient associated with acetyl octapeptide-3. A finished solution contains more formulation information than the peptide name alone. Its concentration and other specifications should not be transferred to a separately supplied research powder.
What the longer chemical name explains.
Octapeptide identifies an eight-residue peptide, while acetyl identifies a chemical modification. Those words provide useful structural clues without specifying every residue or formulation detail. The identity record, rather than the abbreviated trade name, is the place to resolve the complete molecular description.
03 / Read the evidence
Research & analytical context.
The linked manufacturer record concerns a formulated peptide solution. It is useful for tracing the ingredient name, but does not establish performance, concentration or stability for a separate lyophilized research material.
The distinction that matters
A formulated cosmetic ingredient and a raw research powder have different specifications. Confirm the peptide sequence, terminal chemistry and supplied form directly from the material record.
04 / From reference to record
Know the lot, too.
A publication describes its own test material. Your lot’s certificate describes what was tested on that lot. Keep the compound name, batch number and reported methods together when reviewing a result.
Identity & composition
Check sequence or chemical form, terminal modifications, counterion and—where relevant—each blend component.
Analytical results
Read purity, content, sterility and endotoxin results as separate measurements. Only call a test passed when the actual report supports it.
Handling & storage notes
Lyophilized material: Store at −20°C; protect from light and moisture.
Follow the material-specific label and supporting storage documentation. These temperatures do not establish a shelf life.
How to store lyophilized peptides05 / Reference questions
A few details, explained.
Does a solution specification apply to the powder?
Not automatically. A formulated solution and a lyophilized material have different specifications. Concentration or stability information must belong to the actual material being described.
Does acetyl count as a ninth residue?
No. It is a chemical modification rather than another amino acid in the octapeptide count. Residue number and terminal modifications are separate parts of the identity.
06 / Continue reading
Go to the source.
Each source is labeled by its type. External sources are not Pioneer batch certificates.