What is a COA?
A certificate of analysis tells you what is in a batch and how it was measured. How to read one, and how to check that it belongs to your vial.
- Purity
- ≥99% HPLC
- COA
- per batch
- Strength
- 10 mg
Snap-8
Snap-8 is a synthetic peptide of 8 amino acids, with an acetyl group at the start and an amide at the end of the chain. Buy Snap-8 for laboratory research from PulseChem: 10 mg of lyophilized powder per vial, ≥99% purity by HPLC and a COA for every batch.
€34.95 incl. VAT · €28.88 excl. VAT
- Shipping from Europe
- 1–3 working days within Europe
In stock
Volume discount
- 1–4 unitsUnit price€34.95 per unit
- 5–9 units5% off€33.20 per unit
- 10+ units10% off€31.46 per unit
Research Use Only. For laboratory research use only (in vitro). Not for human or animal use. The products are not medicines, foods, or cosmetics. They are not intended to diagnose, treat, cure, or prevent any disease. The information on this website has not been evaluated by the EMA, the Romanian National Agency for Medicines and Medical Devices (ANMDMR), or the FDA. Read the RUO policy
How is a solution prepared?
This is how solutions are prepared in the lab.
Step 1 of 8: Disinfect
The stoppers of both vials are wiped with an alcohol swab.
- Disinfect. The stoppers of both vials are wiped with an alcohol swab.
- Draw up. The needle passes through the stopper of the bacteriostatic water and the plunger draws up liquid.
- Transfer. The liquid runs down the inside wall of the vial with powder.
- Mix. The vial is gently swirled until the solution is clear.
- Done. The solution is ready for use in research.
- Take sample. A new needle passes through the stopper and the plunger draws up part of the solution.
- Sample vial. The solution runs through the septum of the screw cap into a sample vial.
- Analyze. The sample vial goes into the autosampler; the instrument measures the solution in vitro.
For laboratory research use only (in vitro). Not for human or animal use.
Molecule
Research area: Skin
- Molecular formula
- C41H70N16O16S
- Molecular mass
- 1,075.2 g/mol
Sequence: Ac-EEMQRRAD-NH₂
- first residue (N-terminus)
- modified residue or group
Structure from PubChem, CID 76283482. Schematic in 3D, not a measured structure.
The chain of Snap-8
Schematic view of the chain. This is not a measured 3D structure.
Point to an amino acid or use the arrow keys to see its name.
Drag or use the arrow keys to rotate the diagram. Point to a bead to see the name of the amino acid.
- Hydrophobic
- Uncharged side chain that avoids water.
- Polar
- Uncharged side chain that binds water.
- Positively charged
- Basic side chain, positive at neutral pH.
- Negatively charged
- Acidic side chain, negative at neutral pH.
The chain has 8 amino acids, shown here from the N-terminus to the C-terminus. The N-terminus is acetylated and the C-terminus is an amide. Calculated average molecular mass: 1,075.2 g/mol. Compare this figure with the mass on the certificate of analysis.
On the research map: Skin and hair
Batch and COA
The batch number is on the vial label. You can find the certificate of analysis for that batch on the Lab results page or request it from us.
Specifications
| Contents | 10 mg per vial |
|---|---|
| Sequence | Ac-Glu-Glu-Met-Gln-Arg-Arg-Ala-Asp-NH2 |
| Purity | ≥99% (HPLC) |
| Intended use | For laboratory research use only (RUO) |
About Snap-8
Buy Snap-8 from PulseChem
Each vial of Snap-8 holds 10 mg of lyophilized (freeze-dried) powder, sealed in glass. The batch number on the label is your key to that batch's certificate of analysis.
PulseChem has Snap-8 for sale to anyone aged 18 or over who is ordering for laboratory research, as a guest or with an account. You confirm research use at checkout.
What is Snap-8?
Snap-8 is an octapeptide: a chain of eight amino acids with two modified ends. According to PubChem, the start carries an acetyl group and the chain ends in an amide instead of a free acid. Both modifications are included in the calculated formula and mass. The chain contains one methionine, its only sulfur-containing amino acid. PubChem lists CAS number 868844-74-0. The Snap-8 sold by PulseChem is a research chemical, not a medicine.
Purity and COA for every batch
An external laboratory measures purity by HPLC (≥99%) and identity by mass spectrometry. With Snap-8, watch the methionine in the spectrum: an oxidized side chain gives a peak about 16 units heavier. The checks per batch are set out in the Laboratory standard; the COA itself is on Lab results.
Storage and shipping
Keep the vial closed and store it cool, dry and dark; the label and COA give the exact conditions. Shipping is from Europe, insulated and with tracking, plus a cold pack in warm weather. Received and paid before 3 p.m. Central European time on a working day: out the door that day, and delivery takes 1–3 working days within Europe. EU only.
For laboratory research only, not for human or animal use.
Questions about Snap-8
Where can I buy Snap-8?
Snap-8 is available from PulseChem in this web shop. The 10 mg vial costs €34.95 including VAT, and Snap-8 is in stock. Orders received and paid before 3 p.m. Central European time on a working day still ship the same day; delivery takes 1–3 working days within Europe. Every batch has a COA.
What is in a vial of Snap-8?
A vial of Snap-8 contains 10 mg of lyophilized powder: the octapeptide with an acetyl group at the start and an amide at the end. The vial is glass and sealed. The label shows the amount and the batch number, which you use to find the COA on the Lab results page.
Who can order Snap-8?
Snap-8 can be ordered by anyone aged 18 or over who buys it for laboratory research. PulseChem has research peptides for sale to guests and to customers with an account. At checkout you confirm that Snap-8 is for laboratory research only.
How is the purity of Snap-8 tested?
The purity of Snap-8 is determined per batch by an external laboratory using HPLC, and a batch is released at ≥99%. Mass spectrometry compares the measured mass with the calculated one, including the acetyl group and the amide. The COA with the batch number of your vial is on Lab results.
Background from the knowledge base
What does 99% purity mean?
A purity of 99% tells you about the composition of the peptide, not about the amount in the vial. What the number measures, and what it does not.
Why lyophilize?
Peptides are supplied as a freeze-dried powder because they break down quickly in solution. What happens during freeze-drying, and what it means for storage.
