VIP testing.
Vasoactive intestinal peptide — 28 residues.
The short answer
VIP is tested by reverse-phase HPLC (UV 214 nm): chromatographic purity plus duplicate quantification in mg per vial against a qualified commercial reference standard. Identity is assessed by retention time against the same standard, with mass-spectrometry confirmation available as an add-on. €207 per vial, 48–72 h target turnaround, and the result is published in the public database.
What the analysis measures
Purity, quantity, identity
- Chromatographic purity (%). The main peak's share of total integrated area at UV 214 nm. It is a ratio of peptide-related peaks — not a claim about absolute mass content.
- Quantity (mg/vial). Measured content against a qualified commercial reference standard, run in duplicate; both values appear on the certificate next to the label claim.
- Identity. Retention time against the reference standard. That is presumptive identity, and the certificate says so; a mass-spectrometry match (+€79 add-on) confirms it conclusively.
The complete method — column, gradient, wavelength, limits — is published on the open method page.
Reference parameters
The molecule on paper
| Molecular weight | 3326.8 Da |
| Molecular formula | C147H237N43O43S |
| CAS number | 37221-79-7 |
| Class | Vasoactive intestinal peptide — 28 residues. |
| Also seen as | Vasoactive intestinal peptide |
| Tariff category | Specialty peptides |
| Reference basis | A qualified commercial reference standard |
Parameters as recorded in PubChem, rounded. Your supplier's salt form and net-peptide content will differ from free-peptide values.
Worth knowing
Before you test VIP
VIP is a well-described 28-residue peptide with a qualified commercial standard. Specialty-tier pricing reflects its low sample volume and dedicated standard; the analytical template is unchanged: published method, duplicate quantification, stated identity basis.
Price
€207 per vial, published
VIP testing is €207 at the published founder rate — see its row in the price list. Add-ons: mass-spectrometry identity confirmation +€79 (adds 5–7 days), extended CoA data +€15, additional report +€29 (at order creation), rush +50%, additional vial of the same lot −30%.
On the certificate
What the CoA shows
- Measured quantity in duplicate, next to the label claim.
- Chromatographic purity with the full impurity table, not just the headline figure.
- The identity basis, stated: retention-time (presumptive) or mass-spectral (confirmed).
- Method reference and version, so the numbers can be interrogated.
- A public database entry — every result is published, verifiable by anyone, good or bad.
New to certificates? Read how to read a peptide CoA and how to verify one.
FAQ
VIP testing questions
How much does VIP testing cost?
€207 per vial at the published founder rate: chromatographic purity plus duplicate quantification in mg per vial, with the result published in the public database. Mass-spectrometry identity confirmation is +€79, extended CoA data +€15, and an additional report +€29 at order creation.
How long does VIP testing take?
The target turnaround is 48–72 hours from sample receipt. A rush option at +50% moves the sample to the front of the queue; the mass-spectrometry add-on adds 5–7 days.
Same category
Also tested in Specialty peptides
Kisspeptin-10 · KPV · LL-37 · SS-31 (Elamipretide) · ARA-290 (Cibinetide) — or see the full price list.
Iberian Analytical opens in Q1 2027 — €99 per test, 48–72 h target, and every result published in a public database, mandatory and free. Nothing is sold on this site today. Leave an email and we will write once, when the laboratory starts issuing certificates.
Testing for a business? Apply for a trade account — volume tiers and a 24-month rate lock.