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Know what’s actually in the vial.

Independent identity and purity testing for research peptides by LC–MS and HPLC. Every report we issue is published under its number, every number checkable.

Cupel CL-2026-99901-6 Issued

Certificate of analysis

Semaglutide · purity 98.8% area, meets claim · identity confirmed

Example report · illustrative dataNo sample was analysed to produce this document. Serials 99900–99999 are example reports.

Results

Results, one row per test.
TestMethodResultSpecificationConclusion
PurityRP-HPLC–UV 214 nm, area normalisation, USP <621>98.8% areaat least 98% (label claim)Meets claim
IdentityLC–MS, ESI+, accurate mass (Q-TOF)Confirmed, max 5.6 ppmwithin 10 ppm (laboratory criterion)Confirmed
Mass per vial, free peptideRP-HPLC–UV, external standard4.30 mg/vial––
Water contentCoulometric Karl Fischer, USP <921>3.40% w/w––
Bacterial endotoxinKinetic chromogenic LAL, USP <85>0.41 EU/mg––

– No specification supplied: reported as measured, for information. Purity 98.8 ± 0.3% (U, k = 2): meets 98% with the uncertainty included; decision rule with the method parameters. In plain terms and the mass balance on the mass-per-vial page are opinion and interpretation (ISO/IEC 17025 7.8.7); In plain terms was generated from the results above.

In plain terms
The material is confirmed as semaglutide. Purity is 98.8% by peak area. That meets the label’s claim of at least 98%. Each vial contains about 4.3 mg of semaglutide as free peptide, against a nominal fill of 5 mg. The rest of the powder is water (0.17 mg, 3.4% of the powder), the trifluoroacetate counter-ion (at most 0.47 mg by stoichiometry) and minor impurities (0.05 mg); 0.05 mg (0.9% of the fill) is not assigned. Bacterial endotoxin was 2.1 EU per vial, 0.41 EU per mg of the 5 mg nominal fill. No endotoxin limit was set for this material, so the figure is given for information.

Cut here. The full page carries the laboratory and report blocks, the sample as received, both signatures, the QR code and the hashes.

The top of page 1 of the certificate you get. Open CL-2026-99901-6 for the whole report and the data behind it.

  • Published prices. No account, no quote.
  • Every report is public under its number, and anyone can check it without asking us.
Per sample $185

Tells you it is the named peptide and how clean it is. For the milligrams in the vial, add Mass per vial (+$60) on the next page or take the Full panel.

We email the invoice when you submit your request, payable on receipt; results in 10 business days or the payment is refunded, and you still get them.

How it works

From order to published report in four steps.

  1. Order online

    Pick the test and the peptide. No account and no quote: we email the invoice when you submit, payable on receipt.

  2. Ship the sealed vial

    Print the intake sheet, put it in the box with the vial as sold, and send it to the address in your confirmation email.

  3. We log it, then run it

    On receipt we assign the accession number and start the 10-business-day clock. Then purity by RP-HPLC–UV and identity by LC–MS, three injections, every method parameter published.

  4. Your report is published

    Under that number, with a hash and a QR code. You get the certificate PDF by email.

Shipping and payment details

Tests and pricing

Published and fixed. You will not be asked for a quote.

Identity

$95per sample

LC–MS (ESI+). Confirms that the main component has the exact mass of the named peptide: every charge state we record within 10 ppm of the formula. A mass match cannot tell a D- from an L-amino acid; we do not sequence.

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Purity

$145per sample

RP-HPLC–UV at 214 nm, area percent, with the chromatogram.

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Recommended

Identity + Purity

$185per sample

Identity and purity on one sample, one report.

Tells you it is the named peptide and how clean it is. To know how many milligrams are in the vial, add Mass per vial (+$60) or take the Full panel.

Order

Full panel

$340per sample

Identity + Purity with Mass per vial, Water content and Bacterial endotoxin.

Saves $55 against Identity + Purity with all three add-ons.

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What each test includes is on the pricing page.

Mass per vial+$60 External-standard HPLC against a named reference standard. Reported as mg of free peptide per vial, with the salt and water accounted for. Adds to Identity + Purity only, because it rides on the same HPLC run and reference standard. Order mass per vial with Identity + Purity
Water content+$55 Coulometric Karl Fischer, whole vial. Reported as mass percent. Adds to Identity, Purity or Identity + Purity; the Full panel already includes it. Order water content with Identity + Purity
Bacterial endotoxin+$95 Kinetic chromogenic LAL. Reported in EU per mg of powder; no limit is applied unless you supply one. Adds to Identity, Purity or Identity + Purity; the Full panel already includes it. Order bacterial endotoxin with Identity + Purity

Per sample, in CAD, for lyophilised powder only. The same price for one vial and for two hundred; there is no volume discount. What each test includes · What the methods cannot determine.

What your report contains

This is the certificate you receive, in the format exactly as issued. The data on it is illustrative until the first real report replaces it here.

Open the example report Download the PDF (9 pages, 149 KB)
  • The chromatogram, with every peak at or above the 0.05% reporting threshold named by retention time.
  • Three injections and their spread, not one averaged number.
  • Identity by mass spectrometry: each charge state within 10 ppm of what the formula predicts.
  • What could not be resolved, in a row of its own.
  • Received and issued dates and times, and your lot reference, so a buyer can match the report to the vial.
  • The analyst and the reviewer, named, with the date each signed.
  • A SHA-256 hash and a QR code that verify without contacting anyone.

For vendors

Your buyers can check us without asking you.

Order for a batch Batch manifest (PDF, 49 KB)
  • Each lot gets its own accession number and its own page. Put the QR on the listing and the buyer reaches our register, not your site. A box of many lots ships with one manifest, one line per lot.
  • The same price per sample whether you send one or two hundred. No volume discount, so no reason for us to want a particular result.
  • A low result is published under its number like any other, next to your lot reference.

Holding one of our certificates?

Paste its number and find out whether we wrote it. No account and no email.

Check a report

Before you order

What do I get for $185?

Identity and purity on one sample, in one report: the chromatogram with retention times, three injections and their spread, the identity confirmation by mass spectrometry, every peak at or above our 0.05% area reporting threshold, anything the method could not resolve, and a PDF certificate with a number anyone can verify. Until the limit of quantitation for your analyte has been measured, and the scope table says whether it has, a smaller peak may be present and not seen.

How to read the certificate, element by element

Do I need an account or a quote?

No. Prices are published and the same for everyone. You submit your testing request, we email the invoice straight away, and you ship.

How much do I send?

The minimum per test: Identity (ID): one sealed vial as sold; Purity (PUR) or both (IDP): one sealed vial as sold; Mass per vial (QNT): three sealed vials as sold; Water content (H2O): two sealed vials as sold; Bacterial endotoxin (LAL): one sealed vial as sold; Full panel (FULL): five sealed vials of the same lot, as sold: three are dissolved whole, by mass, to 2.0 mg/mL nominal in LAL reagent water (10 mM Tris of LAL grade for semaglutide, tirzepatide and retatrutide), for content per vial; purity, identity and endotoxin are taken from those solutions. Two more are used whole for water content.. Send the sealed container exactly as you received it.

How to pack it

When do I pay?

When you receive the invoice, which we email as soon as you submit your testing request; it is payable on receipt. The bank account and the card processor are not published yet; ask before you send a sample if you need them first. The status page lists them as open until they are set. If we miss the turnaround the payment is refunded, and you still get the results.

How long does it take?

10 business days from the Received time printed on your report, which is set when we log the sample. The clock pauses only while we wait for your answer to a written question about it. Miss the date and the invoice is cancelled, or your payment refunded, and you still get the results.

Will my name be on the report?

No. No sender’s name, company or contact is recorded in the register or printed on any report. The lot reference you give us is printed, so a buyer can match the report to the vial.

Is every result published?

Yes. Every report is published at its own address under its number, whatever it says, and we will not delete it: the register refuses a deletion and shows one at its next integrity check. Your name is not on it; your lot reference is.

What happens if the identity does not match, the vial arrives opened, or your peptide is not on the list: answered on the sending page.

Results in 10 business days, or they’re free.

Order a test How to send a sample

Our record against this promise starts with the first report; none has been issued yet. See the figures.

Business days exclude weekends and Ontario public holidays.
The conditions in full The clock pauses only while we are waiting on your answer to a written question about the sample. It applies per accession; for a shipment above our weekly capacity we tell you the date before you ship, and that date is the one we are held to. Our weekly capacity is not yet published.
Identity + Purity, $18510 business days or they’re free
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