PEG MGF (5mg) Lot PMG5N120925: Certificate of Analysis (COA)
Paramount Peptides · tested Dec 30, 2025 by Janoshik · Older lot
This page summarizes the third-party lab report for lot PMG5N120925 of PEG MGF (5mg) sold by Paramount Peptides. The lot number on this page should match the lot printed on the vial label. Don't rely on this summary alone: use the button to open the lab's own record and compare the lot, date and results.
PEG MGF (5mg) lot PMG5N120925 test results, explained
Every result printed on this certificate, as reported by Janoshik, with a plain-English note on what the test measures. "Pass" and "specification" wording comes from the certificate; where the lab prints no pass/fail, we say so.
| Test | Result on the certificate | What it measures | This lot |
|---|---|---|---|
| HPLC purity | 99.722% · Per vial: 99.727%; 99.722%; 99.791% (lowest, 99.722%, shown) | HPLC separates the sample into its components; purity is the share of the detected signal that sits in the main peak. On its own it doesn't show which molecule that peak is. That's what the identity test is for. | No pass/fail printed; reported value at or above 98% |
| Identity | Not reported | This certificate doesn't report an identity test, so it doesn't confirm which molecule is in the vial. Purity and quantity alone can't tell you that. | Not tested on this certificate |
Lot and report details
| Lot / batch number | PMG5N120925 |
|---|---|
| Product (as labeled by vendor) | PEG MGF (5mg) |
| Labeled vial size | 5 mg |
| Testing laboratory | Janoshik |
| Tests requested | Assessment of a peptide vial or vials |
| Testing ordered | Dec 18, 2025 |
| Sample received by lab | Dec 23, 2025 |
| Report date | Dec 30, 2025 |
| Task number + unique key | Task #95468, key KUXEHI9Y48CR |
| Lab-record check | Not checked automatically. Open the lab's record to compare. |
| Vendor | Paramount Peptides |
| Verify | Open Janoshik's record ↗ |
The certificate itself
About Janoshik
An independent analytical lab based in Prague, Czech Republic (Janoshik s.r.o.). Each report carries a task number and a unique verification key.
Accreditation: No accreditation is printed on these reports, and we found no published ISO/IEC 17025 accreditation for the lab (checked Oct 7, 2026).
Tests: On the reports here: HPLC purity and the measured content per vial. Other tests appear only when they're listed under Results.
How to verify: Go to janoshik.com/verify and enter the unique key printed on the report (the report's QR code links there too). Janoshik blocks automated checks, so we haven't matched these records ourselves.
Open Janoshik's record ↗Lab info from: janoshik.com · checked Oct 7, 2026.
PEG MGF (5mg) lot history at Paramount Peptides
All 3 certificates we have for this product from Paramount Peptides, newest first. The chart plots HPLC purity by report date (lots without a purity figure are left out). This lot is highlighted.
| Lot | Report date | Lab | HPLC purity |
|---|---|---|---|
| PMG5N022426 | Mar 16, 2026 | Janoshik | 99.67% |
| PMG5n021026 | Feb 23, 2026 | Janoshik | 99.91% |
| PMG5N120925 | Dec 30, 2025 | Janoshik | 99.72% |
What to check on your vial
- The lot number on the vial label reads PMG5N120925, character for character.
- The product name and vial size on the label match PEG MGF (5mg) (5 mg).
- The lab's own record (www.janoshik.com, code Task #95468, key KUXEHI9Y48CR) shows the same lot, report date (Dec 30, 2025) and results as this page.
- The report date is a date you'd expect for your purchase: a much older certificate may belong to an earlier lot.
- The identity line names the compound you expect. If it's "Not reported", the certificate doesn't confirm which molecule is in the vial.
- The certificate is a clean document: no mismatched fonts, edited numbers or a missing verification code.
How to check this COA in under a minute
- Find the lot number on your vial label and confirm it reads PMG5N120925.
- Open Janoshik's record with the button above, or go to www.janoshik.com and enter Task #95468, key KUXEHI9Y48CR.
- Compare the lot number, test date, purity and identity result with the table above. They should be identical.
- New to COAs? Read How to read a peptide COA for what HPLC purity and mass spec identity mean.
Questions about lot PMG5N120925
What HPLC purity did PEG MGF (5mg) lot PMG5N120925 test at?
Janoshik reported 99.72% HPLC purity for lot PMG5N120925 in a report dated Dec 30, 2025.
How do I verify the COA for lot PMG5N120925?
Go to www.janoshik.com and enter the task number + unique key Task #95468, key KUXEHI9Y48CR. The lab's own record should show lot PMG5N120925 with the same dates and results as this page.
Is lot PMG5N120925 the newest PEG MGF (5mg) lot from Paramount Peptides?
No. The most recent PEG MGF (5mg) certificate we have from Paramount Peptides is lot PMG5N022426. Your vial label tells you which lot you have.
Does this certificate apply to my vial?
Only if the lot number printed on your vial reads PMG5N120925 exactly. A certificate of analysis covers one lot; it says nothing about other lots of the same product.
Other lots and COAs
PEG MGF (5mg) at Paramount Peptides
Lab-tested lot PMG5N120925 · 99.72% HPLC purity · Janoshik
Affiliate disclosure: We earn a commission if you buy through the vendor links on this page, at no extra cost to you. Peptides & Coffee is an independent COA reference and is not owned by or affiliated with the vendors or labs listed. Lab results are published by the vendors and labs; we link to each lab's own verification record so you can check them yourself. Stock and lots change: the vendor may be shipping a newer lot than the one on this page, so check your vial label.