FOXO4-DRI (15mg) Lot FOX15N021426: Certificate of Analysis (COA)
Paramount Peptides · tested Feb 27, 2026 by Janoshik · Older lot
This page summarizes the third-party lab report for lot FOX15N021426 of FOXO4-DRI (15mg) 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.
FOXO4-DRI (15mg) lot FOX15N021426 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 | 99.734% · Per vial: 99.734%; 99.778%; 99.794% (lowest, 99.734%, 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 | FOX15N021426 |
|---|---|
| Product (as labeled by vendor) | FOXO4-DRI (15mg) |
| Labeled vial size | 15 mg |
| Testing laboratory | Janoshik |
| Tests requested | Assessment of a peptide vial or vials |
| Testing ordered | Feb 23, 2026 |
| Sample received by lab | Feb 24, 2026 |
| Report date | Feb 27, 2026 |
| Task number + unique key | Task #111052, key Y4V7B283QSWN |
| 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.
Compound reference: FOXO4-DRI
- Also called
- FOXO4 D-retro-inverso peptide
- Formula
- C228H388N86O64
- Mol. weight
- 5358 g/mol
- CAS
- 2460055-10-9
- Source
- PubChem CID 167312269 ↗
A peptide made of D-amino acids in reversed order (a D-retro-inverso design) derived from part of the FOXO4 protein. Reference data only; it describes the molecule, not any use of it. For laboratory research use only.
FOXO4-DRI research profile · Where to get lab-tested FOXO4-DRI
FOXO4-DRI (15mg) lot history at Paramount Peptides
All 2 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 |
|---|---|---|---|
| FOX15N030826 | Apr 17, 2026 | Janoshik | 99.80% |
| FOX15N021426 | Feb 27, 2026 | Janoshik | 99.73% |
Also available from Peptira
FOXO4-DRI is also carried by Peptira, our other tested supplier. These are the most recent FOXO4-DRI certificates we have from them; each links to its own lot page.
| Product | Lot | Report date | Lab | HPLC purity |
|---|---|---|---|---|
| FOX04-DRI Vial 10 mg | FOX10-001 | Nov 9, 2025 | Freedom Diagnostics | 99.83% |
Where to get lab-tested FOXO4-DRI: products, sizes and latest COAs →
What to check on your vial
- The lot number on the vial label reads FOX15N021426, character for character.
- The product name and vial size on the label match FOXO4-DRI (15mg) (15 mg).
- The lab's own record (www.janoshik.com, code Task #111052, key Y4V7B283QSWN) shows the same lot, report date (Feb 27, 2026) 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 FOX15N021426.
- Open Janoshik's record with the button above, or go to www.janoshik.com and enter Task #111052, key Y4V7B283QSWN.
- 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 FOX15N021426
What HPLC purity did FOXO4-DRI (15mg) lot FOX15N021426 test at?
Janoshik reported 99.73% HPLC purity for lot FOX15N021426 in a report dated Feb 27, 2026.
How do I verify the COA for lot FOX15N021426?
Go to www.janoshik.com and enter the task number + unique key Task #111052, key Y4V7B283QSWN. The lab's own record should show lot FOX15N021426 with the same dates and results as this page.
Is lot FOX15N021426 the newest FOXO4-DRI (15mg) lot from Paramount Peptides?
No. The most recent FOXO4-DRI (15mg) certificate we have from Paramount Peptides is lot FOX15N030826. 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 FOX15N021426 exactly. A certificate of analysis covers one lot; it says nothing about other lots of the same product.
Other lots and COAs
FOXO4-DRI (15mg) at Paramount Peptides
Lab-tested lot FOX15N021426 · 99.73% 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.