TIRZ-2 Vial 20 mg Lot TIRZ20-001: Certificate of Analysis (COA)
Peptira · tested Jun 25, 2025 by Janoshik · Older lot
This page summarizes the third-party lab report for lot TIRZ20-001 of TIRZ-2 Vial 20 mg sold by Peptira. 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.
TIRZ-2 Vial 20 mg lot TIRZ20-001 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 | 99.611% | 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 |
| Quantity (measured content) | Tirzepatide 21.38 mg | How much peptide the lab measured in the vial, compared with the amount printed on the label. | Reported |
Lot and report details
| Lot / batch number | TIRZ20-001 |
|---|---|
| Product (as labeled by vendor) | TIRZ-2 Vial 20 mg |
| Labeled vial size | 20 mg |
| Testing laboratory | Janoshik |
| Tests requested | Assessment of a peptide vial or vials |
| Testing ordered | Jun 9, 2025 |
| Sample received by lab | Jun 24, 2025 |
| Report date | Jun 25, 2025 |
| Task number + unique key | Task #69225, key PHTZSLZU21KV |
| Lab-record check | Not checked automatically. Open the lab's record to compare. |
| Vendor | Peptira |
| Verify | Open Janoshik's record ↗ |
Data notes: Vendor table date 2025-06-24 differs from the certificate's analysis date 2025-06-25.
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.
TIRZ-2 Vial 20 mg lot history at Peptira
All 6 certificates we have for this product from Peptira, 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 |
|---|---|---|---|
| TIRZ20-006 | Apr 2, 2026 | Freedom Diagnostics | 99.92% |
| TIRZ20-005 | Oct 24, 2025 | Freedom Diagnostics | 99.96% |
| TIRZ20-004 | Oct 24, 2025 | Freedom Diagnostics | 99.94% |
| TIRZ20-003 | Sep 12, 2025 | Freedom Diagnostics | 99.82% |
| TIRZ20-002 | Aug 28, 2025 | Janoshik | 99.89% |
| TIRZ20-001 | Jun 25, 2025 | Janoshik | 99.61% |
What to check on your vial
- The lot number on the vial label reads TIRZ20-001, character for character.
- The product name and vial size on the label match TIRZ-2 Vial 20 mg (20 mg).
- The lab's own record (www.janoshik.com, code Task #69225, key PHTZSLZU21KV) shows the same lot, report date (Jun 25, 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 TIRZ20-001.
- Open Janoshik's record with the button above, or go to www.janoshik.com and enter Task #69225, key PHTZSLZU21KV.
- 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 TIRZ20-001
What HPLC purity did TIRZ-2 Vial 20 mg lot TIRZ20-001 test at?
Janoshik reported 99.61% HPLC purity for lot TIRZ20-001 in a report dated Jun 25, 2025.
How do I verify the COA for lot TIRZ20-001?
Go to www.janoshik.com and enter the task number + unique key Task #69225, key PHTZSLZU21KV. The lab's own record should show lot TIRZ20-001 with the same dates and results as this page.
Is lot TIRZ20-001 the newest TIRZ-2 Vial 20 mg lot from Peptira?
No. The most recent TIRZ-2 Vial 20 mg certificate we have from Peptira is lot TIRZ20-006. 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 TIRZ20-001 exactly. A certificate of analysis covers one lot; it says nothing about other lots of the same product.
Other lots and COAs
TIRZ-2 Vial 20 mg at Peptira
Lab-tested lot TIRZ20-001 · 99.61% HPLC purity · Janoshik
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