Thymosin Beta 4 (TB500) (5mg) Lot TB45N030126: Certificate of Analysis (COA)
Paramount Peptides · tested Apr 17, 2026 by Janoshik · Most recent COA
This page summarizes the third-party lab report for lot TB45N030126 of Thymosin Beta 4 (TB500) (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.
Thymosin Beta 4 (TB500) (5mg) lot TB45N030126 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 | 99.778% · Per vial: 99.778%; 99.887% (lowest, 99.778%, 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 | TB45N030126 |
|---|---|
| Product (as labeled by vendor) | Thymosin Beta 4 (TB500) (5mg) |
| Labeled vial size | 5 mg |
| Testing laboratory | Janoshik |
| Tests requested | Assessment of a peptide vial or vials |
| Testing ordered | Mar 24, 2026 |
| Sample received by lab | Apr 1, 2026 |
| Report date | Apr 17, 2026 |
| Task number + unique key | Task #148150, key PQIFABI2ZZHX |
| 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: TB-500 (thymosin beta-4)
- Also called
- TB-500; thymosin beta-4 fragment Ac-LKKTETQ; thymosin β4 (Tβ4)
- Sequence
- Ac-LKKTETQ (7 residues)
- Formula
- C38H68N10O14
- Mol. weight
- 889.0 g/mol
- CAS
- 885340-08-9
- Source
- PubChem CID 62707662 ↗
"TB-500" is used both for the 7-residue fragment Ac-LKKTETQ (PubChem's TB-500 record, shown here) and, on many vendor COAs, for full-length thymosin beta-4 (43 residues, PubChem CID 45382195). Check which molecule the identity line on a lot's COA names. Reference data only; it describes the molecule, not any use of it. For laboratory research use only.
TB-500 (thymosin beta-4) research profile · Where to get lab-tested TB-500 (thymosin beta-4)
Thymosin Beta 4 (TB500) (5mg) lot history at Paramount Peptides
All 7 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 |
|---|---|---|---|
| TB45N030126 | Apr 17, 2026 | Janoshik | 99.78% |
| TB92025 | Dec 4, 2025 | Janoshik | 99.04% |
| TB45A110725 | Nov 20, 2025 | Janoshik | 99.02% |
| TB45A110825 | Nov 20, 2025 | Janoshik | 99.22% |
| TB5A103125 | Nov 6, 2025 | Janoshik | 99.02% |
| TB45A060225 | Jun 10, 2025 | Janoshik | 99.07% |
| TB45C€20125 | May 5, 2025 | Janoshik | 99.03% |
Also available from Peptira
TB-500 (thymosin beta-4) is also carried by Peptira, our other tested supplier. These are the most recent TB-500 (thymosin beta-4) certificates we have from them; each links to its own lot page.
| Product | Lot | Report date | Lab | HPLC purity |
|---|---|---|---|---|
| TB-500 Vial 10 mg | TB5-10-005 | Apr 16, 2026 | Freedom Diagnostics | 99.25% |
| TB-500 Vial 10 mg | TB5-10-004 | Dec 18, 2025 | Freedom Diagnostics | 99.30% |
| TB-500 Vial 10 mg | TB5-10-003 | Nov 20, 2025 | Freedom Diagnostics | 99.44% |
| TB-500 Vial 10 mg | TB5-1-002 | Aug 13, 2025 | Janoshik | 99.94% |
| TB-500 Vial 10 mg | TB5-10-001 | Jul 16, 2025 | Janoshik | 99.86% |
Where to get lab-tested TB-500 (thymosin beta-4): products, sizes and latest COAs →
What to check on your vial
- The lot number on the vial label reads TB45N030126, character for character.
- The product name and vial size on the label match Thymosin Beta 4 (TB500) (5mg) (5 mg).
- The lab's own record (www.janoshik.com, code Task #148150, key PQIFABI2ZZHX) shows the same lot, report date (Apr 17, 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 TB45N030126.
- Open Janoshik's record with the button above, or go to www.janoshik.com and enter Task #148150, key PQIFABI2ZZHX.
- 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 TB45N030126
What HPLC purity did Thymosin Beta 4 (TB500) (5mg) lot TB45N030126 test at?
Janoshik reported 99.78% HPLC purity for lot TB45N030126 in a report dated Apr 17, 2026.
How do I verify the COA for lot TB45N030126?
Go to www.janoshik.com and enter the task number + unique key Task #148150, key PQIFABI2ZZHX. The lab's own record should show lot TB45N030126 with the same dates and results as this page.
Is lot TB45N030126 the newest Thymosin Beta 4 (TB500) (5mg) lot from Paramount Peptides?
It's the most recent Thymosin Beta 4 (TB500) (5mg) certificate we have on file from Paramount Peptides as of Oct 8, 2026. Vendors can ship a newer lot before its certificate is posted, so check your vial label.
Does this certificate apply to my vial?
Only if the lot number printed on your vial reads TB45N030126 exactly. A certificate of analysis covers one lot; it says nothing about other lots of the same product.
Other lots and COAs
Thymosin Beta 4 (TB500) (5mg) at Paramount Peptides
Lab-tested lot TB45N030126 · 99.78% HPLC purity · Janoshik
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