TB-500 Vial 10 mg Lot TB5-10-005: Certificate of Analysis (COA)
Peptira · tested Apr 16, 2026 by Freedom Diagnostics · Most recent COA
This page summarizes the third-party lab report for lot TB5-10-005 of TB-500 Vial 10 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.
TB-500 Vial 10 mg lot TB5-10-005 test results, explained
Every result printed on this certificate, as reported by Freedom Diagnostics, 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 | 99.25% · Per-vial HPLC purity: 99.25%, 99.31%, 99.25% | 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 (LC-MS) | Confirmed · compound named: Thymosin Beta-4 | Mass spectrometry measures the molecular mass of what's in the vial and compares it with the declared compound. "Confirmed" means the lab found the expected compound. Expected average molecular weight of TB-500 (thymosin beta-4) (PubChem): 889.0 g/mol. The observed mass appears in the certificate's chart and isn't transcribed here. | Reported as matching the declared compound |
| Quantity (measured content) | per vial: 10.75 mg, 11.27 mg, 11.37 mg | How much peptide the lab measured in the vial, compared with the amount printed on the label. | Reported |
| Appearance | White Lyophilized Powder | What the lab recorded before testing: the colour and physical form of the material. | Recorded |
| Endotoxin (LAL assay (USP <85>)) | Pass (LAL, USP <85>) | Bacterial endotoxins are fragments of bacterial cell walls. The LAL assay measures them in endotoxin units (EU/mL); a pass means the result was under the lab's limit. | Pass (as reported by the lab) |
Lot and report details
| Lot / batch number | TB5-10-005 |
|---|---|
| Product (as labeled by vendor) | TB-500 Vial 10 mg |
| Labeled vial size | 10 mg |
| Testing laboratory | Freedom Diagnostics |
| Sample received by lab | Apr 15, 2026 |
| Report date | Apr 16, 2026 |
| Method (as stated) | HPLC with UV detection coupled with mass spectrometry (LC-MS) |
| Search Code | Pept2604150109 |
| Lab-record check | On Oct 7, 2026 the vendor's PDF was byte-for-byte identical to the copy hosted on the lab's site. |
| Vendor | Peptira |
| Verify | Open Freedom Diagnostics's record ↗ |
Data notes: Lab received 04/15/2026, reported 04/16/2026 (MM/DD/YYYY).
The certificate itself
About Freedom Diagnostics
A peptide testing lab in Franklin, Tennessee (per the lab's website) that publishes its certificates in a searchable online database.
Accreditation: No accreditation is printed on these certificates, and we found no published ISO/IEC 17025 accreditation for the lab (checked Oct 7, 2026).
Tests: On the certificates here: HPLC purity with LC-MS identity, net content and, where ordered, endotoxin (LAL), a microbial PCR screen and other screens.
How to verify: Search the Search Code on freedomdiagnosticstesting.com. The lab hosts its own PDF copy of each certificate, which should match the vendor's copy.
Open Freedom Diagnostics's record ↗Lab info from: freedomdiagnosticstesting.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)
TB-500 Vial 10 mg lot history at Peptira
All 5 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 |
|---|---|---|---|
| TB5-10-005 | Apr 16, 2026 | Freedom Diagnostics | 99.25% |
| TB5-10-004 | Dec 18, 2025 | Freedom Diagnostics | 99.30% |
| TB5-10-003 | Nov 20, 2025 | Freedom Diagnostics | 99.44% |
| TB5-1-002 | Aug 13, 2025 | Janoshik | 99.94% |
| TB5-10-001 | Jul 16, 2025 | Janoshik | 99.86% |
Also available from Paramount Peptides
TB-500 (thymosin beta-4) is also carried by Paramount Peptides, 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 |
|---|---|---|---|---|
| Thymosin Beta 4 (TB500) (10mg) | 26VTBC164 | Jul 8, 2026 | Accumark Labs | 99.12% |
| Thymosin Beta 4 (TB500) (10mg) | TB10-12222025-J | Jul 6, 2026 | Accumark Labs | 99.81% |
| Thymosin Beta 4 (TB500) (20mg) | 26VTBC110 | May 15, 2026 | Accumark Labs | 99.39% |
| Thymosin Beta 4 (TB500) (20mg) | 26VTBL068 | May 7, 2026 | Accumark Labs | 99.62% |
| Thymosin Beta 4 (TB500) (20mg) | 26VTBLO68 | Apr 17, 2026 | Janoshik | 99.46% |
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 TB5-10-005, character for character.
- The product name and vial size on the label match TB-500 Vial 10 mg (10 mg).
- The lab's own record (freedomdiagnosticstesting.com, code Pept2604150109) shows the same lot, report date (Apr 16, 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 TB5-10-005.
- Open Freedom Diagnostics's record with the button above, or go to freedomdiagnosticstesting.com and enter Pept2604150109.
- 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 TB5-10-005
What HPLC purity did TB-500 Vial 10 mg lot TB5-10-005 test at?
Freedom Diagnostics reported 99.25% HPLC purity for lot TB5-10-005 in a report dated Apr 16, 2026.
How do I verify the COA for lot TB5-10-005?
Go to freedomdiagnosticstesting.com and enter the search code Pept2604150109. The lab's own record should show lot TB5-10-005 with the same dates and results as this page.
Is lot TB5-10-005 the newest TB-500 Vial 10 mg lot from Peptira?
It's the most recent TB-500 Vial 10 mg certificate we have on file from Peptira 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 TB5-10-005 exactly. A certificate of analysis covers one lot; it says nothing about other lots of the same product.
Other lots and COAs
TB-500 Vial 10 mg at Peptira
Lab-tested lot TB5-10-005 · 99.25% HPLC purity · Freedom Diagnostics
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.