TB-500 UK buying guide: identity, vial size and COAs
When comparing TB-500 research listings, check the exact compound identity, quantity per vial and batch-specific COA. The product name alone does not establish that two suppliers are offering the same material. Start with the current 10mg listing below, then use this guide to review its documentation.
Last updated: 2026-08-21 · By: Index Peptides technical team
Compare current products and prices
Prices are per vial in GBP, before any eligible offer. Read each product's dispatch notice before ordering. Published records can cover earlier lots; match the certificate to the lot supplied.
| Research material | Vial size | Price | Availability | Batch documentation |
|---|---|---|---|---|
| TB-500 | 10mg per vial | £34.99 | In stock | IP-TB10-001 |
| TB-500 10mg | |
|---|---|
| CAS number | 885340-08-9 |
| Molecular weight | ~889.0 g/mol |
| Supplied as | Lyophilised powder, 10mg per vial |
| Documentation | COA published on the product page |
Why the COA is the conversation
TB-500 is the 7-amino-acid actin-binding fragment of thymosin beta-4 (CAS 885340-08-9, ~889.0 g/mol). Because the compound circulates mainly among research buyers, quality differences show up almost entirely in documentation — which is why a certificate tied to the specific lot is the deciding factor.
What a real TB-500 COA lists
Batch or lot number; HPLC purity with the chromatogram; identity confirmation (detected vs expected mass); the testing lab and test date; and the exact form and counter-ion. If any of those is missing, or the document cannot be matched to the vial in your hand, treat the listing as weaker.
Purity is not identity
HPLC purity measures how clean the sample is; LC-MS identity confirms what it is. A TB-500 record should show both, because a pure sample of the wrong molecule is still the wrong molecule. The strongest records are independently testable by lot number.
How to order from Index Peptides
TB-500 10mg is listed with its COA on the product page and is checkable by lot number on the verify page. Order online or request an invoice for lab and institutional orders. Research use only.
Frequently asked questions
Is TB-500 the same as thymosin beta-4?
No — TB-500 is the synthetic 7-amino-acid fragment (the actin-binding region, LKKTETQ) of thymosin beta-4, with its own CAS number (885340-08-9).
What should I check before ordering TB-500?
The batch number on the vial must match the certificate, and the certificate should show HPLC purity plus identity confirmation from an independent test.
Who can buy TB-500 from Index Peptides?
Index Peptides supplies TB-500 exclusively to qualified researchers and licensed laboratories, for in-vitro research only. It is not for human or veterinary use.
References
Research use only. Not for human or animal consumption.