Buy TB-500 UK — What the COA Should Show
TB-500 (thymosin beta-4) is a research-use-only peptide, so the COA is the whole conversation. A real one lists the batch, the purity, and the identity test — no COA, no order.
Last updated: 2026-08-21 · By: Index Peptides technical team
| 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 |
| Price | £29.99 per vial |
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.
Is TB-500 legal to buy in the UK?
TB-500 is supplied for in-vitro laboratory research use only and is not an approved medicine. Index Peptides does not supply it for human or animal use.
References
Research use only. Not for human or animal consumption.