Buy PT-141 UK — What to Check Before You Order
PT-141 is a cyclic melanocortin analogue, and the checks that matter are the same as for any research peptide: a batch-level COA, identity confirmation, and a CAS number that matches the catalogue entry. Start there, not with the marketing copy.
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 |
|---|---|---|---|---|
| PT-141 | 10mg per vial | £18.99 | Out of stock | IP-PT10-001 |
1. The paperwork is the product
PT-141 is supplied strictly as a research chemical for in-vitro laboratory research, so the difference between one supplier and another is documentation. A supplier that publishes a certificate of analysis for the specific batch it ships is operating on a different standard from one that forwards a generic image after payment.
2. Identity confirmation matters more than size
PT-141 (bremelanotide free-acid derivative) is a cyclic peptide, CAS 189691-06-3. Identity confirmation by LC-MS — comparing detected mass against expected mass — is what tells you the vial actually contains the cyclic structure claimed. A purity percentage with no identity confirmation is an incomplete picture.
3. Check the COA against the batch number
A certificate is only meaningful if it belongs to the vial you receive. The lot number on the vial must match the lot on the certificate, and the certificate should be checkable independently — enter the lot number on a public batch-verification page and the record comes back with the purity, identity and test date for that specific batch.
4. UK dispatch and the research-use boundary
UK-based dispatch avoids customs uncertainty on research materials, and a credible supplier states plainly that products are for in-vitro laboratory research only — never for human or animal use.
How to order from Index Peptides
PT-141 is available as a 10mg vial, with the certificate of analysis published on the product page and every released batch checkable by lot number on the verify page. Order online at checkout, or request an invoice for lab and institutional orders.
Frequently asked questions
What should a PT-141 COA show?
The batch/lot number, HPLC purity, LC-MS identity confirmation, the testing lab and the test date — and it must match the vial you receive.
What is the CAS number for PT-141?
189691-06-3, with a molecular weight of approximately 1025.2 g/mol for the cyclic form.
Who can buy PT-141 from Index Peptides?
Index Peptides supplies PT-141 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.