UK Peptides
Long-established UK research-peptide supplier with the largest publicly browsable certificate library found on this list.
www.uk-peptides.com →Recorded attributes
- Stated purity
- >99% headline; per-lot certificates range from ≥95.0% to ≥99.9%
- COA access
- Public library
- Testing method
- Purity by HPLC (area %); identity confirmed by mass spectrometry. Certificates described as in-house
- Product format
- Lyophilised powder
- Dispatch
- Orders placed before 3pm dispatched the same day
- UK-based
- Yes
- Company number
- 08033431 (Starflex Systems Ltd), VAT 271775577
- Catalogue size
- ~139 products
Recorded from UK Peptides’s own public website on 29 Jul 2026. “Not stated” means we did not find the information on their site, not that it is absent from their business. Details change — verify anything that matters directly with the supplier. UK Peptides and any related marks are the property of their owner.
Notes
- 87 certificate documents are downloadable without a login — the largest open library found here.
- Certificates are described as in-house rather than third-party.
- Per-lot purity figures vary considerably and are lower for some lots than the headline figure suggests.