Procurement · 6 min read
Choosing a Research Peptide Supplier: A 10-Point Checklist
A procurement checklist for laboratories evaluating research peptide suppliers: testing, traceability, documentation, shipping, and purchasing terms.
Research peptides are sold by hundreds of online vendors, and quality varies widely. This checklist is written for lab managers and principal investigators qualifying a new supplier.
The checklist
- Certificates are lot-specific and posted before purchase, not on request.
- Testing is performed by a named third-party laboratory with ISO/IEC 17025 accreditation.
- Each certificate reports HPLC purity with a chromatogram and LC-MS identity.
- Net peptide content is disclosed, not just purity.
- Endotoxin, microbial, and heavy-metal screens are reported with limits.
- Vial labels carry lot numbers that match the certificate, ideally with a scannable link.
- The supplier states a minimum purity release standard and does not ship lots that fail it.
- The supplier sells for research use only, verifies buyers, and does not give use or dosing guidance.
- Shipping includes tracking and protection against loss or damage.
- Volume pricing and purchase-order options exist for recurring lab orders.
Red flags
- A single generic certificate reused across lots
- Purity figures with no chromatogram
- No named testing laboratory
- Marketing that describes effects in people or animals
- Dosing charts, protocols, or calculators
North Wall is built around this checklist. See our testing panel, the COA library, and bulk ordering.
Educational content for laboratory professionals. North Wall products are for in-vitro research only and are not for human or veterinary use.