Wholesale Research Peptide Supplier Checklist
Buyer guide · Supplier due diligence
Use this checklist to organize a supplier conversation before requesting a wholesale quotation. It is intended for research-use procurement and does not make medical or therapeutic claims.
1. Product and specification
Product name, code and physical form
Available pack sizes and packaging format
Batch documentation and stated analytical methods
Storage and handling information supplied with the product
2. Commercial terms
Minimum order quantity and sample policy
Quotation validity and payment terms
Production or preparation lead time
Replacement process for documented shipping damage or discrepancy
3. Documentation
COA or batch report linked to the supplied batch
Product and package labels that match the order
Commercial invoice and packing list
Shipping and customs documents where applicable
4. OEM and private-label questions
Label and packaging formats available
Artwork review and approval process
MOQ for custom packaging
Lead time for a repeat order
Prepare a quotation request suppliers can compare
Send the same requirements to each supplier and compare the written responses. Keep catalogue quantity, batch assay results and delivery commitments in separate fields.
- Product: exact name, material form and catalog code; list each specification separately.
- Quantity: vial count and box count for finished packs, or total mass and container size for bulk material.
- Documentation: proposed batch reference, available COA, analytical methods and any separately required content result.
- Packaging: standard packaging or custom labels/boxes, with artwork and approval requirements.
- Destination: country and delivery requirements; ask who is responsible for the applicable import documentation.
- Commercial response: minimum quantity, quote validity, payment terms, preparation time and shipping cost.
Worked example: keep two vial formats separate
For a Semaglutide quotation, list “SM10: 2 boxes, 10 vials per box” and “SM20: 1 box, 10 vials per box” as separate lines. This requests twenty vials labelled 10 mg and ten vials labelled 20 mg. It does not specify a bulk-material order or establish measured content. Ask the supplier to confirm the batch, availability and documents for each line.
Resolve differences before selecting an offer
A lower price is not directly comparable if the material form, vial count, testing scope or shipping terms differ. Record unanswered questions, obtain written clarification and retain the final quotation with the batch-document review. If the inquiry is for bulk material or custom packaging, use the raw-material route or private-label route rather than assuming the vial terms apply.
5. Communication and verification
Use a business email, keep the quotation and documentation together, and ask for clarification when product names, batch numbers or test details do not match. A clear supplier should be able to explain what is included in a quotation and which documents are available.
See the COA verification guide, third-party testing information and wholesale supply overview. For product-specific procurement details, review our Retatrutide wholesale supplier page and Tirzepatide wholesale supplier page. For bulk API/raw-material sourcing, review Liraglutide API, Semaglutide API, Tirzepatide API and Retatrutide API.
Use one request and record each supplier response
Download the worksheet and send the same material, quantity, documentation and destination requirements to each supplier. Keep the written answers with the quotation, and identify unresolved differences before accepting an offer.
Download the RFQ worksheet (.txt) ↗Choose the correct purchasing route
- Bulk raw material: total mass in mg/g/kg, container requirements and proposed-batch documents.
- Catalog research vials: catalog code, strength, vials per box and box count.
- Sequence-defined synthesis: non-confidential project summary, target quantity, purity and requested modifications for review.
- Private-label packaging: product, quantity, label or outer-box requirements and artwork status.
Review documentation categories · Prepare a US destination request