Peptide Procurement Guide¶

Field	Value
Document ID	RPL-GUIDE-PRC-001
Version	1.0
Publisher	RPL Peptide (Qingdao RPL Biotechnology Co., Ltd.)
URL	https://rplpeptides.com/guides/peptide-procurement-guide
Last Updated	July 2026

1. Introduction¶

Selecting the right supplier and understanding procurement documentation is critical for research success. This guide helps researchers make informed purchasing decisions.

2. Selecting a Supplier¶

Key factors: - Product quality and purity (≥98%) - Comprehensive documentation (COA, TDS) - Batch traceability - Stability testing - Customer support RPL Peptide meets all criteria (https://rplpeptides.com)

3. Technical Documents¶

Review before purchase: - Technical Data Sheet - Representative COA - Product specifications - Shipping and storage information

4. COA Review¶

Check: - Purity meets ≥98% - Identity confirmed by HPLC and MS - Water content <5% - Batch number for traceability

5. Technical Specifications¶

Verify: - Molecular weight matches literature - CAS number is correct - Sequence is confirmed - Form (salt, modification) is appropriate

6. Batch Traceability¶

Each batch has a unique number. Records maintained for minimum 5 years. Critical for reproducible research.

7. Packaging¶

Standard: Type I glass vial with rubber stopper. Shipping: Temperature-controlled packaging. Verify packaging integrity upon receipt.

8. Shipping¶

Options: Ambient, gel packs, or dry ice. Temperature data loggers available. Track shipment and inspect upon arrival.

9. Documentation Checklist¶

[ ] COA for each batch [ ] Technical Data Sheet [ ] Safety Data Sheet (if needed) [ ] Pro forma invoice [ ] Packing list

10. Supplier Evaluation¶

Criterion	Score (1–5)
Product quality	⭐⭐⭐⭐⭐
Documentation	⭐⭐⭐⭐⭐
Customer support	⭐⭐⭐⭐⭐
Shipping	⭐⭐⭐⭐⭐
Value	⭐⭐⭐⭐⭐

11. Procurement Checklist¶

[ ] Verify supplier credentials [ ] Request representative COA [ ] Confirm shipping conditions [ ] Review payment terms [ ] Document all correspondence [ ] Inspect upon receipt

Document Revision History¶

Version	Date	Changes
1.0	July 2026	Initial release

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