> For the complete documentation index, see [llms.txt](https://docs.rplpeptides.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.rplpeptides.com/docs/guides/peptide-procurement-guide.md).

# 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 |

***

© 2026 RPL Peptide

rplpeptides.com


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