SS-31 (CAS 736992-21-5): Import & Customs Guide for International Buyers

Executive Summary

This independent buyer guide covers SS-31 (CAS reference: 736992-21-5, approx. MW 627.8 Da, category: Longevity) for international laboratories sourcing research-grade material from Chinese manufacturers. Peptide From China publishes these guides to help buyers prepare customs documentation—not to sell product directly.

CAS and Product Identification on Invoices

Including CAS 736992-21-5 on commercial invoices and COAs helps customs brokers and couriers classify SS-31 consistently. If your supplier lists a research peptide without CAS, request sequence confirmation and MS identity data.

Browse catalog listing: /products/ss-31-10mg-chinese-manufacturer

Typical Research Specifications

• - Product: SS-31 lyophilized research peptide
• - CAS reference: 736992-21-5
• - Molecular weight (approx.): 627.8 Da
• - Intended use: Research Use Only (RUO) — in vitro / laboratory R&D
• - Not for human consumption, therapeutic, or cosmetic drug claims on import docs

Documentation Package for Customs

• - Commercial invoice with CAS (when applicable) and RUO statement
• - Packing list with vial quantities and batch/lot numbers
• - Batch COA: HPLC purity + MS identity matching expected MW
• - MSDS if requested by broker
• - Importer details matching your legal entity or customs agent

Shipping Considerations for SS-31

Lyophilized SS-31 typically ships via DHL, FedEx, or UPS. Confirm with your supplier whether ambient express is acceptable or if cold packs are recommended for your climate lane.

DDP vs Buyer-Cleared Import

• DDP — Supplier/freight partner pays duties to your door; confirm fee breakdown.
• DDU — You clear customs; more control, requires broker relationship.
• - Align payment terms with documented export readiness.

Quality Verification on Arrival

• - Match vial batch numbers to COA
• - Verify MW on MS report against theoretical ${p.mw}
• - Store per supplier guidance (often -20°C lyophilized)
• - Retain sample for dispute resolution

Regulatory Notice

Import rules for research peptides vary by country and change over time. Consult qualified customs and legal advisors. PeptideFromChina.com is an informational directory; products are for laboratory R&D only.

Get Supplier Introductions

Submit a procurement inquiry naming SS-31 and CAS 736992-21-5 for manufacturer matching through Peptide From China.