About QSC | Research Peptide Manufacturer
Manufacturer · Partner Network · Distributor · 100+ Countries
About QSC
QSC is an international research peptide manufacturer and partner-sourced supplier. Core peptides are produced in-house in China via solid-phase peptide synthesis, while a vetted manufacturing partner network expands the catalog. Every product — whether in-house or partner-sourced — is verified at ≥99% purity and distributed from domestic warehouses in the USA, EU, UK, Canada, Australia, Singapore, Thailand, and Vietnam.
Manufacturer & Partner Network
In-house SPPS · Vetted manufacturing partners · Preparative HPLC · Mass spectrometry · Lyophilization
≥99% Purity
HPLC + MS verification · Janoshik COA on every product page · Uniform QC across all sources
8-Region Warehouses
USA · EU · UK · Canada · Australia · Singapore · Thailand · Vietnam — Domestic delivery, no customs
100+ Countries
China warehouse international shipping for remaining markets worldwide
What Is QSC?
QSC is a peptide-focused manufacturer and partner-sourced supplier specialising in high-purity research peptides and specialty research compounds. Founded in China, QSC has grown into one of the most recognised peptide suppliers in the global research community, supplying laboratories and distributors in more than 100 countries.
QSC operates a dual sourcing model. Core peptides are produced in-house — from raw amino acid starting materials through solid-phase peptide synthesis (SPPS), preparative HPLC purification, analytical verification, and lyophilization. To expand its catalog and meet growing demand, QSC also partners with rigorously vetted manufacturers.
Orders are fulfilled from the warehouse nearest to the delivery address based on inventory availability. If a product is not in stock locally, fulfillment is handled through QSC's China manufacturing facility.
Manufacturing & Partner Capabilities
In-House Synthesis
Automated SPPS (solid-phase peptide synthesis) · Custom peptide synthesis · Specialty research compounds · Raw peptide powders · Lyophilized formulations
Partner Network
Rigorously vetted manufacturing partners · Expanded compound catalog · Same QSC QC pipeline applied to all partner products · Full batch traceability
Unified Quality Control
Preparative and analytical HPLC · Mass spectrometry (MS) molecular verification · Impurity profiling · Full lyophilization production lines · Batch traceability · Identical QC process for in-house and partner-sourced products
Order Payment & Recharge
From checkout to delivery — here's exactly how every QSC order works.
Step 1 — Place Your Order
Add to cart
Browse and add items at qscpeptidew.com/shop
Checkout & Pay
QSC uses account balance for payment. Please complete account recharge first, then pay with your balance.
Order Confirmation
Orders are binding once payment is confirmed. All sales are final — no refunds are issued. QSC reserves the right to refuse, cancel, or limit orders at its discretion.
Tracking Email
Tracking info sent within 1–4 business days of payment receipt
Crypto orders are processed within 1–3 business days after payment is confirmed on the blockchain. SWIFT orders are processed after the wire clears (typically 3–5 business days).
Note: Cryptocurrency (BTC/USDT) is our preferred payment method and typically processes faster than SWIFT.
Please note:
- Include your Order Number in the payment reference/memo field
- Send in USD only
- International wire fees are the sender's responsibility
- Allow 3–5 business days for payment to clear
- If your bank asks for an intermediary bank, none is required
Step 2 — Delivery Timelines
๐บ๐ธ ๐ช๐บ ๐ฌ๐ง ๐จ๐ฆ ๐ฆ๐บ ๐ธ๐ฌ ๐น๐ญ ๐ป๐ณ Domestic Warehouse
Ships directly to your local carrier — no customs, no international transit.
3–7 business days
๐จ๐ณ China Warehouse
Used for international orders or when an item is out of stock at your regional warehouse.
7–14 business days
Local carrier tracking activates after customs clearance — no activity before that is normal.
Shipping Destinations
| Region | Warehouse | Delivery | Customs |
|---|---|---|---|
| ๐บ๐ธ United States | US Domestic | 3โ7 business days | None required |
| ๐ช๐บ European Union | EU Domestic | 3โ7 business days | None required |
| ๐ฌ๐ง United Kingdom | UK Domestic | 3โ7 business days | None required |
| ๐จ๐ฆ Canada | CA Domestic | 3โ7 business days | None required |
| ๐ฆ๐บ Australia | AU Domestic | 3โ7 business days | None required |
| ๐ธ๐ฌ Singapore | SG Domestic | 3โ7 business days | None required |
| ๐น๐ญ Thailand | TH Domestic | 3โ7 business days | None required |
| ๐ป๐ณ Vietnam | VN Domestic | 3โ7 business days | None required |
| ๐จ๐ณ All other countries | China (Direct) | 7โ14 business days | Varies by country |
Quality Verification Standards
Every QSC peptide batch โ whether in-house or partner-sourced โ is verified before distribution. Certificates of Analysis are published directly on each product page and independently verifiable via the Janoshik portal.
HPLC Purity
≥99% specification · Peak area analysis
Mass Spectrometry
Molecular identity confirmation
Impurity Profiling
Deletion sequences, oxidation products
Batch Traceability
Janoshik-verifiable COA per batch
Frequently Asked Questions
What is QSC?
QSC is a research peptide manufacturer and partner-sourced supplier based in China. Core peptides are produced in-house using SPPS, and QSC also partners with rigorously vetted manufacturers to expand its catalog. All products undergo the same QSC quality control process.
Is QSC a manufacturer or a reseller?
QSC operates as both a direct manufacturer and through a vetted partnership model. Core peptides are produced at QSC's China facility — synthesised, purified, verified, and lyophilized in-house.