About QSC (Qingdao Sigma Chemical)
You’ve likely seen QSC referenced across peptide forums and sourcing discussions. QSC (Qingdao Sigma Chemical) has become one of the most recognized peptide suppliers within the global research community.
QSC operates under a structured sourcing model that combines direct manufacturing with international warehouse distribution, ensuring both competitive pricing and reliable fulfillment.
Warehouse & Shipping Model
QSC maintains warehouse inventory in:
- United States
- United Kingdom
- European Union
- Australia
- Canada
If inventory is available in your local warehouse, your order ships domestically.
- No international customs clearance
- Local courier tracking
- Typical delivery: 3–7 business days
- Reduced transit uncertainty
If an item is not stocked locally, fulfillment is handled directly from the China warehouse.
QSC ships from China to the following countries:
- United States
- United Kingdom
- Canada
- European Union countries
- Australia
- South Korea
- Brazil
- Russia
- Kazakhstan
- Thailand
What Is QSC?
Qingdao Sigma Chemical is a peptide-focused manufacturer serving research institutions, distributors, and commercial partners in over 100 countries.
Manufacturing operations are based in China and utilize solid-phase peptide synthesis (SPPS), advanced purification systems, and comprehensive analytical testing. Regional warehouse support enhances delivery speed and supply continuity.
Manufacturing Capabilities
- Research-grade peptides
- Custom peptide synthesis
- Lyophilized formulations
- Raw peptide powders
- Specialty research compounds
Quality control infrastructure includes automated synthesis systems, preparative and analytical HPLC, mass spectrometry verification, and full lyophilization production lines. Certificates of Analysis (COAs) are available on product pages for transparency.
Ordering Process
- Browse products at qsc-usa.com
- Add products to cart
- Proceed to checkout
- Complete cryptocurrency payment (Bitcoin or USDT ERC-20)
- Receive confirmation and tracking via email
Orders can also be tracked within your account dashboard once shipped.
Quality Verification
All products are labeled for research use only and typically specify ≥98% purity.
Independent third-party laboratories conduct:
- HPLC purity analysis
- Mass spectrometry verification
- Impurity profiling
Certificates of Analysis are published directly on product pages for batch transparency.
Safety & Legal
All products are sold strictly for research purposes only and are not approved for human consumption. Researchers are responsible for understanding local regulations and proper storage requirements.
Contact
Website: https://qsc-usa.com
Email: support@qsc-usa.com