Direct Manufacturer — Janoshik Analytically Tested

Research-Grade Compounds, Factory Direct Pricing

350+ Janoshik-tested peptides & research compounds with 99.5%+ verified purity. Ships worldwide with full COA documentation and HPLC reports.

View Research Catalog Browse Compounds

Janoshik Tested — 99.5%+ Purity

Full COA Documentation

700+ HPLC Reports

Prosperity Sale

Volume discounts on all orders

Orders $500+ 5% OFF + Free Express

Orders $1,000+ 10% OFF

Orders $2,500+ 20% OFF

Orders $10,000+ 50% OFF + Wholesale Group

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Why Researchers Choose QSC

Direct manufacturer committed to 99.5%+ purity, Janoshik-verified testing, full COA documentation, and research-grade standards

Janoshik Analytical Testing

Every batch is independently verified by Janoshik Analytical — the industry-leading independent laboratory trusted worldwide. 99.5%+ purity guaranteed across 700+ published HPLC & mass spectrometry test reports. View all test reports →

99.5%+ Purity Guaranteed

Stringent quality control from synthesis through packaging. Every compound verified to 99.5%+ purity by Janoshik Analytical with full Certificate of Analysis (COA) documentation provided per batch.

Global Shipping

Worldwide delivery with 100% delivery guarantee. If your package is lost or seized, we reship at no extra cost — no questions asked.

Factory-Direct Pricing

As a direct manufacturer, we offer competitive pricing without middleman markup. Bulk and institutional discounts available on all orders.

Dedicated Support

Our team assists with technical inquiries, Janoshik COA requests, purity verification questions, and bulk orders via email, Telegram (@traceyqsc), and WhatsApp.

Secure Ordering

Pay securely with Visa, Mastercard, Apple Pay, Google Pay, bank transfer, or cryptocurrency (10% discount). Full data privacy protection on every transaction.

How to Order

Simple ordering process for research facilities and qualified buyers

Browse Catalog

Explore our full research compound catalog at qingdaosigmachemical.net

Place Your Order

Select compounds and quantities, then checkout securely

Tracked Delivery

Receive your shipment with full tracking and documentation

Important Notice — Research Use Only

All products sold by Qingdao Sigma Chemical Co., Ltd. are intended strictly for laboratory and research use only.
Products are not for human consumption. Not intended for use in food, drugs, cosmetics, or medical devices.
Products are not intended to diagnose, treat, cure, or prevent any disease.
These products have not been evaluated or approved by the FDA or any other regulatory authority for human use.
By purchasing from QSC, the buyer confirms that products will be used solely for legitimate research purposes in compliance with all applicable local, state, and federal laws.

Contact QSC — Official Representative

Tracy

Official Rep

Sales Director & Sole Official Representative

Tracy handles all orders, wholesale & bulk enquiries, custom synthesis, OEM partnerships, shipping updates, and after-sale support. She is the only official QSC representative — do not trust anyone else claiming to represent QSC.

Telegram @traceyqsc WhatsApp +1 (341) 345-8639 alisayang@qingdaosigmachemical.net

Security Notice: Tracy is the only official QSC representative. If someone else contacts you claiming to be from QSC, it is a scam. Always verify you are speaking to @traceyqsc on Telegram or +1 (341) 345-8639 on WhatsApp.