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Nantong Guangyuan Chemical 南通广源化工

Direct manufacturer & exporter of research-grade compounds from Nantong, China

350+ Products
99.5%+ Avg Purity
Janoshik Tested
4.9/5 Reviews

Company Profile

GYC Nantong Facility

Nantong Guangyuan Chemical Co., Ltd. (GYC) is a professional manufacturer and exporter of peptides, SARMs, anabolic compounds, raw powders and related supplements. Based in Nantong, China, we offer direct factory pricing with comprehensive international logistics.

We've served thousands of customers across the US, Europe, Australia, and beyond. Our direct-from-manufacturer model means you get the best pricing without middlemen or resellers inflating costs.

Your Contact

Our dedicated sales representative is available 7 days a week to help with orders, product questions, and after-sale support.

Glisa

Glisa

Fastest
Sales Manager

Orders, custom synthesis, OEM partnerships, bulk pricing, and all enquiries.

Manufacturing Excellence

Our facility features GMP-standard production lines for peptide synthesis, tableting, and oil formulation. We handle everything from raw material sourcing to final product packaging, ensuring quality control at every step.

Peptide Synthesis
Packaging

Quality Assurance

Every product we sell is independently tested by Janoshik Analytical — the most trusted independent laboratory in the research chemical industry. We don't just claim quality; we prove it with transparent, verifiable data.

HPLC Analysis
Purity Testing

99.5%+ Average Purity

Consistently verified across all products — peptides, orals, injectables, and raw materials.

Janoshik Test Reports

Every batch tested and documented. Full HPLC & mass spectrometry analysis by Janoshik Analytical.

Certificate of Analysis (COA)

A COA is available for every product we sell. Request it anytime — full transparency, no exceptions.

Certifications & Awards

Nantong Guangyuan Chemical (GYC) and our parent company hold numerous certifications and government-recognized awards — reflecting decades of pharmaceutical-grade manufacturing excellence.

🏆

Top Peptide Synthesis Solution in Asia — 2026

GYC was officially awarded the Top Peptide Synthesis Solution in Asia 2026 by Life Sciences Review (ISSN 2831-8331), a globally authoritative media outlet, in recognition of its profound technological expertise, unwavering commitment to quality, and outstanding global service capabilities in the field of peptide synthesis.

Shanghai Science & Technology Progress Award
Shanghai Science & Technology Progress Award

上海市科学技术进步奖 · Third Prize · 2008

A prestigious government science award granted by the Shanghai Municipal People's Government. Awarded for the project "New Process for the Cyclic Peptide Drug Eptifibatide" — recognizing a breakthrough in cyclic peptide manufacturing that improved synthesis efficiency and yield for this critical antiplatelet drug.

SGS ISO 9001:2015 Quality Management Certificate
SGS ISO 9001:2015 — Quality Management

质量管理体系认证 · Certified by SGS

The international gold standard for quality management systems. Issued by SGS — the world's largest inspection, verification, and certification company. This certifies that every stage of production, from raw materials to final product, follows documented, audited quality procedures.

OHSAS 18001 Occupational Health & Safety Certificate
OHSAS 18001 — Occupational Health & Safety

职业健康安全管理体系认证 · GB/T 28001

An internationally recognized workplace safety standard. This certification proves the facility maintains rigorous health and safety management systems to protect workers — a requirement for responsible pharmaceutical manufacturing and chemical handling operations.

ISO 14001 Environmental Management Certificate
ISO 14001 — Environmental Management

环境管理体系认证 · GB/T 24001 · Issued by CAC

The global standard for environmental management. Certified by CAC (China Quality Certification Centre), this confirms the facility meets strict environmental protection requirements — including proper waste disposal, emission controls, and sustainable manufacturing practices for chemical production.

Drug Production License
Drug Production License

药品生产许可证 · Valid through 2025

An official government-issued license required to legally manufacture pharmaceutical products in China. Issued by provincial FDA-equivalent authorities, it certifies the facility meets GMP (Good Manufacturing Practice) standards for producing Active Pharmaceutical Ingredients (APIs). Only facilities that pass rigorous government inspections receive this license. GYC's Binhai subsidiary also holds its own separate Pharmaceutical Production License.

Drug Production Permit — Binhai Subsidiary
Pharmaceutical Production License — Binhai Subsidiary

药品生产许可证 · Binhai (滨海)

A separate Pharmaceutical Production License held by GYC's Binhai subsidiary. This confirms the company operates multiple GMP-compliant production facilities — expanding manufacturing capacity while maintaining the same strict government-regulated quality standards across all sites.

Shanghai Patent Work Pilot Enterprise Certificate
Shanghai Patent Work Pilot Enterprise

上海市专利工作试点企业 · 2014

A title awarded by the Shanghai Intellectual Property Bureau to companies demonstrating exceptional patent activity and innovation. This recognizes GYC's strong portfolio of proprietary peptide synthesis technologies and original pharmaceutical research — showing the company actively develops and protects its own intellectual property.

National High-Tech Enterprise Certificate
National High-Tech Enterprise

高新技术企业证书 · National Level · 2017

A highly selective national-level designation jointly administered by China's Ministry of Science & Technology, Ministry of Finance, and State Taxation Administration. Companies must demonstrate significant R&D investment, proprietary intellectual property, and cutting-edge technological capabilities. Only ~7% of applicants qualify — confirming GYC operates at the frontier of pharmaceutical science.

Shanghai Science & Technology Little Giant Enterprise
Shanghai Science & Technology Little Giant Enterprise

上海市科技小巨人企业 · 2018

An elite designation from the Shanghai Municipal Commission of Science and Technology, awarded to fast-growing technology companies with exceptional innovation capability and market competitiveness. "Little Giant" enterprises are recognized as future industry leaders — companies that punch far above their weight in technological output relative to their size.

Innovative Enterprise Certificate
Innovative Enterprise

创新型企业 · 2012

Awarded jointly by Shanghai's Commission of Economy and Information, Commission of Science and Technology, and Finance Bureau. This government-backed title recognizes enterprises that have built innovation into their core business strategy — with proven track records of developing novel products, processes, and technologies in pharmaceutical chemistry.

Buyer Protection

100% Delivery Guarantee

If your package is seized or lost in transit, we reship at no extra cost — no questions asked. We've maintained this policy since day one.

60-Day Refund Policy

Not satisfied? Choose a full refund, free replacement, or 110% store credit. We stand behind everything we sell.

Secure Payments

256-bit encrypted checkout supporting Visa, Mastercard, Apple Pay, Google Pay, bank transfer, and cryptocurrency.

Discreet Packaging

Plain, unmarked packaging with no product labels, company branding, or identifiable markings.

Product Categories

Peptides

180+ products

GLP-1 agonists, growth hormones, healing compounds, blends, bioregulators

Oral Tablets

80+ products

SARMs, anabolics, PCT support, nootropics, weight loss

Injectable Oils

70+ products

Testosterone, trenbolone, nandrolone, specialty blends, lipo formulations

Raw Materials

30+ products

Bulk powders for manufacturing

Why Choose GYC?

Direct Manufacturer

No middlemen, best factory pricing

Janoshik Tested

99.5%+ purity verified by Janoshik Analytical. Janoshik test reports.

350+ Products

Comprehensive catalog

Worldwide Shipping

Reliable international logistics

Buyer Protection

100% delivery guarantee, free reshipping, easy refunds

Bulk Discounts

Volume pricing available

Ready to Order?

Explore our complete range of 350+ research compounds or get in touch with our team for custom orders and bulk pricing.