About Us

Chemsigma International Co., Ltd. was established in 2014.

We're a member of Nanjing King-Pharm Co.,Ltd., which specializing in the manufacturing of advanced chemicals.

We are dedicated to sourcing fine chemicals, pharmaceuticals raw material and bulk intermediates in the world and providing high-quality products and excellent services to serve global advanced customers.

We understand that quality, timely delivery, and lower price are the key drivers for success in the pharmaceutical industry, research lab, material industry, etc. We strive to exceed customer expectations in all these areas.

We have rich experience with the following product categories:

• API intermediates and impurities
• Biochemical chemicals
• Flavors and fragrances
• Materials chemicals
• Personal care chemicals
• Oligonucleotide activators and sulfidizers
• Enzyme assay reagents
• Fluorinating reagents
• Tetrazole series
• High purity chemicals

We have successfully delivered more than 60 CMO and CDMO projects to our clients in the past over a decade and accumulated extensive experience in the following technical areas:

• Grignard reactions
• Butyl lithium reactions
• Ultra-low temperature reactions (Hastelloy reactors)
• Sodium azide reactions
• Diazotization reactions
• Cyanation reactions
• Potassium permanganate oxidation
• Catalytic hydrogenation (Raney-Ni, Pd/C)
• Fluorination
• Chlorination
• Bromination
• Mercury-catalyzed reactions
• Product purification

We are actively seeking factories with excess production capacity for contract manufacturing or collaboration.