APIs and API intermediates

We are able to provide the services of intermediates and APIs’ process development and scale up production. They include the laboratory works such as process R&D and small scale synthesis of APIs which are used for drug candidate selections, GLP toxicology studies, preclinical and pre-formulation studies. Our professional services ensure on-time delivery of cost-effective and high quality chemicals to meet the clients’ aggressive timelines. Our services further extend to relatively large scale kilo lab synthesis by efficient scale up of existing route. With the support of our cooperators, chemexpress also has the capability of cGMP kilo lab and Pilot Plant manufactures which meet the western standards.


Manufacture of APIs and intermediates from gram to kilo scales

On-time delivery of low cost and high quality chemicals

Process development

The process R&D team of chemexpress consists of a number of chemical experts, who can ensure efficient and professional service of process development.

  • Two separate kg level laboratories
  • Rapid process R&D
  • Kg level SFC chiral compound separation capability
  • Process safety assessment
  • Process analysis development support
  • Integrated technical support and plant production
  • Commercial process development for advanced intermediates and APIs

cGMP kilo lab and Pilot Plant facilities built to western standardsrooted in our quality professional service and scientific innovation. Since its founding, chemexpress has been devoting itself to developing self-owned technologies and realizing science and technology industrialization to meet all customers’requirements.

Vitamin D series compounds

chemexpress has a professional, efficient and outstanding scientific research team with strong innovation capabilities. By virtue of years of R&D experience, we are engaged in synthesis of highly active VD analogues. We are committed to meeting different customers’ needs, including production of kg level advanced intermediates, customization and development of mg level new VD analogues, research and development of new process of existing API VD analogues, and development of highly active VD compounds reported lately. We always work closely with our analytic department to ensure the highest quality for our valuable clients.

  • Design and synthesis of diversified database compounds
  • Design, synthesis and analysis of using chemical informatics to assist compound library
  • Design and synthesis of diversified chemical library. We can provide more than 20 highly active VD analogues and over 100 advanced intermediates.
CRO Building Blocks

chemexpress has excellent experienced technical staff, which can develop feasible and efficient chemical synthetic route timely. We have been providing our customers with cost-effective and high quality services of CRO building blocks since 2005. With rich experiences in customized chemical synthesis, we ensure on-time delivery of diversified compounds to meet all clients’ different requirements. We can also research and develop chrial compounds and new compound molecules according to each customer demands. For businesses in development, synthesis and analysis fields, chemexpress arranges laboratory projects systematically and rationally, and fully grasp the planning and flexibility features of R&D, in order to meet customers’ standards of time, quality and cost control.

  • Design and synthesis of diversified database compounds
  • Design, synthesis and analysis of using chemical informatics to assist compound library
  • Design and synthesis of diversified chemical library.

(Annual production capacity of compound library is more than 10,000 compounds; the synthesis amount of each compound is bigger than 20 mg; the purity is more than 85%)

CRO Life Bioscience Compounds

We can order timely high quality and efficient services of various compounds from mg to kg level for some clients’ bioscience research. We are committed to researching and developing reference compounds with high synthesis technology barriers and difficulties. We also focus on chiral synthesis and separation. Often working under very short lead time, chemexpress staff is trained to focus efforts quickly to produce the required compounds.