Cato research chemicals Inc. is a national high-tech enterprise focusing on customized synthesis of small molecular compounds, Cato is also the advanced company of China's scientific and technological innovation, the member of Expert Advisory Committee of China Standardization Committee. We have a strong analytical chemistry team to support synthetic chemistry services. We are committed to providing customers with high-quality and high-value products and services through prolific, fast, problem-solving and active communication.

  • Transparent High standard production

    From milligram level to the hundred kilogram level, we have our own production workshop, which meets GMP quality standards, and the whole process of operations is transparent. Impurity and purity control comply with USP/EP/CP standards to ensure the safety and reliability of medicines.
  • International quality management system

    Establish a quality assurance system according to the mainstream market needs such as the FDA system of the United States and the European Union, which covers 13 quality control fields and full cycle supervision and traceability to meet the needs of factory audit and inspection.
  • Intact testing data

    CNAS compliant testing laboratory with full set of testing equipment, which can provide global regulatory testing projects according to customer needs, ensure the integrity of testing data and help pharmaceutical research and development.



The main members of the customized synthesis team come from international pharmaceutical companies and CRO enterprises, with decades of experience in complex compound synthesis. CATO masters core technologies in critical technological areas such as high-end fluorine chemistry, asymmetric chiral synthesis, glycoside and biological enzyme technology, and continuous micro-reactors. By 2020, Cato has perfectly completed more than 1000 projects for domestic and international customers.

customized synthesis case :

  • Abemaciclib International
  • Abiraterone International
  • Fenoterol International
  • Entacapone International
  • Flumequine International
  • Catharanthine International
  • Carfilzomib International
  • Azelnidipine International
  • Dexmedetomidine International
  • Aripiprazole International
  • Felbamate International
  • Tropicamide International


CATO synthesizes various small molecule chemical substances such as reference compounds, intermediates, candidate drugs, impurities and metabolites for customers, and its scale ranges from milligrams to hundreds of kilograms (including GMP quality). Our team is proficient in new route design and route optimization. With the proficient problem solving skills and high success rate, we are able to provide customers with the following high-quality chemical custom synthesis services.

  • Production of milligrams to hundreds of kilograms products
  • Preparation of special reagents, intermediates and molecule segments
  • Production of APIs and related chemicals
  • Design and synthesize impurities and its metabolites
  • Analytical services
  • File analytical reports

Cato, with the premium national detection level and international technical service capabilities, provides customers with customized synthesis of compounds, chemicals, peptides, protein,pharmaceutical intermediates, generic drug, and CRO services..

Dr. Liang Head of Custom Synthesis Technology