There are 40-50 categories of fine chemicals in the world, with more than 100,000 varieties. Fine chemicals are used in all aspects of daily life, such as medicine, dyes, pesticides, paints, daily necessities, electronic materials, paper chemicals, inks, food additives, feed additives, water treatment, etc., also in aerospace, biotechnology, Information technology, new materials, new energy technology, environmental protection and other high-tech aspects are widely used.

There are many varieties of fine chemicals, and the same intermediate product can be extended to several or even dozens of derivatives with different uses through different technological processes. The production process is complex and changeable, and the technology is complex. All kinds of fine chemical products need to go through laboratory development, small test, pilot test, and then to large-scale production. They also need to be updated or improved in time according to the changes in the needs of downstream customers. Continuously improve the process during the process and accumulate experience. Therefore, the enterprise's derivative development of fine chemical products in subdivided fields, accumulation of experience in production processes and innovative capabilities are the core competitiveness of a fine chemical enterprise.

The production process involved in fine chemical products is long, and it requires multiple multi-unit operations. The manufacturing process is more complicated. During the production process, mild reaction conditions, a safe operating environment, and specific chemical reactions are required to achieve chemicals. It is easy to separate and the product yield is high, which requires a high level of process technology and reaction equipment. Therefore, fine chemical products generally have higher added value.

In practical applications, fine chemicals appear as comprehensive functions of products. This requires screening different chemical structures in chemical synthesis, and fully exerting the functions of fine chemicals in the production of dosage forms in collaboration with other complex substances. The demand for fine chemical products in industrial production is diverse, and it is difficult for a single product to meet the needs of production or use. Taking the company's water treatment industry as an example, the special chemicals used in this field include sterilization and algaecide Scale agent, corrosion inhibitor, flocculant, etc., and the chemical preparation for each purpose can be compounded by several chemical agents.