The main data sources for providing MSDS are chemical manufacturers and MSDS suppliers. The former is a manufacturer that produces chemicals that can make their MSDS, such as fishermen's science. Manufacturers of mainstream chemicals or reagents provide MSDS data of chemicals free of charge, and at the same time provide product catalogues. However, due to the large number of global chemical manufacturers, such data sources are scattered. The latter is an MSDS provider, which collects MSDS for others to search, such as chemexper. This kind of data source can provide MSDS of many manufacturers, and the data is relatively concentrated, but only partially free. Because making MSDS requires a certain amount of manpower, material resources and financial resources, we can not only obtain the required MSDS from MSDS suppliers by paying, but also obtain it by searching the existing MSDS data sources on the network. Although the retrieved MSDS file cannot be directly used as a legal document, it is of great reference significance to those who use MSDS. At present, the basic situation, retrieval method, language, MSDS and MSDS of MSDS database on the network.

The data scale (i.e. composite coverage) can be summarized as table 1.