What organization is cas?

CAS is an American Chemical Abstracts Service, located in Columbus, Ohio, USA. It is a branch of the American Chemical Society and is responsible for sorting out and distributing chemical abstracts and related products. Chemical Abstracts Service provides the world's largest publicly disclosed chemical-related information database, and provides related literature retrieval software, providing users with links to original documents and patents.

Chemistry is a natural science, which mainly studies the composition, properties, structure and changing rules of substances at the molecular and atomic levels, and creates new substances. The world is composed of matter, and there are two main forms of change (including chemical change and physical change). Chemistry is one of the main ways and means for human beings to understand and transform the material world. Chemistry is a discipline with a long history and full of vitality, and its achievement is an important symbol of social civilization.