American Chemical Society | 261,790 followers on LinkedIn. Improving all lives through the transforming power of chemistry | The American Chemical Society (ACS) was founded in 1876 and is a congressionally chartered independent membership organization that represents professionals at all degree levels and in all fields of the chemical sciences. With more than 200,000 people in its global community, ACS is one of the world’s largest scientific societies and leading sources of authoritative scientific information. A nonprofit organization, ACS is at the forefront of the evolving chemistry enterprise and is the premier professional home for chemists, chemical engineers and related professionals around the globe.