A chemical compound is a chemical substance composed of many identical molecules (or molecular entities) composed of atoms from more than one element held together by chemical bonds. A molecule ...

Chemical Abstracts Service, a division of the American Chemical Society, announced that on September 7 it recorded the 50 millionth substance in CAS, the world's most comprehensive and high-quality ...

On May 8, CAS registered its 150 millionth unique chemical substance—a 2-pyrimidinamine carbonitrile derivative, one of several promising compounds studied as inhibitors of two kinases (TBK and IKK) ...

A compound is a substance that is formed when two or more different chemical elements bond together in a fixed ratio, like water (H₂O) from hydrogen and oxygen or salt (NaCl) from sodium and chlorine.

A chemical compound is a chemical substance consisting of two or more different chemically bonded chemical elements, with a fixed ratio determining the composition. The ratio of each element is ...