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 ...

A chemical substance is a form of matter having constant chemical composition and characteristic properties. Some references add that chemical substance cannot be separated into its constituent ...

There are lots of different substances but only just over a hundred elements. An element is a substance that is made up of only one kind of atom. The atoms in a particular element are the same as each ...

All substances have properties. These describe how a substance looks and behaves. There are two types of properties: physical and chemical. Watch this video about how physical and chemical properties ...

Every country has a published controlled substance list, but the named substances are only common examples. The list also covers analogs and defined chemical space around these substances, which ...

Chemical Reactions: A chemical reaction is a process where the substances 8unbdergo a change in their chemical composition. The substances that enter the reaction are called reactants that are then ...

New database containing more than 600,000 chemical structures gives companies a unique opportunity to quickly get an overview of the harmful effects associated with substances they are considering ...