10 Facts About Chemical substance

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 elements by physical separation methods, i e, without breaking chemical bonds.

However, in practice, no substance is entirely pure, and chemical purity is specified according to the intended use of the chemical.

But, there are exceptions to this definition; a pure Chemical substance can be defined as a form of matter that has both definite composition and distinct properties.

The chemical substance index published by CAS includes several alloys of uncertain composition.

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An element is a chemical substance made up of a particular kind of atom and hence cannot be broken down or transformed by a chemical reaction into a different element, though it can be transmuted into another element through a nuclear reaction.

Chemical compound is a chemical substance that is composed of a particular set of atoms or ions.

However, tautomers are an exception: the isomerization occurs spontaneously in ordinary conditions, such that a pure Chemical substance cannot be isolated into its tautomers, even if these can be identified spectroscopically or even isolated in special conditions.

In contrast, if iron and sulfur are heated together in a certain ratio, a chemical reaction takes place and a new substance is formed, the compound iron sulfide, with chemical formula FeS.

Every chemical substance has one or more systematic names, usually named according to the IUPAC rules for naming.