In everyday life, for example on food packaging, the word ‘pure’ usually means that something is in its natural state without anything added to it, like sweeteners or preservatives. Natural fruit ...

A chemical compound is a naturally occurring pure substance formed by some suitable means such as exchange or sharing of electrons among elements. Atoms of elements combine with each other in a ...

Chemical purity is the most important quality characteristic of a pharmaceutical substance. This article describes the latest scientific and technological advances to meet recent pharmacopoeial and ...

At the request of the United Nations Educational, Scientific and Cultural Organisation, and by agreement with the International Union of Chemistry, the International Bureau of Physico-Chemical ...