The general public often construes the word "chemical" to mean a harmful synthetic substance. In fact, however, the term applies to any element or compound, either natural or synthetic. The thousands of compounds that make up the human...

A chemical substance is a material with a definite chemical composition. It is a concept that became firmly established in the late eighteenth century after work by the chemist Joseph Proust on the composition of some pure chemical compounds such as...

Familiarity with the scientific and technical literature regarding the specifications of chemical substances for pharmaceutical use is of primary importance, particularly for those working in QA/QC, production and formulation development. In this article, adopted technical guidelines, relevant pharmacopoeial general monographs and chapters as well...

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 regulatory requirements regarding the control of organic impurities in synthetically produced active substances. Future developments and suggestions for...