Chemistry and Chemical Disasters. A compound (or molecule) is a combination of two or more different chemical elements (atoms) held together by chemical bonds
The Association of Petrochemicals Producers in Europe (APPE), The European petrochemical industry, Glossary of Terms on Chemical Safety for Use in IPCS Publications, van Nieuwenhuyse, Brussels 2006. http://www.petrochemistry.eu/glossary.html, (Petrochem Ind - Brit) {473}