Lexikon

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aromatics
compounds containing one or more benzene rings that also may contain sulfur, nitrogen and/or oxygen. Typical contaminants of soil and ground water generally originated from mineral oil. The monoaromatics such as benzene, toluene, xylene and ethyl benzene (BTEX) contain one benzene ring in a molecule. There are more aromatic rings in the molecular stucture of polyaromatic or polycyclic aromatic compounds (PAH).
chlorinated aromatics

a collective term for chlorinated derivatives of benzene, toluene, phenol, naphthalene and bi-phenyl and other compounds containing at least one benzene ring. Chlorinated aromatics are widely used as intermediates in the manufacture of medicines, agricultural chemicals and paints.

nitroaromatics, EUGRIS

nitroaromatics are carcinogenic and mutagenic aromatic substances, that are typical contaminants of contaminated military sites, e.g. 2,4,6-Trinitrotoluene (TNT), 2,4-Dinitrotoluene (DNT), 1,3,5-trinitro-1,3,5-triazine (also known as RDX), cyclotetramethylene tetranitramine (also known as HMX), some pesticides (atrazine), and a number of anilines. (Source: EUGRIS)