5-Chloro-2-(2,4-dichlorophenoxy)-phenol; formula: C12H7Cl3O2; CAS Registry Number: 3380-34-5
Structure of Triclosan
Source: GSBL Joint Substance Database

Chlorinated aromatic biocide

Triclosan is a biocide widely used in disinfectants, soaps and deodorants. It is found in cosmetics as preservatives and is used for antimicrobial treatment of textiles.
Because of its broad use there is some concern about the development of resistant and cross-resistant bacterial strains. Triclosan may be transformed into polychlorinated dibenzodioxins and dibenzofurans upon exposure to UV light. The environmental relevance of this process is not clear.

Triclosan is toxic to aquatic organisms, especially to algae.


Suspended particulate matter Fine insoluble mineral or organic particles in the water phase

Sampling area

Saarländischer Verdichtungsraum Important, old-industrialised conurbation in Germany.
Verdichtungsraum Halle-Leipzig Region in the chemical triangle of Central Germany

Sampling period

2006 - 2012

Extended information

Links to external information and legislation