Environment

Triclosan poses no risk to the aquatic environment

Triclosan can be found in personal care products. After use, the substance enters the sewage system and will be removed from the waste water through both biodegradation and adsorption processes. The resulting effluent stream entering the river contains only very low amounts of Triclosan which are then further degraded by either biological or photolytic processes. The safety in the aquatic environment has been demonstrated via corresponding environmental risk assessments carried out for various chemical legislation requirements.

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Chloroform levels undetectable in real-use conditions

Under exaggerated conditions, researchers were able to measure the amount of chloroform released from products with and without Triclosan. The results of the study show that the amounts of chloroform that may be generated from personal care products containing Triclosan have little significance and do not reflect real world use. This is substantiated by a recent study in which the use of a benchmark toothpaste was demonstrated not to result in the formation of detectable chloroform levels within expected brushing times when using normal chlorinated drinking water (Hao, Parker, Knapp, 2007).

 

No evidence on adverse endocrine effects in living organisms

Several studies have been carried out in order to investigate the potential endocrine related effects to both amphibians and fish. Up to date, there is no evidence of Triclosan having an adverse endocrine-disrupting effect at environmentally relevant concentrations (Fort et al., 2010a).

 

Triclosan-residues in sewage sludge applied to farmland

Sewage sludge is usually incinerated and thus no residues of Triclosan will enter the environment via this pathway. Nevertheless, sewage sludge is also applied to the agricultural land (including pasture and range land), reclamation sites, public contact sites (e.g. parks, turf farms, highway median strips, golf courses), lawns, and home gardens. During this pathway, Triclosan residues in the sludge might be transferred to the terrestrial compartment, however, potential risk to towards terrestrial organisms is expected to be low. This assumption was proved by corresponding environmental risk assessments carried out for various chemical legislation requirements.
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