Triclosan

Monitoring data

Administrative data

Endpoint:

monitoring data

Type of information:

other: literature review

Adequacy of study:

key study

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

other: Data from multiple sources: Guideline studies (GLP/non-GLP), publications in (peer-reviewed) journals

Data source

Reference

Reference 1

Reference Type:

secondary source

Title:

Unnamed

Year:

2016

Report date:

2016

Reference 2

Reference Type:

secondary source

Title:

Unnamed

Year:

2012

Report date:

2012

Reference 3

Reference Type:

other: Primary sources

Title:

No information

Author:

Primary sources are listed under "Any other information on material and methods incl. tables"

Materials and methods

Principles of method if other than guideline:

A literature search was performed to collect recent information on environmental fate of Triclosan (TCS) and Methyltriclosan (MTCS). The references are listed under "Any other information on materials and methods incl. tables"

Test material

Test material information

Constituent 1

Reference substance name:

Triclosan

EC Number:

222-182-2

EC Name:

Triclosan

Cas Number:

3380-34-5

Molecular formula:

C12H7Cl3O2

IUPAC Name:

5-chloro-2-(2,4-dichlorophenoxy)phenol

Results and discussion

Any other information on results incl. tables

Environmental monitoring

Environmental concentrations of TCS were analysed in surface waters (fresh and marine waters) of several European countries. The maximum concentrations declined from the period between 1998-2009 to 2010-2012 from 0.285 µg/L to 0.138 µg/L in freshwater and from 0.142 to 0.029 µg/L in marine water.

Environmental concentrations of MTCS were analysed in different media: river and lake waters, wastewater treatment plant (WWTP) effluents, sewage sludges and soils. The maximum concentration detected in river water was 2300 ng/L in a monitoring study over 30 US states including 139 streams (Kolpin et al., 2002). Other data suggest generally lower values with a range of < 2–80 ng/L with higher values downstream of WWTPs (Cheng et al., 2011; Coogan et al., 2007; Waiser et al., 2011). Lake waters contained between 0.1–0.8 ng/L (Andresen et al., 2007; Lindström et al., 2002; Singer et al., 2002). Effluents from WWTPs reached MTCS values of up to 65 ng/L with a range of < 2–65 ng/L (Bester, 2005; Ciba, 1997; Lindström et al., 2002). In sewage sludges a maximum content of 1.03 µg/g dw was detected, although most values were well below this value (0.05­–0.45 µg/g dw; McAvoy et al., 2002). The TCS content in these sludges was between 0.53 and 14.7 µg/g dw.

In a field TCS biodegradation soil study by Lozano et al. (2012), control soil contained <= 0.48 ng/g dw MTCS compared to a TCS concentration of 2.7±0.7 ng/g dw. Spanish soil samples contained between 0.3 and 3.8 ng/g dw (Sánchez-Brunete et al., 2010). These values are very low compared to sewage sludge data which showed an MTCS content of 4–311 ng/g dw (Sánchez-Brunete et al., 2010).

Applicant's summary and conclusion

Conclusions:

Triclosan and its metabolite methyltriclosan have been detected in the environment during several monitoring studies. Data are mainly available from Europe and the USA.

Executive summary:

Triclosan and its metabolite methyltriclosan have been detected in the environment during several monitoring studies. Data are mainly available from Europe and the USA. The following media have been analysed: river and lake waters, wastewater treatment plant (WWTP) effluents, sewage sludges and soils.