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Ecotoxicological information

Toxicity to terrestrial plants

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Administrative data

Link to relevant study record(s)

Description of key information

most sensitive species: Lactuca sativa: 14-d NOEC = 74 mg/kg soil dw (OECD 208; Ciba Inc., 2010)

Key value for chemical safety assessment

Long-term EC10, LC10 or NOEC for terrestrial plants:
74 mg/kg soil dw

Additional information

The toxicity of Triclosan to seedlings of ten plant species was investigated in a study following OECD guideline 208. The seedlings were planted in soil mixed with a quatz sand/substance mixture.Seedling growth, biomass, morphology and mortality were recorded. The most sensitive NOEC was determined in lettuce. Based on plant dry weight the NOEC was 74 mg/kg (Ciba Inc., 2010).

The influence of Triclosan on seedling emergence of Cucumis sativus and the phytotoxicity of the substance to the seedlings were tested according to guideline FDA TAD-4.07. Plant seeds were grown in natural soil (sandy-loam) and the number of seeds as well shoot length and dry weight were recorded. The test was run for 28 days. Based on seedling emergence a NOEC > 1 mg/kg soil was determined (Ciba-Geigy Corporation 1997). The study by Ciba Inc., (2010) was selected as key study due to testing of more species and resulting in well-defined effect values.