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Ecotoxicological information

Toxicity to terrestrial plants

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Description of key information

The effects of Benzyl Salicylate on the seedling emergence and early growth of higher terrestrial plants has been determined. The lowest EC10 was 70.5 mg/kg soil dry weight.

Key value for chemical safety assessment

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

Additional information

The seedling emergence and seedling growth test (OECD 208) covers a sensitive stage in the life-cycle of a plant and therefore data obtained from this study can be used as estimates of long-term toxicity (ECHA Chapter R.7c, section R.7.11.3.1). For long-term toxicity testing, ECHA considers six species as the minimum with two monocotyledonous species and four dicotyledonous species.

The effect of Benzyl Salicylate was tested with six test species representing six plant families. Test species comprised two monocotyledonous, Avena sativa (oats) and Allium cepa (onion), and four dicotyledonous species, Brassica napus (oilseed rape), Cucumis sativus (cucumber), Pisum sativum (peas) and Solanum lycopersicum (formerly specified as Lycopersicon esculentum, tomato).

No effect on seedling emergence and survival was observed at ≤667 mg/kg in S. lycopersicum and at ≤796 mg/kg soil in B. napus, C. sativus, A. cepa, A. sativa and P. sativum.

Shoot length was significantly reduced at test item concentrations of ≥148 mg/kg soil in S.lycopersicum while no effects were observed up to and including 796 mg/kg soil in B. napus, C. sativus, A. cepa, A. sativa and P. sativum.

Shoot fresh weight was significantly reduced at ≥148 mg/kg soil in S. lycopersicum and at ≥444 mg/kg soil in B. napus.

The lowest LOEC (148 mg/kg soil dry weight) and NOEC (49.4 mg/kg soil dry weight) were observed for shoot length and shoot fresh weight in S. lycopersicum. The lowest EC10 (70.5 mg/kg soil dry weight) and EC50 (272 mg/kg soil dry weight) were obtained for shoot fresh weight in S. lycopersicum.

The preferred observational endpoint in long-term studies is the EC10 value because it is derived from the dose response curve. In contrast the NOEC depends on the experiment design (e.g. the concentrations used in the test). Therefore the lowest EC10 of 70.5 mg/kg soil dry weight has been chosen as the key value for chemical safety assessment.