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EC number: 447-010-5 | CAS number: 670241-72-2 ISONONYLBENZOAT
Toxicity to terrestrial plants
Administrative data
Link to relevant study record(s)
Description of key information
Effect concentrations after exposure of three plant species to isononyl benzoate in an OECD 208 study: Phytotoxic effects for the endpoint seedling emergence were observed only for the plant species rape at concentrations ≥ 320mg/kg, for plant species soybean no effects were observed up to and including the highest test concentration of 1000 mg/kg soil dw.
EC50 (21d) seedlings emergence > 1000 mg/kg for all tested plant species
NOEC (21d) seedlings emergence = 1000 mg/kg for oats and soybean
NOEC (21d) seedlings emergence >= 320 mg/kg for rape
Lowest effect concentrations recorded for phytotoxic effects regarding biomass were:
EC50 (21d) shoot fresh weight = 139 mg/kg for oats
NOECD (21d) shoot fresh weight = 32 mg/kg for oats
Key value for chemical safety assessment
- Short-term EC50 or LC50 for terrestrial plants:
- 139 mg/kg soil dw
- Long-term EC10, LC10 or NOEC for terrestrial plants:
- 32 mg/kg soil dw
Additional information
The phytotoxicity of the test item Isononyl benzoate to three terrestrial plant species was determined in a seedling emergence test over a period of 21 days, according to OECD Draft 208 (September 2003) with the nominal concentrations of 10 - 32 - 100 - 320 - 1000 mg/kg soil dry weight (dw). Test systems were one monocotyledon, oats (Gramineae), and two dicotyledons, soybean (Leguminosae) and rape (Brassicaceae). The test item was incorporated into the soil in which the seeds were sown. The test container were bottom watered with nutrient solution as needed. The toxic effects of the test item were determined on day 7, 14 and 21 by visual observations (number of emerged seedlings and phytotoxic effects) and on day 21 by shoot fresh weight and shoot height determination. The inhibition of shoot height, shoot fresh weight and rate of emergence was calculated in relation to the solvent control. Phytotoxic effects for the endpoint seedling emergence were observed only for the plant species rape at concentrations ≥ 320mg/kg, for plant species soybean no effects were observed up to and including the highest test concentration of 1000 mg/kg soil dw.
EC50 (21d) seedlings emergence > 1000 mg/kg for all tested plant species
NOEC (21d) seedlings emergence = 1000 mg/kg for oats and soybean
NOEC (21d) seedlings emergence >= 320 mg/kg for rape
Lowest effect concentrations recorded for phytotoxic effects regarding biomass were:
EC50 (21d) shoot fresh weight = 139 mg/kg for oats
NOECD (21d) shoot fresh weight = 32 mg/kg for oats
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