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Ecotoxicological information

Toxicity to terrestrial plants

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Pinyl Isobutyraldehyde was tested for its plant toxicity according to OECD TG 208 under GLP using six plant species. The sandy loam soil was sterilised before use. All particles were <=0.2 cm. The organic matter content is 0.67 +/-0.1 %. The concentrations in the stock solutions were verified. Effect parameters measured were seedling emergence, growth and phytotoxic effects (chlorosis, necrosis and abnormal growth). The doses were selected based on a dose range finding study and in the main study the test concentrations were 12.3, 37, 111, 333 and 1000 mg/kg soil dw. The following dicotyls were used: Brassica napus, Glycine max, Solanum lycopersicum and Cucumis sativus. The following monocotyles were use: Avena sativa and Allium cepa. Untreated seeds were sewn in pots and plants were grown for 14 days, except Allium cepa which was grown for 21 days. Fresh weight of the leaves of plants was the more sensitive endpoint compared to germination, phytotoxicity and mortality. The EC10 of all six plant species was averaged as the number of species =>5. The overall EC10 on leaf fresh weight resulted in 21.3 mg/kg soil dw.

Key value for chemical safety assessment

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

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