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Ecotoxicological information

Long-term toxicity to aquatic invertebrates

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Description of key information

The toxicity of heptanal was tested on Daphnia magna reproduction according to the OECD 211 guideline. The EC10 for neonate production was 0.31 mg/L.

Key value for chemical safety assessment

Fresh water invertebrates

Fresh water invertebrates
Effect concentration:
0.31 mg/L

Additional information

This study was designed to determine the effects of heptanal on Daphnia magna reproduction and survival in a 21 days test according to the OECD 211 Guideline. The total test period was 21 days; all test solutions (including control) were renewed every day (including "week-end" periods). Ten replicate test vessels were prepared for the control and the test concentration. A single juvenile Daphnia magna (<24 hours old selected by filtration) was added to each test vessel. At each renewal occasion, parental animals were transferred into freshly prepared test media. All neonates produced were counted daily and the number of juveniles living neonates per parental animal on any day during the 21 -day study duration was statistically analysed. EC10 or NOEC values on day 21 based on geometric means of concentrations are the following:

EC10 for mean number of neonate produced per parent alive at the end of the test: 0.31 mg/L

NOEC for mobility > 0.819 mg/L (highest tested concentration)

NOEC for age at first brood: > 0.819 mg/L (highest tested concentration).

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