Registration Dossier
Registration Dossier
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EC number: 239-914-1 | CAS number: 15816-71-4
Endpoint summary
Administrative data
Description of key information
In aqueous systems Octanoic acid, compound with dicyclohexylamine (1:1) is hydrolytically very unstable so that in aqueous solution a rapid decomposition to the educts can be observed.The substance will rapidly dissociate to octanoic acid and dicyclohexylamine. The time of decomposition was estimated as < 8 minutes. Therefore Octanoic acid, compound with dicyclohexylamine (1:1) is not stable at “standard” testing conditions representative for human and environmental exposure. Hence, it is fully justified to apply the read-across methodology by use of the respective data from the breakdown/decomposition products to describe the ecotoxicological behaviour of the substance to be registered.
DCHA:
Fish: 96h LC50: 62 mg/L
Daphnia: 48h EC50: 8 mg/L
Algae: 72h EC50 > 1 mg/l, NOEC: 0.016 mg/l
Microorganism: 3h EC50: 712 mg/l
Octanoic acid:
Fish: 96h LC50: 22 mg/L
Daphnia: 48h EC50: 550 mg/L
Algae: 72h EC50: 1.67 mg/l, NOEC: 0.47 mg/l
Microorganism: 3h EC50: ≥837 mg/l
For the four trophic levels the lowest respective LC50/EC50/NOEC is calculated for the entire substance considering the molar mass of 325.5 g/mol for Octanoic acid, compound with dicyclohexylamine (1:1), 181.32 for DCHA and 144.21 for octanoic acid respectively.
Therefore the respective LC50's/EC50's/NOEC for Octanoic acid, compound with dicyclohexylamine (1:1) are:
Fish: 96h LC50: 49.66 mg/l
Daphnia: 48h EC50: 14.4 mg/l
Algae: 72h EC50: 1.8 mg/l, NOEC: 0.029 mg/l
Microorganism: 3h-EC50: 712 mg/l
Additional information
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