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EC number: 254-052-6
CAS number: 38640-62-9
rate in dependence of time and loading rate, number of carapace moults,
and number of living animals trapped at the surface
[number per total
animals, %], (excerpt
from original report).
Immobilisation0 – 24 h start
Immobilisation0 – 24 h end
Immobilisation24 – 48 h start
Immobilisation24 – 48 h end
Moults 48 h
Living animals atthe surface 48 h
20 % at 1 mg/L, 75 % at 2.5 mg/L, 95 % at 5 mg/L and 100 % at 10 mg/L,
and 25 mg/L after 48 h.
No immobilization was noted after 24 h.
Results after 48 h
No effect was observed in the range of
Under closed test conditions, diisopropylnaphthalene produced significant acute intoxication of the daphnia at low loadings: The EL50 (as loading) was 1.7 mg/L. In early studies, only slight effects on mobility of daphnia were observed in short-term toxicity tests within the range of water solubility of the test substance (0.1 to 0.2 mg/L).
For assessment of the short-term
toxicity to aquatic invertebrates, two valid studies are available. In a
third study, a vehicle was used to solubilise test substance and the
exposure period was only 24 h. The recent study (Aniol et al 2012) was
conducted with water accommodated fractions (WAF) of different loadings
under closed conditions.
AniolS, Blum Th, Honnen W 2012 (Daphnia magna)
1.0, 2.5, 5.0, 10.0, and 25 mg/L
EL50: 1.7 mg/LNOELR 1 mg/L
no vehicle, 48 h, semi-static, closed conditions,testing of WAFs,20 test organisms
nominal: 0.05, 0.066, 0.1, and 0.16 mg/L;stock solution:nominal 0.5 mg/Lmeasured: 0.2 mg/L
EC0: 0.066 mg/LEC50: > 0.16 mg/L
no vehicle, 48 h, static, only 10 test organisms
Nominal: 0.4, 0.72, 1.3, 2.3, 4.2, 7.6, and 14 mg/L
EC0: 0.4 mg/LEC50: 2.3 mg/L
vehicle: Tween 80 (10 mg/mL) in DMSO,24 h, static,20 test organisms
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