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EC number: 202-826-9
CAS number: 100-18-5
Two acute studies have been conducted on diisopropylbenzene.
A 48 hour acute study with Daphnia magna was conducted with the
mixed isomers (meta and para) of diisopropylbenze (DIPB) under
semi-static conditions. The test solutions were prepared using a solvent
carrier with nominal concentrations ranging from 0.2 to 2.0 mg/l which
all exceeded the water solubility of the substance. The test resulted in
a EC50 of 0.392 mg/L and a LC0 of 0.246 mg/L based upon mean measured
concentrations. Another 48 hour Daphnia magna acute study was
conducted with m-DIPB as part of a 7 species study. The study was
conducted as a limit test using a recirculating column elution apparatus
providing a constant saturated solution. No immobility to Daphnia
magna (NOEC) was observed in this test at at the mean measured
concentration of 0.93 mg/L. Five other invertebrate species were also
included in the 7 species studies and exposed for 96 hours. The LC50s
for those 5 other invertbrate species were > 0.91 mg/L, the mean
measured concentration of the saturated solution over 96 -hours. The
results of these studies suggest no acute effects to invertebrate
organisms at the limit of water solubility.
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