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EC number: 203-933-3
CAS number: 112-07-2
Daphnia magna. 48hr EC50 =67.5mg/l (protocol: ISO6341)Rotifer (Brachionus sp.) 48hr EC50 (reproduction) = 303mg/l (protocol: AFNOR)Oyster (Crassostrea sp.) 24hr NOEC (developmental toxicity) >100mg/l. EC100<1000mg/lDaphnia magna. 48hr EC50 = 37mg/l (DIN protocol)Daphnia magna 48hr EC50/LC50 = 143mg/l, 180mg/lMysid. 48hr EC50 =70,609mg/l (protocol: QSAR)
A number of studies have been carried out using multiple species, both
fresh and salt water. These indicate that 2 -butoxyethyl acetate is
somewhat toxic to invertebrates. A number of studies are available in
the preferred species daphnia magna. One of these was not performed for
the normally required 48hrs (only 24hr studies), however 3 studies were
for the requisite period. Of these studies, two of the study reports are
available (Devillers and BASF) and the lower of these is used as the
value for the key parameter for fresh water. In a 48 hour acute toxicity
study, rotifers showed a reduction in reproduction rate from
concentrations of ~7mg/l upwards but an EC50 of 303mg/l. However, the
results showed a very shallow dose response curve and wide confidence
intervals and should to be used with caution. In the study in oyster
larvae, there was no evidence of developmental effects after 24hrs
exposure to concentrations up to 100mg/l
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