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EC number: 905-562-9
CAS number: -
The lowest 96 hour LC50 is 2.6 mg/L for
p-xylene. The estimated LL50 values from TLM QSAR were 4.667 - 5.921
The lowest value was used for chemical
Data are available on the acute toxicity of
each of the xylene isomers and ethylbenzene to fish. The studies by
Galassi et al (1988), Springborn (1994) and DiMarzio et al (2004) follow
OECD 203, whilst Holcombe et al (1987) used a flow through system to
expose different species simultaneously. Galassi et al (1988),
Springborn (1994) and Holcombe et al (1987) used a standard test
species, whilst DiMarzio et al (2004) tested a nonstandard freshwater
fish. All studies included analytical confirmation of the exposure
The 96hr LC50 results reported from these
studies for the different isomers and ethylbenzene are very similar,
with a range of 2.6 -11.23 mg/L. The most conservative result from the individual
isomers and ethylbenzene will be used in the risk assessment.
A TLM-EqP modeling framework was used to
support values derived experimentally and are presented as supporting
The estimated LL50 values from TLM QSAR were
4.667 - 5.921 mg/L.
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