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Ecotoxicological information

Short-term toxicity to fish

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Description of key information

The lowest 96 hour LC50 is 2.6 mg/L for p-xylene.

Key value for chemical safety assessment

LC50 for freshwater fish:
2.6 mg/L

Additional information

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 non-standard freshwater fish. All studies included analytical confirmation of the exposure concentrations. The result from Galassi et al (1988) is also the lowest result listed in the EU RAR (ECB 2007) and the Draft Screening Assessment Report (Environment Canada 2014) for acute toxicity of ethylbenzene to fish.

The 96 hour LC50 results reported from these studies are very similar, with a range of 2.6 -11.23 mg/L. The lowest result will be used in the risk assessment.