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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Ecotoxicological information

Toxicity to microorganisms

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Administrative data

Link to relevant study record(s)

Description of key information

Three studies following OECD 209 are available for o- and p- xylene, a non-guideline study is available for ethylbenzene. The 3-hour NOEC is 157 mg. L-1for p-xylene, the 24 hour IC50 is 96 mg. L-1 for ethylbenzene.

Key value for chemical safety assessment

Additional information

The studies by Oldersma et al (2004) and Volskay and Grady (1988) both follow OECD 209. Oldersma et al (2004) used p-xylene as the test substance, Volskay and Grady (1988) tested both o- and p-xylene. Each of the tests used a single test concentration approximating the limit of solubility of the test substance. The EC50 was not observed in any of the tests.

A non-guideline study by Blum (1991) used ethylbenzene as the test substance. This study reported a 24h-IC50 forNitrosomonasof 96 mg. L-1.