Registration Dossier

Diss Factsheets

Ecotoxicological information

Toxicity to microorganisms

Currently viewing:

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.