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EC number: 905-588-0
CAS number: -
The 10 hour IC50 (respiration inhibition) of o-xylene is 220 mg/kg soil.
A single study to investigate the effects of
o-xylene on soil microorganisms was identified. This study reported a 10
hour EC50 of 220 mg/kg nominal. Although this study does not follow the
standard guidelines for measuring respiration inhibition of soil
microorganisms it is well documented and scientifically acceptable. The
test design uses a closed system and analytical monitoring. The exposure
period is only 10 hours compared to the standard 28 days. Therefore,
although we consider this test reliable, this study will not be used to
derive the PNEC in the risk assessment.
The final decision letter from ECHA on the
xylene isomers requested that this endpoint is completed using novel
experimental data. Testing of the xylene isomers for this endpoint is
currently ongoing and the dossier will be updated to include the result
of this testing once it is complete.
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.
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