Registration Dossier
Registration Dossier
Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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.
Use of this information is subject to copyright laws and may require the permission of the owner of the information, as described in the ECHA Legal Notice.
EC number: 203-265-2 | CAS number: 105-05-5
Toxicity to microorganisms
Administrative data
Link to relevant study record(s)
Description of key information
The testing of, 1,4-diethylbenzene with OECD 209, taking into account the characteristics of the substance (poorly soluble and volatile), and where the Water Accommodated Fraction (WAF) has been used, leads to a result of EL50 of >250 mg (Effective Loading).
Key value for chemical safety assessment
- EC50 for microorganisms:
- 250 mg/L
Additional information
The inhibition ranged from 4.8% to -9.3%. Due to the characteristics of the substance (poorly soluble and volatile), the testing using the Water Accommodated Fraction (WAF) leads to a result of EL50 of >250 mg (Effective Loading). At lower concentrations on the range of solubility (10 mg/L and 25 mg/L) no toxic effects have been observed.
The value of Effective Loading will be used for the derivation of PNEC.
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.
