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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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: 249-171-5 | CAS number: 28706-25-4
Toxicity to microorganisms
Administrative data
Link to relevant study record(s)
Description of key information
The substance was found to be non-toxic to waste-water bacteria.
Key value for chemical safety assessment
- EC50 for microorganisms:
- 100 mg/L
Additional information
Two guideline studies according to OECD 209 are available for the assessment of the toxicity to microorganisms. In a study provided by Clariant (1989) an IC50 value > 100 mg/L was determined while in a study by Kemira (1989) an EC50 > 10000 mg/L was observed. These values are supported by two studies according to OECD 209 using "Analogue substance 1" as test substance. These results are considered to be adaptable for the test substance as well due to their structural similarities. In both studies the EC50 values were determined to exceed 2000 mg/L (Clariant 984/b-01, 2002 and 2791c-07, 2007). Based on these data, the inhibition of the degradation activity of activated sludge is not anticipated when introduced in appropriate low concentrations.
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.
