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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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: 275-031-8 | CAS number: 70942-01-7
Biodegradation in water: screening tests
Administrative data
Link to relevant study record(s)
Description of key information
No biodegradation expected.
Key value for chemical safety assessment
- Biodegradation in water:
- under test conditions no biodegradation observed
Additional information
The substance CAS 70942-01-7 was not tested for ready biodegradability, but four tests were performed to measure BOD5 and BOD/COD ratio. According to the Guidance on information requirements and Chemical Safety Assessment, Chapter R.7b: Endpoint specific guidance (Version 1.1, May 2008), information on the 5-day biochemical oxygen demand (BOD5) can be used for classification purposes only when no other measured degradability data are available; furthermore an estimation was performed on the substance with BIOWIN 4.10. The QSAR based screening criterion for identifying substances for persistency (P and vP) confirmed that the substance is expected to be persistent and this estimated behaviour is supported by the results obtained from the BOD5:COD ratio studies available.
Furthermore, a Zahn-Wellens/EMPA study (Novartis Services AG., 1997) was initiated on CAS 4193-55-9, the analogous substance with identical organic part and salification with sodium instead than sodium/potassium; the test was stopped because after 3 hours the substance demonstrated an adsorption of 66 %, and an 83.6 % after 24 hours.
One ready biodegradability and two inherent studies were performed on CAS 16470-24-9, the analogous substance, dihydroxyethyl derivative, tetrasulphonated. This analogous can be considered as a conservative representative, since the higher water solubility (650 mg/l vs 13.45 mg/l of CAS 70942-01-7) will lead to a better availability in the water compartment.
In the ready biodegradability study (Ciba Geigy 1992) a degradation of 1.2 % in 28 days was recorded, while the inherent studies (Ciba Geigy 1992 and 1997) indicated very low or no degradation at all.
As a conclusion the substance to under registration, CAS 70942-01-7, is expected to be neither readily nor inherently biodegradable.
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.
