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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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: 440-780-3 | CAS number: -
Biodegradation in water: screening tests
Administrative data
Link to relevant study record(s)
Description of key information
As reported into the ECHA guidance R.7b: Endpoint specific guidance page 208: Ready biodegradability: "
The following pass levels of biodegradation, obtained within 28 days, may be regarded as evidence of ready biodegradability: 70% DOC removal (TG 301 A and TG 301 E); 60% theoretical carbon dioxide (ThCO2; TG 301 B); 60% theoretical oxygen demand (ThOD; TG 301 C, TG 301 D and TG 301 F)."
The substance shows a biodegradation after 28 days of test period is equal to 7.6 %; therefore there is no evidence of ready biodegradation.
Key value for chemical safety assessment
- Biodegradation in water:
- not biodegradable
- Type of water:
- freshwater
Additional information
The substance was tested for its ready biodegradability in the carbon dioxide (CO2) evolution test (modified Sturm test) at approximately 76 mg per 2 litres, corresponding to 12 mg TC/I.
The study procedure was based on EEC directive 92/69, C.4-C, December 1992, and OECD guideline No. 301 B July 17, 1992.
The Theoretical CO2 production (ThCO2) of test item was calculated to be 1.72 mg CO2/mg. According to information provided by the sponsor the active ingredient concentration of the substance was 67.15%, the salt content was 25% and the water content was 4.5%.
Since the test item was known to be easily soluble in water, the test media were prepared using a stock solution of 1 g/I in milli-O water. A weighed amount of 500.6 mg of substance was added to a volumetric flask and dissolved in 500 ml milli-O water. The stock was a dark blue coloured solution. Aliquots of 76 ml of the stock solution were added to test substance
bottles A and B and the toxicity control bottle. The test solutions were continuously stirred during the test.
The relative degradation values calculated from the measurements performed during the test period revealed no significant degradation of substance. In the toxicity control was found to be not inhibitory.
Since all acceptability criteria prescribed by the protocol were met, this study was considered to be valid.
In conclusion, the test item was not readily biodegradable under the conditions of the modified Sturm test presently performed.
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.
