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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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: 700-954-4 | CAS number: 1338-23-4
Biodegradation in water: screening tests
Administrative data
Link to relevant study record(s)
Description of key information
Two determinations of the biodegradability of methyl-ethylketone peroxide were performed according to OECD 301B and 301D, respectively. Methyl-ethylketone peroxide is evaluated as ready biodegradable in the CO2 Evolution Test and in the closed bottle test.
Key value for chemical safety assessment
- Biodegradation in water:
- readily biodegradable
- Type of water:
- freshwater
Additional information
Methyl-ethylketone peroxide was assessed in two studies according to OECD 301B and 301D with considered as key studies as those cover the relevant stabilizing agents (TIXB, DMP and diacetone alcohol).
Methyl-ethylketone peroxide in TXIB/diacetone alcohol was tested using a concentration of nominally 10 mg organic carbon/L (corresponding to 26.6 mg methyl-ethylketone peroxide/L) in testmedium following OECD guideline 301B and EU-Method C.4-C. Aniline was chosen as positive control.
Activated sludge from a standard sewage treatment plant was used as inoculum (concentration in the test 25 mg dry matter/L). The test was left running for 28 days. All validity criteria were met. Degradation of the positive control was 70 % after seven days.
The following data were determined for the test item Methylethylketoneperoxide:
degradation at the end
of 10-day-window: 57 %
degradation at the end of the test: 90 %
In conclusion, methyl-ethylketone is readily biodegradable.
In the second study (methyl-ethylketone peroxide in DMP), the biodegration of methyl-ethylketone peroxide was determined in a closed bottle test according to the OECD guideline 301D. In the closed bottle test, methyl-ethylketone peroxide is added to an aqueous solution of mineral salts and exposed to relatively low numbers of microorganisms under aerobic conditions for a period of 28 days. The concentration of methyl-ethylketone peroxide in the test bottle was 2 mg/L.
Methyl-ethylketone peroxide was ready biodegradable with a degradation of 87 % at 28 day in this closed bottle test.
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.
