Registration Dossier

Data platform availability banner - registered substances factsheets

Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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.

Diss Factsheets

Environmental fate & pathways

Biodegradation in water: screening tests

Currently viewing:

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:

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.