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EC number: 479-940-2 | CAS number: 613246-75-6
Biodegradation in water: screening tests
Administrative data
Link to relevant study record(s)
Description of key information
Sika Härter LJ can be considered as "not readily biodegradable". The degree of biodegradation reached 30% after 28 days. The 10 d-window began on day 5 and 25 % were reached at its end, staying below the pass level of 60 % given in the OECD guideline. However, Sika Härter LJ is considered to be inherently biodegradable.
Key value for chemical safety assessment
- Biodegradation in water:
- inherently biodegradable, not fulfilling specific criteria
- Type of water:
- freshwater
Additional information
Sika Härter LJ was tested for ready biodegradability in the Manometric Respirometry Test according to OECD guideline 301F and EU method C.4-D. The test item was tested using a nominal concentration of 73 mg test item/L (equivalent to a theoretical oxygen demand of 200 mg O2/L). Activated sludge was used as inoculum. The test was left running for 28 days. All validity criteria were met. The reference item reached the pass level of 60% on day 5. (criterion: < 14). The following data could be determined for the test item Sika Härter LJ:
10-day-window: day 5-15
degradation at the end of 10-day-window: 25 %
degradation at the end of the test: 30 %
pass level: 60% at the end of 10-d-window
Sika Härter LJ is regarded to be not readily biodegradable according to OECD 301F/EU C.4-D. However, Sika Härter LJ is considered to be inherently biodegradable.
Other information: data on biodegradability of the hydrolysis product 2,2-Dimethyl-3-lauroyloxy-propanal (CAS No. 102985-93-3)
2,2-Dimethyl-3-lauroyloxy-propanal was tested for ready biodegradability using a test item concentration corresponding to 20 mg organic carbon/L (nominal) in test medium following OECD 301B and EU-Guideline C.4-C. Aniline was chosen as reference item. Activated sludge was used as inoculum (concentration in the test 25 mg drymatter/L). The test was left running for 28 days. All validity criteria were met. Degradation of the reference item was 75 % after seven days. The degradation of test item at end of the test was 91 %. Therefore the 2,2-Dimethyl-3-lauroyloxy-propanal was considered to be readily biodegradable.
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