Registration Dossier
Registration Dossier
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EC number: 294-436-0 | CAS number: 91722-33-7 A complex combination of organic compounds separated after condensation of the vapors from the destructive distillation of wood.
Endpoint summary
Administrative data
Description of key information
Additional information
The test item Tar wood was tested using a concentration of nominally 20 mg organic carbon/L (corresponding to 33.4 mg Tar wood/L) in test medium following OECD 301B and EU-Method C.4-C. Aniline was chosen as positive control.
Activated sludge was used as inoculum (concentration in the test 25.0 mg dry matter/L). The test was left running for 28 days.
All validity criteria were met. Degradation of the positive control was 65 % after eleven days.
The following data were determined for the test item Tar wood:
10-day-window: day 4 – 14
degradation at the end of 10-day-window 37 %
degradation at the end of the test 47 %
pass level following guideline: 60% at the end of 10-day-window
Therefore, regardless of the 10-day-window, Tar wood is not biodegradable following OECD 301B/EU C.4-C.
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