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Environmental fate & pathways

Biodegradation in water and sediment: simulation tests

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Link to relevant study record(s)

Reference
Endpoint:
biodegradation in water: simulation testing on ultimate degradation in surface water
Type of information:
experimental study
Adequacy of study:
key study
Study period:
Experimental starting date (Preparation of the test system) 13 April 2021

Start of exposure (day 0) 19 April 2021
Experimental completion date expected by February 2022
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
OECD Guideline 309 (Aerobic Mineralisation in Surface Water - Simulation Biodegradation Test)
GLP compliance:
yes (incl. QA statement)
Specific details on test material used for the study:
radiolabeled test substance:
Name of test substance: 14C-Bis(4-tert-butylphenyl)amine
Test substance No.: 18/0435-1
Batch No: 1254-1101
Chemical purity: 97.3 %
Radiochemical Purity: 98.7 %
Identity: confirmed
Specific activity: 72.8 MBq/g
Specific activity of AI: 7.8 MBq/mg
Concentration of AI:
AI=active ingredient (test item) 9.21 mg/g
Homogeneity: Homogenous
Solvent: Acetonitrile
IUPAC name: Bis(4-t-butylphenylamin)

unlabeled test substance:
Name of unlabelled test substance: Bis(4-tert-butylphenyl)amine
Test substance No: 21/0138-1
Batch No: HDMPF
CAS No: 4627-22-9
Purity: 93.9 % (Certificate of Analysis)
Content: not indicated
Identity: confirmed (Certificate of Analysis)
Homogeneity: given

Radiolabelling:
yes
Oxygen conditions:
aerobic (low dissolved oxygen)
Inoculum or test system:
effluent/surface water mixture, non-adapted treated
Remarks:
study ongoing, details available in final report
Details on source and properties of surface water:
study ongoing, details available in final report
Details on inoculum:
study ongoing, details available in final report
Duration of test (contact time):
90 d
Details on study design:
study ongoing, details available in final report
Test performance:
study ongoing, details available in final report
Remarks on result:
other: study ongoing, details available in final report
Key result
Remarks on result:
other: study ongoing, details available in final report
Key result
Remarks on result:
other: study ongoing, details available in final report
Transformation products:
not specified
Remarks:
study ongoing, details available in final report
Details on transformation products:
study ongoing, details available in final report
Details on results:
study ongoing, details available in final report
Results with reference substance:
study ongoing, details available in final report

study ongoing, details available in final report

Validity criteria:
study ongoing, details available in final report
Observed value:
study ongoing, details available in final report
Validity criteria fulfilled:
yes
Remarks:
study ongoing, details available in final report
Conclusions:
study ongoing, details available in final report
Executive summary:

study ongoing, details available in final report

Description of key information

An OECD 309 study is still ongoing. The delay is caused by analytical difficulties.

Key value for chemical safety assessment

Additional information