Registration Dossier

Environmental fate & pathways

Biodegradation in water: screening tests

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Link to relevant study record(s)

Reference
Endpoint:
biodegradation in water: ready biodegradability
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2018
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Reference:
Composition 0
Qualifier:
according to
Guideline:
OECD Guideline 301 D (Ready Biodegradability: Closed Bottle Test)
Version / remarks:
1992
GLP compliance:
yes (incl. certificate)
Test material information:
Composition 1
Oxygen conditions:
aerobic
Inoculum or test system:
activated sludge, domestic, non-adapted
Details on inoculum:
- Source of activated sludge: three sewage treatment plants
- Preparation of inoculum for exposure:
- Pretreatment: filtered through glass wool (discarding first 200 mL). It will be mixed and aerated for 5 days. The filtrate will be diluted by using deionized water
- Preperation: The inoculum will be prepared by adding the required amount of activated sludge (Maximum COD 6000 mg/L as per ISO 5815-1:2003(E)) and dilution water (based on the COD) in a cleaned glass beaker. The inoculum will be stored at about 20 ± 2°C
- Initial cell/biomass concentration:
Duration of test (contact time):
28 d
Remarks on result:
other: result will be given as soon as possible
Validity criteria fulfilled:
yes
Interpretation of results:
other: result will be given as soon as possible
Conclusions:
Biodegradation of the test item will be assessed and the result will be given as soon as possible.
Executive summary:

A biodegradation test is currently conducted according to OECD TG 301D to determine the biodegradation of the test item. The result will be given later. The study was initiated before 31 March 2018 but was not completed by the CRO in due time to complete the registration dossier. The study record will be updated as soon as the results will become available.

Description of key information

Biodegradation of the test item will be assessed and the result will be given as soon as possible.

Key value for chemical safety assessment

Additional information

A biodegradation test is currently conducted according to OECD TG 301D to determine the biodegradation of the test item. The result will be given later. The study was initiated before 31 March 2018 but was not completed by the CRO in due time to complete the registration dossier. The study record will be updated as soon as the results will become available.