3-C12-18-(even numbered)-alkylamido-N,N-dimethylpropan-1-amino oxide

Biodegradation in water and sediment: simulation tests

Link to relevant study record(s)

Reference

Reference 1

Endpoint:

biodegradation in water: sewage treatment simulation testing

Type of information:

experimental study

Adequacy of study:

supporting study

Study period:

March - April 1980

Reliability:

4 (not assignable)

Rationale for reliability incl. deficiencies:

other: document insufficient

Qualifier:

equivalent or similar to guideline

Guideline:

OECD Guideline 303 A (Simulation Test - Aerobic Sewage Treatment. A: Activated Sludge Units)

Principles of method if other than guideline:

The biodegradability of Aminoxid WS 35 was investigated in the OECD-Confirmatory-Test and the OECD Coupled Units Test.

GLP compliance:

no

Specific details on test material used for the study:

- Identifiers: EC 268-938-5, CAS 68155-09-9

Oxygen conditions:

aerobic

Inoculum or test system:

activated sludge (adaptation not specified)

Duration of test (contact time):

25 - 42 d

% Degr.:

98

Parameter:

other: influent/effluent concentrations

Remarks on result:

other: OECD-Confirmatory-Test

% Degr.:

77

Parameter:

DOC removal

Remarks on result:

other: Coupled Units-Test

In the OECD-Confirmatory-Test a biodegradation of 98% was determined (via the influent into the laboratory activated sludge unit, concentrations ranging from 13 mg/L to 15.3 mg/L were introduced into the system) over a test period of 25 days. In the Coupled Units-Test (principle: combining two confirmatory test units) a biodegradation of 77% was determined over a test period of 42 days based on DOC measurements.

Conclusions:

In the OECD-Confirmatory-Test a biodegradation of 98% was determined (via the influent into the laboratory activated sludge unit concentrations ranging from 13 mg/L to 15.3 mg/L were introduced into the system) over a test period of 25 days. In the Coupled Units-Test (principle: combining two confirmatory test units) a biodegradation of 77% was determined over a test period of 42 days based on DOC measurements.

Reference 2

Endpoint:

biodegradation in water: simulation testing on ultimate degradation in surface water

Data waiving:

study scientifically not necessary / other information available

Justification for data waiving:

the study does not need to be conducted because the substance is readily biodegradable

Reference 3

Endpoint:

biodegradation in water: sediment simulation testing

Data waiving:

study scientifically not necessary / other information available

Justification for data waiving:

the study does not need to be conducted because the substance is readily biodegradable

Description of key information

Only supporting information was identified on this endpoint.

 

Following REACH Annex IX 9.2.1.2 and 9.2.1.4 column 2, simulation testing on ultimate degradation in surface water and sediment simulation testing does not need to be conducted as the substance is readily biodegradable. No additional testing is therefore provided for endpoint coverage.

Additional information

One non-GLP study is available (Stache, 1980), investigating the biodegradability of the substance in a sewage treatment plant. In the OECD-Confirmatory-Test a biodegradation of 98% was determined (via the influent into the laboratory activated sludge unit, concentrations ranging from 13 mg/L to 15.3 mg/L were introduced into the system) over a test period of 25 days. In the Coupled Units-Test (principle: combining two confirmatory test units) a biodegradation of 77% was determined over a test period of 42 days based on DOC measurements. The study is assigned a Klimisch score of 4 and is considered as supporting information for endpoint coverage.