Di(tetraethylammonium)hexahydroxoplatinate(IV)

Biodegradation in water: screening tests

Link to relevant study record(s)

Reference

Reference 1

Endpoint:

biodegradation in water: ready biodegradability

Type of information:

experimental study

Adequacy of study:

key study

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

OECD Guideline 301 B (Ready Biodegradability: CO2 Evolution Test)

Deviations:

no

Qualifier:

according to guideline

Guideline:

EPA OTS 796.3260 (Ready Biodegradability: Modified Sturm Test)

Deviations:

no

GLP compliance:

yes

Oxygen conditions:

aerobic

Inoculum or test system:

activated sludge, domestic (adaptation not specified)

Details on inoculum:

The concentration of suspended solids was determined to be 4.0 g/l in the concentrated sludge. Before use, the sludge was allowed to settle (35 minutes) and the supernatant liquid was used as inoculum at the amount of 10 ml/l of mineral medium.

Duration of test (contact time):

28 d

Initial conc.:

12 mg/L

Based on:

TOC

Initial conc.:

53.3 mg/L

Based on:

test mat.

Parameter followed for biodegradation estimation:

CO2 evolution

Reference substance:

acetic acid, sodium salt

Test performance:

all criteria for acceptability of the test were met

Parameter:

% degradation (CO2 evolution)

Value:

1

Sampling time:

2 d

Parameter:

% degradation (CO2 evolution)

Value:

1

Sampling time:

5 d

Parameter:

% degradation (CO2 evolution)

Value:

1

Sampling time:

7 d

Parameter:

% degradation (CO2 evolution)

Value:

1

Sampling time:

9 d

Parameter:

% degradation (CO2 evolution)

Value:

1

Sampling time:

12 d

Parameter:

% degradation (CO2 evolution)

Value:

3

Sampling time:

14 d

Parameter:

% degradation (CO2 evolution)

Value:

3

Sampling time:

19 d

Parameter:

% degradation (CO2 evolution)

Value:

3

Sampling time:

23 d

Parameter:

% degradation (CO2 evolution)

Value:

3

Sampling time:

27 d

Parameter:

% degradation (CO2 evolution)

Value:

4

Sampling time:

29 d

Validity criteria fulfilled:

yes

Interpretation of results:

not readily biodegradable

Conclusions:

Tetraethylammoniumhydroxide (TEAH) 35% in water was designated as not readily biodegradable.

Executive summary:

Desmares-Koopmans (2014) is a GLP-compliant study following OECD guideline 301B. It is reliable without restrictions and can be used as a key study for this endpoint. Tetraethylammoniumhydroxide (TEAH) 35% in water was designated as not readily biodegradable.

Reference 2

Endpoint:

biodegradation in water: ready biodegradability

Data waiving:

study technically not feasible

Justification for data waiving:

the study does not need to be conducted because the substance is inorganic

Description of key information

Biodegradation is not relevant for inorganic substances, but as this substance has an organic component the biodegradation potential of the organic part of the test item has been assessed. Tetraethylammoniumhydroxide (TEAH) 35% in water was designated as not readily biodegradable.

Key value for chemical safety assessment

Biodegradation in water:

under test conditions no biodegradation observed

Type of water:

freshwater

Additional information

Biodegradation is not relevant for inorganic substances, but as this substance has an organic component the biodegradation potential of the organic part of the test item has been assessed. Desmares-Koopmans (2014) is a GLP-compliant study following OECD guideline 301B. It is reliable without restrictions and can be used as a key study for this endpoint. Tetraethylammoniumhydroxide (TEAH) 35% in water was designated as not readily biodegradable.