[(3,7-dimethyl-6-octenyl)oxy]acetaldehyde

Biodegradation in water: screening tests

Administrative data

Endpoint:

biodegradation in water: ready biodegradability

Type of information:

experimental study

Adequacy of study:

key study

Study period:

From July 16, 2019 to October 08, 2019

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2019

Report date:

2019

Materials and methods

Test guideline

Test guideline 1

Qualifier:

according to guideline

Guideline:

OECD Guideline 301 F (Ready Biodegradability: Manometric Respirometry Test)

Deviations:

no

Test guideline 2

Qualifier:

according to guideline

Guideline:

EU Method C.4-D (Determination of the "Ready" Biodegradability - Manometric Respirometry Test)

Deviations:

no

Test guideline 3

Qualifier:

according to guideline

Guideline:

EPA OPPTS 835.3110 (Ready Biodegradability)

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Test material

Test material information

Constituent 1

Reference substance name:

[(3,7-dimethyl-6-octenyl)oxy]acetaldehyde

EC Number:

231-324-2

EC Name:

[(3,7-dimethyl-6-octenyl)oxy]acetaldehyde

Cas Number:

7492-67-3

Molecular formula:

C12H22O2

IUPAC Name:

2-[(3,7-dimethyloct-6-en-1-yl)oxy]acetaldehyde

Test material form:

liquid

Specific details on test material used for the study:

Batch: VE00601569
Appearance: Colorless to pale yellow liquid
Expiration Date: January 12, 2020
Purity: 92.9% (sum of the two peaks)

Study design

Oxygen conditions:

aerobic

Inoculum or test system:

activated sludge, domestic (adaptation not specified)

Details on inoculum:

Fresh activated sludge from a biological waste water treatment plant treating predominantly domestic sewage (Bois-de-Bay, Satigny, Switzerland) was used.

Duration of test (contact time):

60 d

Initial test substance concentration

Initial conc.:

30 mg/L

Based on:

test mat.

Reference substance

Reference substance:

other: Sodium benzoate

Results and discussion

% Degradation

% Degradation 1

Key result

Parameter:

% degradation (O2 consumption)

Value:

79

Sampling time:

28 d

% Degradation 2

Key result

Parameter:

% degradation (O2 consumption)

Value:

85

Sampling time:

60 d

BOD5 / COD results

Results with reference substance:

Degradation of sodium benzoate exceeded 40% after 7 days and 65% after 14 days: the activity of the inoculum was thus verified (validity criterion).

Applicant's summary and conclusion

Validity criteria fulfilled:

yes

Interpretation of results:

readily biodegradable

Conclusions:

The Ready Biodegradability of Citronellyl Oxyacetaldehyde was determined by the Manometric Respirometry Test.

Citronellyl Oxyacetaldehyde undergoes 79% biodegradation after 28 days in the test conditions. The 10-day window criterion is also fulfilled (19% biodegradation on day 4 and 72% on day 14).

Citronellyl Oxyacetaldehyde did not inhibit the intrinsic respiration of the inoculum at the test concentration and was therefore considered to be non-toxic to the inoculum at the test concentration.

Executive summary:

The Ready Biodegradability of Citronellyl Oxyacetaldehyde was determined by the Manometric Respirometry Test.

 

Citronellyl Oxyacetaldehyde undergoes 79% biodegradation after 28 days in the test conditions.The 10-day window criterion is also fulfilled (19% biodegradation on day 4 and 72% on day 14).

Citronellyl Oxyacetaldehyde did not inhibit the intrinsic respiration of the inoculum at the test concentration and was therefore considered to be non-toxic to the inoculum at the test concentration.

Thus, Citronellyl Oxyacetaldehyde should be regarded as readily biodegradable according to this test.