Isopentyl phenethyl ether

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:

27 May to 30 June 1999

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

1999

Report date:

1999

Materials and methods

Test guideline

Qualifier:

according to guideline

Guideline:

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

Deviations:

no

GLP compliance:

yes

Test material

Test material information

Constituent 1

Reference substance name:

Isopentyl phenethyl ether

EC Number:

259-943-3

EC Name:

Isopentyl phenethyl ether

Cas Number:

56011-02-0

Molecular formula:

C13H20O

IUPAC Name:

isopentyl phenethyl ether

Specific details on test material used for the study:

Test material name (as stated in the report): ANTHER
Appearance: Colourless to pale yellow liquid
Lot No.: 278549

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 (City of Geneva) was used. The sludge is collected in the morning, washed three time in the mineral medium and kept aerobic until being used on the same day.

Duration of test (contact time):

34 d

Initial test substance concentration

Initial conc.:

100 mg/L

Based on:

test mat.

Reference substance

Reference substance:

other: Sodium Benzoate

Results and discussion

% Degradation

Key result

Parameter:

% degradation (O2 consumption)

Value:

76

Sampling time:

28 d

Details on results:

Anther undergoes 79% biodegradation after 34 days (76% after 28 days) in the test conditions. Biodegradation starts on day 7 and reaches 64% at the end of the 10 day window (day 7 to day 17).
At the concentration used in the test (100 mg/l), Anther is not inhibitory to the micro-organisms.

Applicant's summary and conclusion

Validity criteria fulfilled:

yes

Interpretation of results:

readily biodegradable

Conclusions:

Anther should be regarded as readily biodegradable according to this test.

Executive summary:

The Ready biodegradation of Anther was determined by the Manometric Respiratory test according to the OECD guideline for testing of chemicals, Method No. 301F.

Anther undergoes 79% biodegradation after 34 days (76% after 28 days) in the test conditions. Biodegradation starts on day 7 and reaches 64% at the end of the 10 day window (day 7 to day 17).

Anther should be regarded as readily biodegradable according to this test.

At the concentration used in the test (100 mg/l), Anther is not inhibitory to the micro-organisms.