Alkenes, C6-10, hydroformylation products, high-boiling

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:

1997

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

other: see 'Remark'

Remarks:

The reliability rating is a 1 because the study followed an OECD standard guideline, which describes a procedure designed to evaluate this endpoint, and the results were reviewed for reliability and assessed as valid. The study was also conducted under GLP.

Data source

Reference

Reference Type:

other company data

Title:

Unnamed

Year:

1997

Materials and methods

Test guideline

Qualifier:

according to guideline

Guideline:

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

GLP compliance:

yes

Test material

Test material information

Constituent 1

Reference substance name:

Alkenes, C6-10, hydroformylation products, high-boiling

EC Number:

271-230-9

EC Name:

Alkenes, C6-10, hydroformylation products, high-boiling

Cas Number:

68526-82-9

Molecular formula:

None available

IUPAC Name:

None available - not a single isomer - see remarks

Constituent 2

Reference substance name:

Mixed HOF

IUPAC Name:

Mixed HOF

Study design

Oxygen conditions:

aerobic

Inoculum or test system:

activated sludge, domestic, non-adapted

Details on inoculum:

Inoculum used as the source of the microorganisms was an aliquot of fresh activated sludge from a domestic wastewater treatment facility in New Jersey, USA.

Duration of test (contact time):

28 d

Initial test substance concentration

Initial conc.:

ca. 44 mg/L

Based on:

test mat.

Parameter followed for biodegradation estimation

Parameter followed for biodegradation estimation:

O2 consumption

Reference substance

Reference substance:

benzoic acid, sodium salt

Results and discussion

% Degradation

Parameter:

% degradation (O2 consumption)

Value:

49.99

Sampling time:

28 d

Remarks on result:

other: Based on ThOD

Details on results:

The approximate half-life was reached by day 28, at which time 49.99% degradation of the test material was observed.

By day 14, >60% biodegradation of positive control was observed, which met the guideline requirement. No excursions from the protocol were noted.
Biodegradation was based on oxygen consumption and the theoretical oxygen demand of the test material as calculated using results of an elemental analysis of the test material.

% Degradation* Mean % Degradation
Sample (day 28) (day 28)
Test Material 52.8, 52.1, 45.1 49.99
Na Benzoate 87.2, 88.5 88.1

* replicate data

BOD5 / COD results

Results with reference substance:

Sodium benzoate biodegraded 68.1% after 3 days and 88.1% on day 28.

Applicant's summary and conclusion

Validity criteria fulfilled:

yes

Interpretation of results:

inherently biodegradable

Conclusions:

Mixed HOF reached 49.99% biodegradation in 28 d.

Executive summary:

Mixed HOF reached 49.99% biodegradation in 28 d.