3,7-dimethylocta-2,6-dienenitrile

Biodegradation in water: screening tests

Link to relevant study record(s)

Reference

Endpoint:

biodegradation in water: ready biodegradability

Type of information:

experimental study

Adequacy of study:

key study

Reliability:

4 (not assignable)

Rationale for reliability incl. deficiencies:

other: Data is from study report by Commission of the European Communities

Qualifier:

according to guideline

Guideline:

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

Principles of method if other than guideline:

Ready biodegradability test was carried out to find biodegradation of chemical 3,7-dimethylocta-2,6-dienenitrile according to OECD Guideline 301 F (Ready Biodegradability: Manometric Respirometry Test).

GLP compliance:

not specified

Oxygen conditions:

not specified

Inoculum or test system:

other: Sewage + Sludge

Details on inoculum:

-Concentration of dry substance is 30mg/l.
-As inoculum a mixture of (proportion) 1: 1 of municipal sludge from laboratory wastewater treatment plants fed with municipal sewage and sludge from BASF wastewater treatment plant was used.

Duration of test (contact time):

35 d

Initial conc.:

30 mg/L

Based on:

test mat.

Parameter followed for biodegradation estimation:

other: BOD of ThOD

Reference substance:

aniline

Parameter:

other: BOD of ThOD

Value:

59

Sampling time:

10 d

Parameter:

other: BOD of ThOD

Value:

100

Sampling time:

35 d

Details on results:

No data available

Results with reference substance:

Referance substance degraded to 80 – 90 % within 14 days (10 d window covered).

Validity criteria fulfilled:

not specified

Interpretation of results:

readily biodegradable, but failing 10-day window

Conclusions:

After 35 days the test substance was degraded up to 100 % (BOD of ThOD) while in 10 days the degradation was found to be 59%. The test substance
was considered to be biodegradable.

Executive summary:

Ready biodegradability test was carried out to find biodegradation of chemical 3,7-dimethylocta-2,6-dienenitrile. As inoculum a mixture of (proportion) 1: 1 of municipal sludge from laboratory wastewater treatment plants fed with municipal sewage and sludge from BASF wastewater treatment plant was used. The concentration of the dry substance was 30 mg/l. After 35 days the test substance was degraded up to 100 % (BOD of ThOD).Hence,the test chemical 3,7-dimethylocta-2,6-dienenitrile was found to be biodegradable(10 days window was not covered)with 59% biodegradation in 10 days.

Description of key information

Ready biodegradability test was carried out to find biodegradation of chemical 3,7-dimethylocta-2,6-dienenitrile. As inoculum a mixture of (proportion) 1: 1 of municipal sludge from laboratory wastewater treatment plants fed with municipal sewage and sludge from BASF wastewater treatment plant was used. The concentration of the dry substance was 30 mg/l. After 35 days the test substance was degraded up to 100 % (BOD of ThOD). Hence, the test chemical 3,7-dimethylocta-2,6-dienenitrile was found to be biodegradable(10 days window was not covered)with 59% biodegradation in 10 days.

Key value for chemical safety assessment

Biodegradation in water:

readily biodegradable but failing 10-day window

Additional information

Ready biodegradability test was carried out to find biodegradation of chemical 3,7-dimethylocta-2,6-dienenitrile. As inoculum a mixture of (proportion) 1: 1 of municipal sludge from laboratory wastewater treatment plants fed with municipal sewage and sludge from BASF wastewater treatment plant was used. The concentration of the dry substance was 30 mg/l. After 35 days the test substance was degraded up to 100 % (BOD of ThOD). Hence, the test chemical 3,7-dimethylocta-2,6-dienenitrile was found to be biodegradable(10 days window was not covered)with 59% biodegradation in 10 days.