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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Environmental fate & pathways

Biodegradation in water: screening tests

Administrative data

Endpoint:
biodegradation in water: ready biodegradability
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: Study performed in accordance with OECD Guideline and compliant with GLP criteria.

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2002
Report date:
2002

Materials and methods

Test guideline
Qualifier:
according to guideline
Guideline:
OECD Guideline 301 B (Ready Biodegradability: CO2 Evolution Test)
GLP compliance:
yes

Test material

Constituent 1
Chemical structure
Reference substance name:
(4-tert-butyl-2,6-dimethylphenyl)acetonitrile
EC Number:
284-183-4
EC Name:
(4-tert-butyl-2,6-dimethylphenyl)acetonitrile
Cas Number:
84803-57-6
Molecular formula:
C14H19N
IUPAC Name:
2-(4-tert-butyl-2,6-dimethylphenyl)acetonitrile
Details on test material:
- Substance name: 4-tert-Butyl-2,6-dimethylphenylacetonitrile

Study design

Oxygen conditions:
aerobic
Inoculum or test system:
activated sludge (adaptation not specified)
Details on inoculum:
Activated sludge from Iaboratory wastewater plant treating municipal sewage. Conc. of dry substance is ca. 30 mg/L.
Duration of test (contact time):
28 d
Initial test substance concentrationopen allclose all
Initial conc.:
24 mg/L
Based on:
test mat.
Initial conc.:
20 mg/L
Based on:
DOC
Parameter followed for biodegradation estimation
Parameter followed for biodegradation estimation:
CO2 evolution

Results and discussion

% Degradation
Value:
< 10
Sampling time:
28 d

Any other information on results incl. tables

Test concentration is equivalent to 20 mg/L TOC. Since the test substance  is poorly soluble in water, no DOC degradation was determined.

Applicant's summary and conclusion