α,α,α,2-tetrachlorotoluene

Biodegradation in water: screening tests

Administrative data

Endpoint:

biodegradation in water: ready biodegradability

Type of information:

experimental study

Adequacy of study:

key study

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

1990

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:

α,α,α,2-tetrachlorotoluene

EC Number:

218-377-7

EC Name:

α,α,α,2-tetrachlorotoluene

Cas Number:

2136-89-2

Molecular formula:

C7H4Cl4

IUPAC Name:

1-chloro-2-(trichloromethyl)benzene

Specific details on test material used for the study:

purity 99.4%

Study design

Oxygen conditions:

aerobic

Inoculum or test system:

activated sludge, industrial, non-adapted

Details on inoculum:

Inoculum concentration 100mg/L

Duration of test (contact time):

28 d

Initial test substance concentration

Initial conc.:

30 mg/L

Based on:

test mat.

Parameter followed for biodegradation estimation

Parameter followed for biodegradation estimation:

O2 consumption

Reference substance

Reference substance:

aniline

Results and discussion

% Degradation

Parameter:

% degradation (O2 consumption)

Value:

11

Sampling time:

28 d

BOD5 / COD results

Results with reference substance:

83% biodegradation, based on oxygen consumption

Applicant's summary and conclusion

Validity criteria fulfilled:

yes

Interpretation of results:

not readily biodegradable

Conclusions:

The test item is not readily biodegradable.