3-chloropropene

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: The data are from an official Japanese data base that is well recognised by authorities. They are considered as reliable with restrictions although the details of the experiments are not given.

Data source

Reference

Reference Type:

publication

Title:

Biodegradation and bioaccumulation data of existing chemicals based on the CSCL Japan

Author:

Chemicals Inspection and Testing Institute

Year:

1992

Bibliographic source:

ISBN 4-89074-101-1

Materials and methods

Test guideline

Qualifier:

according to guideline

Guideline:

OECD Guideline 301 C (Ready Biodegradability: Modified MITI Test (I))

Deviations:

no

GLP compliance:

not specified

Test material

Test material information

Constituent 1

Reference substance name:

3-chloropropene

EC Number:

203-457-6

EC Name:

3-chloropropene

Cas Number:

107-05-1

Molecular formula:

C3H5Cl

IUPAC Name:

3-chloroprop-1-ene

Details on test material:

no data

Study design

Oxygen conditions:

aerobic

Inoculum or test system:

activated sludge, domestic (adaptation not specified)

Details on inoculum:

Concentration of sludge (as concentration of suspended solid): 30 mg/L

Duration of test (contact time):

28 d

Initial test substance concentration

Initial conc.:

100 mg/L

Based on:

test mat.

Parameter followed for biodegradation estimation

Parameter followed for biodegradation estimation 1

Parameter followed for biodegradation estimation:

O2 consumption

Parameter followed for biodegradation estimation 2

Parameter followed for biodegradation estimation:

TOC removal

Parameter followed for biodegradation estimation 3

Parameter followed for biodegradation estimation:

test mat. analysis

Results and discussion

% Degradation

% Degradation 1

Parameter:

% degradation (O2 consumption)

Value:

62

Sampling time:

28 d

% Degradation 2

Parameter:

% degradation (TOC removal)

Value:

66

Sampling time:

28 d

% Degradation 3

Parameter:

% degradation (test mat. analysis)

Value:

95

Sampling time:

28 d

Applicant's summary and conclusion

Validity criteria fulfilled:

yes

Interpretation of results:

readily biodegradable

Conclusions:

The modified MITI test (I) indicates a borderline case of ready biodegradability of 3-chloropropene with removal rates after 28 days of between 55 and 69 % based on BOD. Based on the available data ready biodegradability of 3-chloropropene is expected.

Executive summary:

The ready biodegradability of 3-chloropropene was studied in a modified MITI test (I). Although the documentation of the test is poor the data are considered as reliable with restrictions. The concentration of the test substance at the start of the test was 100 mg/L. The concentration of the activated domestic sludge was 30 mg/L. The cultivation temperature was 25 °C. The test was performed for 28 days. The degradation of the test material was measured by monitoring the BOD, TOC and by analysing the test material using GC. The removal of 3-chloropropene (based on BOD) was between 55 and 69 % after 28 days. Analysis of TOC resulted in a similar level, whereas analysis of the test substance indicated that 95 % of the substance had disappeared. The substance was characterised as readily biodegradable on the basis of the MITI test (I).