2-chlorobenzothiazole

Hydrolysis

Administrative data

Endpoint:

hydrolysis

Type of information:

experimental study

Adequacy of study:

other information

Study period:

1990

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

other: Study meets generally accepted scientific principles

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2003

Report date:

1990

Materials and methods

Principles of method if other than guideline:

Test designed to check stability of substance in dilute aquatic solutions including an artificial environmental medium

GLP compliance:

no

Test material

Test material information

Constituent 1

Reference substance name:

2-chlorobenzothiazole

EC Number:

210-415-0

EC Name:

2-chlorobenzothiazole

Cas Number:

615-20-3

Molecular formula:

C7H4ClNS

IUPAC Name:

2-chloro-1,3-benzothiazole

Details on test material:

purity >99 % w/w

Study design

Analytical monitoring:

yes

Details on sampling:

Samples for analysis were taken at 6 or 7 sampling intervals between 0 and 72 hours after start of incubation

Buffers:

Media (including algae nutrient medium containing trace amounts of inorganic components, e.g. heavy metals) see below
An amount of 2-Chloro-1,3-benzothiazole was dissolved in buffer solution (pH 7 or pH 9) or in nutrient medium. The final initial concentration of the test substance in the different test solutions was 20 mg/l.

Estimation method (if used):

Test solutions exposed to different environmental conditions over a period of three days were analysed for the content of 2-Chloro-1,3-benzothiazole in order to examine the stability of the substance in aqueous test solutions.

Duration of test

Duration of test 1

Duration:

3 d

pH:

7

Temp.:

50 °C

Initial conc. measured:

ca. 20 mg/L

Duration of test 2

Duration:

3 d

pH:

9

Temp.:

50 °C

Initial conc. measured:

20 mg/L

Number of replicates:

3

Positive controls:

no

Negative controls:

no

Results and discussion

Preliminary study:

in the dark (personal communication)

Transformation products:

not measured

Details on results:

Under all test conditions and at all sampling time points, the concentration of the substance was 20 mg/L

Any other information on results incl. tables

As there was no decrease of concentration observed in the media, the substance is stable under the experimental conditions

Applicant's summary and conclusion

Validity criteria fulfilled:

yes

Conclusions:

Under the test conditions, no degradation of 2-chloro-1,3-benzothiazole was observed.

Executive summary:

In a test designed to evaluate the stability of the substance in dilute aquatic media in the light and in the presence of air, the concentration of the substance did not decrease during three days at 50 °C in buffer at pH 7, in buffer at pH 9, and in a simulated environmental medium (algal nutrient medium containing traces of heavy metals, pH 9 after 3 d).