2-(6-methoxybenzofuran-2-yl)-1,3-dimethyl-5-(methylsulphonyl)1H-benzimidazolium acetate

Additional information on environmental fate and behaviour

Administrative data

Endpoint:

additional information on environmental fate and behaviour

Type of information:

experimental study

Adequacy of study:

weight of evidence

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

study well documented, meets generally accepted scientific principles, acceptable for assessment

Data source

Reference

Reference Type:

other company data

Title:

Unnamed

Year:

1974

Report date:

1974

Materials and methods

Test guideline

Qualifier:

equivalent or similar to guideline

Guideline:

other: Internal SOP "A12 Activated sludge dynamic test (1976)"

Principles of method if other than guideline:

At testing laboratory, acute biodegradation in sewage sludge was performed according to published methods, which were adapted and standardized for the specific needs of the company, well before Test Guidelines for these methods were established by the OECD beginning 1981.

GLP compliance:

no

Test material

Test material information

Constituent 1

Reference substance name:

Fluorescent Brightener 363

IUPAC Name:

Fluorescent Brightener 363

Results and discussion

Any other information on results incl. tables

Biological elimination observed after 21 days: 0 % based on TOC removal.

Applicant's summary and conclusion

Conclusions:

Bilogical elimnation (21d): 0 %, based on TOC removal

Executive summary:

The biological elimination of the test substance was investigated in a study conducted according to internal method " Method A-12 Activated Sludge Dynamic Test", which is equivalent to the OECD confirmatory test or Dynamic stimulation test (1976). At testing laboratory, acute biodegradation in sewage sludge was performed according to published methods, which were adapted and standardized for the specific needs of the company, well before Test Guidelines for these methods were established by the OECD beginning 1981. The results of these studies were reported until the early 1980s in summery reports, which do not present details of the methods used, but focus on a summary presentation of results.

The biological elimination was measured in terms of TOC removal. The initial concentration used was 20 mg/l TOC or 40.8 mg/l of test substance. However no bilogical elimnation was observed at the end of the observation period of 21 days.

Conclusion

Bilogical elimnation (21d): 0 %, based on TOC removal