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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Ecotoxicological information

Toxicity to microorganisms

Currently viewing:

Administrative data

Endpoint:
activated sludge respiration inhibition testing
Type of information:
experimental study
Adequacy of study:
other information
Study period:
1990
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: Guideline study. Basic data given.

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
1990

Materials and methods

Test guideline
Qualifier:
according to guideline
Guideline:
ISO 8192 (Water quality - Test for inhibition of oxygen consumption by activated sludge for carbonaceous and ammonium oxidation)
Version / remarks:
(1986)
GLP compliance:
no

Test material

Constituent 1
Chemical structure
Reference substance name:
Benzothiazole
EC Number:
202-396-2
EC Name:
Benzothiazole
Cas Number:
95-16-9
Molecular formula:
C7H5NS
IUPAC Name:
benzothiazole
Details on test material:
- Name of test material (as cited in study report): Benzothiazol
- Analytical purity: no data

Sampling and analysis

Analytical monitoring:
no

Test solutions

Vehicle:
not specified

Test organisms

Test organisms (species):
activated sludge

Study design

Test type:
not specified
Water media type:
freshwater
Limit test:
no
Total exposure duration:
3 h

Test conditions

Nominal and measured concentrations:
nominal: 100, 180, 320, 560 and 1000 mg/l
Details on test conditions:
nutrient solution according to ISO 8192-1986 (chapter 4.2)
Reference substance (positive control):
yes
Remarks:
3,5-dichlorophenol

Results and discussion

Effect concentrationsopen allclose all
Duration:
3 h
Dose descriptor:
EC10
Effect conc.:
274 mg/L
Nominal / measured:
nominal
Conc. based on:
test mat.
Basis for effect:
inhibition of total respiration
Remarks:
respiration rate
Duration:
3 h
Dose descriptor:
EC50
Effect conc.:
635 mg/L
Nominal / measured:
nominal
Conc. based on:
test mat.
Basis for effect:
inhibition of total respiration
Remarks:
respiration rate

Applicant's summary and conclusion