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Ecotoxicological information

Toxicity to microorganisms

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Administrative data

Endpoint:
activated sludge respiration inhibition testing
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: Basic data given, however no information was given on the purity of the test substance.

Data source

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

Materials and methods

Test guideline
Qualifier:
according to
Guideline:
other: ISO/DIS 8192 Part B
GLP compliance:
no

Test material

Reference
Name:
Unnamed
Type:
Constituent
Details on test material:
- Name of test material (as cited in study report): 4,4-Dimethyl-3-hydroxy-2H-furanon
Purity: no data
Water solubility: good

Sampling and analysis

Analytical monitoring:
no

Test organisms

Test organisms (species):
activated sludge, domestic
Details on inoculum:
Municipal activated sludge from laboratory wastewater treatment plant fed with municipal sewage. Concentration of dry substance = 1 g/l.

Study design

Test type:
static
Water media type:
freshwater
Total exposure duration:
30 min

Results and discussion

Effect concentrations
Duration:
30 min
Dose descriptor:
other: EC20
Effect conc.:
> 1 000 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