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Ecotoxicological information

Toxicity to microorganisms

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Administrative data

Endpoint:
toxicity to microorganisms
Type of information:
experimental study
Adequacy of study:
supporting study
Reliability:
2 (reliable with restrictions)

Data source

Reference
Reference Type:
publication
Title:
Unnamed
Year:
1995

Materials and methods

Test guideline
Qualifier:
no guideline followed
GLP compliance:
not specified

Test material

Constituent 1
Chemical structure
Reference substance name:
Acetaldehyde
EC Number:
200-836-8
EC Name:
Acetaldehyde
Cas Number:
75-07-0
Molecular formula:
C2H4O
IUPAC Name:
acetaldehyde

Sampling and analysis

Analytical monitoring:
not specified

Test solutions

Vehicle:
not specified

Test organisms

Test organisms (species):
Tetrahymena pyriformis

Study design

Test type:
static
Water media type:
freshwater
Total exposure duration:
9 h

Results and discussion

Effect concentrationsopen allclose all
Duration:
3 h
Dose descriptor:
IC50
Effect conc.:
625 mg/L
Nominal / measured:
nominal
Conc. based on:
test mat.
Basis for effect:
growth inhibition
Duration:
6 h
Dose descriptor:
IC50
Effect conc.:
44 mg/L
Nominal / measured:
nominal
Conc. based on:
test mat.
Basis for effect:
growth inhibition
Duration:
9 h
Dose descriptor:
IC50
Effect conc.:
44 mg/L
Nominal / measured:
nominal
Conc. based on:
test mat.
Basis for effect:
growth inhibition

Applicant's summary and conclusion

Validity criteria fulfilled:
not applicable