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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:
other information
Study period:
July 1992
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: well documented GLP study

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
1993
Report Date:
1993

Materials and methods

Test guideline
Qualifier:
according to
Guideline:
other:
Deviations:
no
GLP compliance:
yes (incl. certificate)

Test material

Reference
Name:
Unnamed
Type:
Constituent

Sampling and analysis

Analytical monitoring:
no

Test solutions

Vehicle:
no

Test organisms

Test organisms (species):
Pseudomonas putida

Study design

Test type:
static
Water media type:
freshwater
Limit test:
no
Total exposure duration:
16 h

Results and discussion

Effect concentrations
Duration:
16 h
Dose descriptor:
EC10
Effect conc.:
> 10 g/L
Nominal / measured:
nominal
Conc. based on:
test mat.
Basis for effect:
growth inhibition

Applicant's summary and conclusion

Validity criteria fulfilled:
yes
Conclusions:
The EC50/16h was higher than the highest concentration (10 g/L). Therefore the EC10/EC50 was higher than 10 g/L.
Executive summary:

The test substance was incubated with bacteria Pseudomonas putida over a period of 16h. The test concentrations were 0, 0.1, 1, 10, 100, 1000, 10000 g/L.The bacterial growth was measured on the basis of a turbidity analysis by means of a spectrophotometer. Non of the concentration results differed from those of the controls. Thus, there was no indication that the testcompound affected bactrila growth.