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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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:
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
Guideline:
other:
Deviations:
no
GLP compliance:
yes (incl. QA statement)

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.