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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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:
supporting study
Reliability:
3 (not reliable)
Rationale for reliability incl. deficiencies:
other: Only short summary is available

Data source

Reference
Reference Type:
other: Study report evaluation
Title:
Unnamed
Year:
1990

Materials and methods

Test guideline
Qualifier:
according to guideline
Guideline:
DIN 38412-8 (Pseudomonas Zellvermehrungshemmtest)
Deviations:
not specified
GLP compliance:
not specified

Test material

Constituent 1
Chemical structure
Reference substance name:
m-(4,5-dihydro-3-methyl-5-oxo-1H-pyrazol-1-yl)benzenesulphonic acid
EC Number:
204-303-0
EC Name:
m-(4,5-dihydro-3-methyl-5-oxo-1H-pyrazol-1-yl)benzenesulphonic acid
Cas Number:
119-17-5
Molecular formula:
C10H10N2O4S
IUPAC Name:
3-(3-methyl-5-oxo-4,5-dihydro-1H-pyrazol-1-yl)benzene-1-sulfonic acid

Test solutions

Vehicle:
not specified
Details on test solutions:
stock solution 1250 mg/l, 23 h stirred at RT (22°C)
pH adjustment from 2.6 to 6.9

Test organisms

Test organisms (species):
Pseudomonas putida
Details on inoculum:
no data

Study design

Test type:
not specified
Water media type:
not specified

Test conditions

Details on test conditions:
No details are given
Reference substance (positive control):
not specified

Results and discussion

Effect concentrationsopen allclose all
Duration:
16 h
Dose descriptor:
EC10
Effect conc.:
> 1 000 mg/L
Duration:
16 h
Dose descriptor:
EC50
Effect conc.:
> 1 000 mg/L
Duration:
16 h
Dose descriptor:
other: EC90
Effect conc.:
> 1 000 mg/L

Applicant's summary and conclusion

Validity criteria fulfilled:
not specified
Conclusions:
EC 50 of the test substance is above 1000 mg/L after 16 hours of exposure.