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Ecotoxicological information

Toxicity to microorganisms

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Endpoint:
toxicity to microorganisms
Type of information:
experimental study
Adequacy of study:
weight of evidence
Study period:
May 29, 1998
Reliability:
4 (not assignable)
Rationale for reliability incl. deficiencies:
abstract
Remarks:
No information on composition available. The test was conducted on a similar substance. Further details were reported in the attachment at section 13.
Principles of method if other than guideline:
Only short abstract available, no further information on the method used.
GLP compliance:
not specified
Test organisms (species):
activated sludge
Water media type:
freshwater
Total exposure duration:
3 h
Duration:
3 h
Dose descriptor:
EC50
Effect conc.:
ca. 4 mg/L

Only short abstract available. No further information available

Validity criteria fulfilled:
not specified
Conclusions:
EC50 (3h) = 4 mg/l
Executive summary:

Method

The test on "Toxicity to microorganisms" was conducted with an unspecified method as only short abstract is available for this study.

Conclusion

EC50 (3h) = 4 mg/l

Endpoint:
toxicity to microorganisms
Type of information:
other: read-across from supporting substance (structural analogue or surrogate)
Adequacy of study:
weight of evidence
Study period:
August 08, 1989
Reliability:
4 (not assignable)
Rationale for reliability incl. deficiencies:
abstract
Remarks:
No information on composition available. The test was conducted on a similar substance. Further details were reported in the attachment at section 13.
Principles of method if other than guideline:
Only short abstract available. No information about the method used.
GLP compliance:
not specified
Details on sampling:
- Concentrations: 19.5, 39, 78, 156, 312 mg/l
Test organisms (species):
other: No information available
Total exposure duration:
3 h
Test temperature:
25 °C
pH:
7.1 - 7.2
Dose descriptor:
EC10
Effect conc.:
ca. 40 mg/L
Remarks on result:
other: No further information available
Dose descriptor:
EC50
Effect conc.:
ca. 77 mg/L
Remarks on result:
other: No further information available
Dose descriptor:
other: EC90
Effect conc.:
ca. 213 mg/L
Remarks on result:
other: No further information available

Only short abstract available. No further information available.

Validity criteria fulfilled:
not specified
Conclusions:
EC10 = 40 mg/l
EC50 = 77 mg/l
EC90 = 213 mg/l
Executive summary:

Method

The test was conducted with an unspecified method as only short abstract is available for this study. No information on the composition is available.

Conclusion

EC10 = 40 mg/l

EC50 = 77 mg/l

EC90 = 213 mg/l

Endpoint:
toxicity to microorganisms
Type of information:
experimental study
Adequacy of study:
weight of evidence
Study period:
March 25, 1976
Reliability:
4 (not assignable)
Rationale for reliability incl. deficiencies:
abstract
Principles of method if other than guideline:
Internal method 58
GLP compliance:
not specified
Total exposure duration:
3 h
Duration:
3 h
Dose descriptor:
EC50
Effect conc.:
ca. 50 mg/L
Nominal / measured:
not specified
Conc. based on:
not specified
Basis for effect:
not specified
Validity criteria fulfilled:
not specified
Conclusions:
EC50 = 50 mg/l
Executive summary:

Only short abstract available.

EC50 = 50 mg/l

Description of key information

LC50 = 4 mg/l

Key value for chemical safety assessment

EC50 for microorganisms:
4 mg/L

Additional information

The test substance was tested for its toxicity to microorganisms. No information on the composition and method used for the execution of the study is available.

The LC50 value calculated on the substance in itself was 4 mg/l after 3 hours. To support this information a test on an analogue molecule, a different salification of the same core structure (Similar Substance 01) is available. Further information regardig the acceptability of the Read Across is reported in the attachment at section 13.

The test on the Similar Substance 01 was determined with an unknown method. The LC50 value observed during this test was 77 mg/l.