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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