Registration Dossier
Registration Dossier
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EC number: 946-329-1 | CAS number: -
Additional ecotoxological information
Administrative data
- Endpoint:
- additional ecotoxicological information
- Type of information:
- experimental study
- Adequacy of study:
- weight of evidence
- Study period:
- 1983
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- study well documented, meets generally accepted scientific principles, acceptable for assessment
Data source
Reference
- Reference Type:
- publication
- Title:
- A seven-day life-cycle cladoceran toxicity test
- Author:
- Mount DI, Norberg TJ
- Year:
- 1 984
- Bibliographic source:
- Environmental Toxicology and Chemistry, Vol. 3, pp. 425-434
Materials and methods
- GLP compliance:
- not specified
Test material
- Reference substance name:
- Zinc
- EC Number:
- 231-175-3
- EC Name:
- Zinc
- Cas Number:
- 7440-66-6
- IUPAC Name:
- zinc
Constituent 1
Results and discussion
Any other information on results incl. tables
The following LC50 (48 h) values were obtained for zinc tested on different cladoceran species (95 % confidence limits in parentheses):
Daphnia magna: 0.068 mg/L
Daphnia pulex: 0.107 (0.076 - 0.151) mg/L
Ceriodaphnia reticulata: 0.076 (0.061 - 0.093) mg/L
Applicant's summary and conclusion
- Conclusions:
- No significant interspecies variation in the sensitivity to zinc between the three tested Cladoceran species was observed.
The following LC50 (48 h) values were obtained for zinc tested on different cladoceran species (95 % confidence limits in parentheses):
Daphnia magna: 0.068 mg/L
Daphnia pulex: 0.107 (0.076 - 0.151) mg/L
Ceriodaphnia reticulata: 0.076 (0.061 - 0.093) mg/L - Executive summary:
Comparative 48-h LC50 data for four cladoceran species were derived in static-nonmeasured tests performed using dilution water from a natural lake with a hardness of 45 mg/L and alkalinity of 43 to 45 mg/L, both as CaCO3. The pH was 7.2 to 7.4 and the water contained 50,000 to 100,000 bacterial cells/mL.
No significant interspecies variation in the sensitivity to zinc between the three tested Cladoceran species was observed.
The following LC50 (48 h) values were obtained for zinc tested on different cladoceran species (95 % confidence limits in parentheses):
Daphnia magna: 0.068 mg/L
Daphnia pulex: 0.107 (0.076 - 0.151) mg/L
Ceriodaphnia reticulata: 0.076 (0.061 - 0.093) mg/L
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