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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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 other aquatic organisms

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Administrative data

Endpoint:
toxicity to other aquatic vertebrates
Type of information:
calculation (if not (Q)SAR)
Remarks:
Estimated by calculation
Adequacy of study:
supporting study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: see 'Remark'
Remarks:
Study conducted to basic scientific principles.Read-across from MnSO4 to MnCl2 is considered scientifically valid, as the anions are not expected to exhibit different ecotoxicity and in both cases the cation Mn2+ is common to both substances and both substances are very soluble in water.
Justification for type of information:
See the read-across report attached in Section 13.
Cross-reference
Reason / purpose for cross-reference:
other: read-across target
Reference
Endpoint:
toxicity to other aquatic vertebrates
Type of information:
read-across from supporting substance (structural analogue or surrogate)
Adequacy of study:
supporting study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: Study conducted on read-across material
Justification for type of information:
See the read-across report attached in Section 13.
Reason / purpose for cross-reference:
read-across source
Duration:
10 d
Dose descriptor:
EC50
Effect conc.:
20.8 mg/L
Conc. based on:
other: Mn
Basis for effect:
mortality

Data source

Reference
Reference Type:
publication
Title:
Toxicity of manganese and zinc to Boreal toad tadpoles (Bufo boreas)
Author:
Davis H, Brinkman S and McIntyre M
Year:
1998
Bibliographic source:
Federal aid project #F-243R-5, , Colorado Division of Wildlife, Fort Collins, Colorado

Materials and methods

Test guideline
Qualifier:
no guideline available
GLP compliance:
not specified

Test material

Constituent 1
Reference substance name:
Manganese sulphate
IUPAC Name:
Manganese sulphate
Details on test material:
- Name of test material (as cited in study report): Manganese sulphate monohydrate

Sampling and analysis

Analytical monitoring:
not specified

Test organisms

Test organisms (species):
Bufo boreas

Study design

Test type:
semi-static
Water media type:
freshwater
Limit test:
no
Total exposure duration:
10 d

Results and discussion

Effect concentrations
Duration:
10 d
Dose descriptor:
EC50
Effect conc.:
20.8 mg/L
Conc. based on:
other: Mn
Basis for effect:
mortality

Any other information on results incl. tables

Manganese concentrations were stable throughout the 24 hour period between renewals.

Mortality did not occur in manganese exposures of 10 mg Mn/L or less. In the 50 mg/L exposure, 40% mortality occurred by 96 hours leading to complete mortality by 168 hours. Mortality in the 100 mg/L exposure started as soon as 24 hours and resulted in complete mortality by 96 hours. The 96 and 168 hour LC50 were 42.3 and 20.8 mg Mn/L respectively

Applicant's summary and conclusion

Validity criteria fulfilled:
not applicable
Conclusions:
The LC50 was 42.3 mg Mn/L