Registration Dossier

Diss Factsheets

Administrative data

Endpoint:
sediment toxicity: long-term
Data waiving:
study scientifically not necessary / other information available
Justification for data waiving:
other:
Justification for type of information:
The chemical safety assessment does not indicate the need to investigate further the effects of the UVCB substance on sediment organisms (column II waiver). Instead, the substance toxicity to sediment is driven by the assessment of the individual transformed UVCB constituents (assessment entity approach). Nickel and Cobalt represent the relevant constituents that are released from pNMC hydroxide (=inorganic UVCB). The information on sediment toxicity for these elements that is provided in the summary of IUCLID Section 6 is:

Freshwater environment:
PNEC sediment for Ni: 109 mg Ni/kg dw
PNEC sediment for Co: 53.8 mgCa/kg dw

Marine environment:
PNEC sediment for Ni: 109 mg Ni/kg dw
PNEC sediment for Co: 69.8 mg Co/kg dw

Data source

Materials and methods

Test material

1
Reference substance name:
Nickel Cobalt Manganese Hydroxide
Cas Number:
189139-63-7
Molecular formula:
Molecular formula: Ni1-x-yMnxCoy(OH)2, Stoechiometry of (Me = Ni + Co + Mn) equals 1, ranges of the elements approx. as: Ni/Me = 0.25 – 0.95 Mn/Me = 0.02 – 0.40 Co/Me = 0.02 – 0.40 OH = 2.00
IUPAC Name:
Nickel Cobalt Manganese Hydroxide
Constituent 1
Chemical structure
Reference substance name:
Manganese dihydroxide
Cas Number:
18933-05-6
Molecular formula:
Mn(OH)2
IUPAC Name:
Manganese dihydroxide
Constituent 2
Chemical structure
Reference substance name:
Cobalt dihydroxide
EC Number:
244-166-4
EC Name:
Cobalt dihydroxide
Cas Number:
21041-93-0
Molecular formula:
CoH2O2
IUPAC Name:
cobalt(2+) dihydroxide
Constituent 3
Chemical structure
Reference substance name:
Nickel dihydroxide
EC Number:
235-008-5
EC Name:
Nickel dihydroxide
Cas Number:
12054-48-7
Molecular formula:
H2NiO2
IUPAC Name:
nickel(2+) dihydroxide
Test material form:
solid: particulate/powder

Results and discussion

Effect concentrations
Remarks on result:
not measured/tested
Remarks:
Data on the substance toxicity to sediment organisms is driven by the assessment of the individual transformed UVCB constituents (assessment entity approach). Relevant information is reported in the IUCLID summary, Section 7

Applicant's summary and conclusion