Registration Dossier

Diss Factsheets

Administrative data

Endpoint:
activated sludge respiration inhibition testing
Data waiving:
study scientifically not necessary / other information available
Justification for data waiving:
the study does not need to be conducted because the substance is highly insoluble in water, hence indicating that aquatic toxicity is unlikely to occur
other:
Justification for type of information:
Data on the substance toxicity to STP microorganisms is driven by the assessment of the individual transformed UVCB constituents (assessment entity approach). The following relevant information is reported in the IUCLID summaries of Section 6:

PNEC STP for Ni: 0.33 mg Mi/L
PNEC STP for Co: 0.37 mg Co/L

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

Applicant's summary and conclusion