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Administrative data

Endpoint:
other: Dustiness
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2020
Report date:
2020

Materials and methods

Test guideline
Qualifier:
according to guideline
Guideline:
other: DIN 55992-1:2006 - Determination of a parameter for the dust formation of pigments and extenders - Part 1: Rotation method - Modified Heubach Method
GLP compliance:
not specified

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
Specific details on test material used for the study:
Batch PHX12 Batch PHX-411
Nickel Manganese Cobalt ratio 6:2:2

Results and discussion

Any other information on results incl. tables












































Quantity of substance used1.00 gRelative amounts of used quantityRelative amounts of the whole fraction
Total dust mass in impactor573.87 mg
MMAD23.30 µm
GSD2.40 µm
Total dustiness, whole fraction572.17 mg/g
Dustiness, inhalable fraction367.08 mg/g36.71%64.16%
Dustiness, thoracic fraction129.76 mg/g12.98%22.68%
Dustiness, alveolair fraction25.55 mg/g2.56%4.47%

Applicant's summary and conclusion

Conclusions:
As a conclustion, for the sample pNMC hydroxide 622, the respirable fraction represented 2.56% of the quantity of the substance used under the Modified Heubach procedure.
Executive summary:

Examinations were performed to determine the dustiness of a substance sample designated as "pNMC hydroxide 622". The objective of these examinations was to determine the dust fractions of this substance. These are the dust fractions which are defined in DIN EN 481 as the: 


 inhalable fraction, 


 thoracic fraction and 


 respirable fraction. 


The modified Heubach procedure was applied. In the process, the substance sample was mechanically stressed in a rotating drum (dust generation device), and both the dust already contained in this sample and the dust generated due to abrasion were removed from the dust generation device by an air current. The proportion of dust separated and considered as dust with the ability to become airborne was fed into a seven-stage cascade impactor connected to the dust generation device. Particle size classification was conducted by subsequent weighing of the respective dust masses deposited on the individual cascade stages reflecting certain particle size ranges. 


The “total dustiness” value was determined as the ratio of the mass of removed dust to the total sample mass initially weighed in. 


Subsequently, the dustiness values for the inhalable, thoracic and alveolar fractions according to DIN EN 481 were determined. 


Total dustiness: 572.17 mg/g
Inhalable fraction: 367.08 mg/g (36.71%)
Thoracic fraction: 129.76 mg/g (12.98%)
Respirable fraction: 25.55 mg/g (2.56%)
MMAD: 23.30 µm
GSD: 2.40 µm


As a conclustion, for the sample pNMC hydroxide 622, the respirable fraction represented 2.56% of the quantity of the substance used under the Modified Heubach procedure.