Nickel Cobalt Manganese Hydroxide

Additional physico-chemical information

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

Test material information

1

Reference substance name:

Nickel Cobalt Manganese Hydroxide

EC Number:

839-353-8

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

Reference substance name:

Manganese dihydroxide

Cas Number:

18933-05-6

Molecular formula:

Mn(OH)2

IUPAC Name:

Manganese dihydroxide

Constituent 2

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

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 used	1.00 g	Relative amounts of used quantity	Relative amounts of the whole fraction
Total dust mass in impactor	573.87 mg
MMAD	23.30 µm
GSD	2.40 µm
Total dustiness, whole fraction	572.17 mg/g
Dustiness, inhalable fraction	367.08 mg/g	36.71%	64.16%
Dustiness, thoracic fraction	129.76 mg/g	12.98%	22.68%
Dustiness, alveolair fraction	25.55 mg/g	2.56%	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.