Tricobalt bis(orthophosphate)

Density

Administrative data

Endpoint:

density, other

Remarks:

skeletal density

Type of information:

experimental study

Adequacy of study:

key study

Study period:

June 2022

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

comparable to guideline study

Cross-reference

Reason / purpose for cross-reference:

reference to same study

Reference

Endpoint:

particle size distribution (granulometry)

Type of information:

experimental study

Adequacy of study:

key study

Study period:

June 2022

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

comparable to guideline study

Reason / purpose for cross-reference:

reference to same study

Qualifier:

equivalent or similar to guideline

Guideline:

OECD Guideline 110 (Particle Size Distribution / Fibre Length and Diameter Distributions - Method A: Particle Size Distribution (effective hydrodynamic radius)

Principles of method if other than guideline:

To determine the Volumetric Particle Size Distribution using the Microtrac S3500 Particle Size Analyzer, a small amount of pigment along with 2-3 drops of Tamol SG-1 dispersant was added to the mixing tank. When the appropriate concentration was achieved, the ultrasonic probe turned on and the PSD analysis commenced. Three readings were taken, and the average was calculated. Reference: ASTM B822.

GLP compliance:

no

Type of method:

Laser scattering/diffraction

Type of distribution:

volumetric distribution

Mass median aerodynamic diameter:

2.8 µm

Geometric standard deviation:

1.1

Percentile:

D10

Mean:

1.4 µm

St. dev.:

1.1

Key result

Percentile:

D50

Mean:

2.7 µm

St. dev.:

11

Percentile:

D90

Mean:

4.4 µm

St. dev.:

1.1

Conclusions:

The test item has following particle size distribution:
mean = 2.8 µm
d90= 4.4 µm
d50= 2.7 µm
d10= 1.4 µm

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2022

Report date:

2022

Materials and methods

Test guideline

Qualifier:

equivalent or similar to guideline

Guideline:

OECD Guideline 109 (Density of Liquids and Solids)

Principles of method if other than guideline:

To determine the skeletal density of the pigment by helium gas displacement, a sample was dried using an IR balance and then transferred to the Accupyc II 1340 Pycnometer. The instrument took three readings and the average was calculated. Reference: ASTM D5965 Test Method B.

GLP compliance:

no

Type of method:

air comparison pycnometer (for solids)

Test material

Test material information

Constituent 1

Reference substance name:

Tricobalt bis(orthophosphate)

EC Number:

236-655-6

EC Name:

Tricobalt bis(orthophosphate)

Cas Number:

13455-36-2

Molecular formula:

Co3(PO4)2

IUPAC Name:

tricobalt bis(orthophosphate)

impurity 1

Reference substance name:

Dicobalt diphosphate

EC Number:

238-689-7

EC Name:

Dicobalt diphosphate

Cas Number:

14640-56-3

Molecular formula:

Co2P2O7

IUPAC Name:

dicobalt diphosphate

impurity 2

Reference substance name:

cobalt phosphate octahydrate

Cas Number:

10294-50-5

Molecular formula:

Co3(PO4)2.8H2O

IUPAC Name:

cobalt phosphate octahydrate

Test material form:

solid: particulate/powder

Dynamic viscosity of test material:

Not applicable: test material is a powder

Results and discussion

Density

Key result

Type:

other: skeletal density

Density:

3.8 g/cm³

Temp.:

120 °C

Applicant's summary and conclusion

Conclusions:

The skeletal density of the test item was determined to be 3.8 g/ cm³ at 120°C by a helium pycnometer.