Tetrakis(pentane-2,4-dionato-O,O')zirconium

Particle size distribution (Granulometry)

Administrative data

Endpoint:

particle size distribution (granulometry)

Type of information:

experimental study

Adequacy of study:

key study

Study period:

28 March 2019

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Cross-reference

Reason / purpose for cross-reference:

reference to other study

Reference

Endpoint:

relative density

Type of information:

experimental study

Adequacy of study:

key study

Study period:

Jan - March 2019

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

EU Method A.3 (Relative Density)

Version / remarks:

2016

Deviations:

no

Qualifier:

according to guideline

Guideline:

OECD Guideline 109 (Density of Liquids and Solids)

Version / remarks:

2012

Deviations:

no

Qualifier:

according to guideline

Guideline:

EPA OPPTS 830.7300 (Density / Relative Density / Bulk Density)

Version / remarks:

2002

Deviations:

no

GLP compliance:

yes

Type of method:

air comparison pycnometer (for solids)

Specific details on test material used for the study:

TREATMENT OF TEST MATERIAL PRIOR TO TESTING
The test item was reduced by grinding using a mortar and dried in a desiccator under vacuum using silica gel as the drying agent at 18.7 ± 0.2°C for 45 hours.

Dynamic viscosity of test material:

not applicable (substance is a solid)

Key result

Type:

relative density

Density:

1.42 other: dimensionless

Temp.:

20 °C

Remarks on result:

other: D 20 /4

Key result

Type:

density

Density:

1.42 g/cm³

Temp.:

20 °C

Experiment 1: 1.422 g/cm^3

Experiment 2: 1.423 g/cm^3

The individual measurements were obtained with an accuracy of < 0.02 g/cm^3.

Conclusions:

The relative density D20/4 of the substance was determined to be 1.42.

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2019

Materials and methods

Test guideline

Test guideline 1

Qualifier:

according to guideline

Guideline:

ISO 13320 (Particle size analysis - Laser diffraction methods)

Version / remarks:

2009

Deviations:

no

Test guideline 2

Qualifier:

according to guideline

Guideline:

other: • CIPAC MT 187: Particle Size Analysis by Laser Diffraction, Handbook K

Version / remarks:

2007

Deviations:

no

Principles of method if other than guideline:

According to REACH Article 13(3) tests on substances shall be conducted in accordance with the test methods laid down in a Commission Regulation or in accordance with other international test methods recognised by the Commission or the Agency as being appropriate. No particle size distribution test method is laid down in regulation (EC) No 440/2008. OECD 110 TG ‘Particle Size Distribution/FibreLength and Diameter Distributions’ dates from 1981 and describes two methods in detail; both methods have restrictions and are not applicable to the entire size range. ECHA’s Guidance on information requirements and Chemical Safety Assessment-Chapter R.7a stipulates that many methods are available for particle size measurements but none of them is applicable to the entire size range.
The guidance mentions Laser scattering/diffraction as a method for particles of all kinds and makes reference to ISO 13320:2009.

According to Guidance document EUR 20268 (2002), the laser diffraction technique is applicable to particles of respirable and inhalable size. The MMAD can be calculated when the density is known.

GLP compliance:

yes

Type of method:

Laser scattering/diffraction

Type of particle tested:

primary particle

Type of distribution:

volumetric distribution

Test material

Test material information

Constituent 1

Reference substance name:

Tetrakis(pentane-2,4-dionato-O,O')zirconium

EC Number:

241-510-5

EC Name:

Tetrakis(pentane-2,4-dionato-O,O')zirconium

Cas Number:

17501-44-9

Molecular formula:

C20H28O8Zr

IUPAC Name:

2,4,8,8,10,10,13,15-octamethyl-1λ³,5λ³,7λ³,7λ³,11λ³,11λ³,12λ³,16λ³-octaoxa-6-zirconadispiro[5.5⁶.5⁶.5⁶]henicosa-1,4,7,7,10,10,12,15-octaene-6,6,6,6-tetrakis(ylium)-3,9,9,14-tetraide

Test material form:

solid: particulate/powder

Details on test material:

- Identification: Zirconium (IV) acetylacetonate (Zr-acac)
- Description: White to off-white powder
- Storage conditions: At room temperature

Specific details on test material used for the study:

Relative density: 1.42
The test item was tested as received.

Results and discussion

Mass median aerodynamic diameter:

2 598 µm

Geometric standard deviation:

1.487

Particle size

Particle size 1

Key result

Percentile:

D10

Mean:

1 300 µm

St. dev.:

12.4

Particle size 2

Key result

Percentile:

D50

Mean:

2 180 µm

St. dev.:

3.22

Particle size 3

Key result

Percentile:

D90

Mean:

3 010 µm

St. dev.:

1.06

Particle size distribution at different passages

Size:

< 10 µm

Distribution:

0 %

Remarks on result:

other: volume of sample

Applicant's summary and conclusion

Conclusions:

The particle size distribution of the substance was determined as follows: D10 = 1300 μm, D50 = 2180 μm and D90 = 3010 μm.
There were no particles smaller than 10 μm detected in the tested sample volume.
The MMAD was calculated to be 2598 μm.