Bis[4-(tert-butyl)benzoato-O]hydroxyaluminium

Density

Administrative data

Endpoint:

tap density

Type of information:

experimental study

Adequacy of study:

key study

Study period:

2018-04-13 - 2018-04-25 (experimental phase)

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2018

Report date:

2018

Materials and methods

Test guideline

Test guideline 1

Qualifier:

according to guideline

Guideline:

OECD Guideline 109 (Density of Liquids and Solids)

Deviations:

no

Test guideline 2

Qualifier:

according to guideline

Guideline:

other: CIPAC MT-159

Deviations:

no

GLP compliance:

yes

Type of method:

pour and tap (for solids)

Test material

Test material information

Constituent 1

Reference substance name:

Bis[4-(tert-butyl)benzoato-O]hydroxyaluminium

EC Number:

236-109-7

EC Name:

Bis[4-(tert-butyl)benzoato-O]hydroxyaluminium

Cas Number:

13170-05-3

Molecular formula:

C22H27AlO5

IUPAC Name:

aluminum hydroxide bis(4-tert-butylbenzoate)

Test material form:

solid: particulate/powder

Results and discussion

Density

Density 1

Key result

Type:

pour density

Density:

0.26 other: g/mL

Remarks on result:

other: no temperature given, because the substance is a solid temperature is not as relevant as for liquids

Density 2

Key result

Type:

tap density

Density:

0.334 other: g/mL

Remarks on result:

other: no temperature given, because the substance is a solid temperature is not as relevant as for liquids

Density 3

Type:

relative density

Density:

0.334 other: the relative density is dimensionless

Remarks on result:

other: no temperature given, because the substance is a solid and temperature is not as relevant as for liquids; the relative density was calculated based on the results for tap density as described in section "Any other information on results incl. tables"

Any other information on results incl. tables

Measurments of Bulk density of solids

	Test Sample 1	Test Sample 2
Sample weight (g)	23.1	23.6
Pour Volume (V1, mL)	90	90
Volume (V2, mL) after tap	70	70
Pour density^1(g/mL)	0.257	0.262
Mean ± SD (g/mL)	0.260 ± 0.004
Tap density^1(g/mL)	0.330	0.337
Mean ± SD (g/mL)	0.334 ± 0.005

¹: Density in g/mL = Weight of sample divided by Volume (V₁or V₂)

Calculation of relative density

The test has been conducted as tapped bulk density and relative density has not been calculated. In order to present a value for relative density, the following assumptions have been made:

· Tapped bulk density is, in theory, the maximum bulk density that can be achieved without deformation of the particles. In practice, it is generally unrealistic to attain this theoretical tapped bulk density, and a lower value obtained after tapping the sample in a standard manner is used.

· The determination of tapped bulk density has been done at room temperature (20°C).

· The test item is not soluble in water and cannot be dispersed in water.

· Due to the partition size distribution (median particle size (D50) was determined to be 1.8 ± 0.02 µm), it is assumed that there are no aggregates in the sample.

· Thus, tapped bulk density can be used to estimate the relative density related to water at 20°C.

· Due to this estimation, possible source of error is 10%.

The calculation of relative density is shown below:

The relative density (specific gravity) of an aggregate is the ratio of its mass to the mass of an equal volume of water.

Relative Density =^{Mass of the Aggregate}/_{Mass of equal volume of water}

Tap density test item: 0.334 ± 0.005 g/mL

Tap density water: In SI units, the density of water is (approximately) 1000 kg/m³or 1 g/cm³, at 20°C

Relative density of test item = (0.334 g/ml) / (1 g/ml) = 0,334 ± 0.034 at 20°C

Applicant's summary and conclusion

Conclusions:

The study was conducted under GLP according to CIPAC MT-159 and OECD TG 109 without deviations and therefore reliability of Klimisch 1 has been assigned. Based on the obtained results the pour and tap density were determined to be 0.260 +/- 0.04 and 0.334 +/- 0.005 g/mL, respectively.

Executive summary:

The pour and tap density of the test material were determined to be 0.260 ± 0.004 and 0.334 ± 0.005 g/mL, respectively, in a GLP test according to CIPAC MT-159 and OECD TG 109.