Reaction product of 3,9-dibromobenzanthrone condensed with 2 equivalents of 1-aminoanthraquinone, subsequently further condensed under oxidative conditions

Density

Link to relevant study record(s)

Reference

Endpoint:

relative density

Type of information:

experimental study

Adequacy of study:

key study

Study period:

April 09, 2015

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

EU Method A.3 (Relative Density)

Deviations:

no

Qualifier:

according to guideline

Guideline:

OECD Guideline 109 (Density of Liquids and Solids)

Deviations:

no

GLP compliance:

no

Type of method:

air comparison pycnometer (for solids)

Key result

Type:

relative density

Density:

1.54 g/cm³

Temp.:

20 °C

Key result

Type:

relative density

Density:

1.54

Temp.:

20 °C

Results:

A measurement chamber with a volume of V_c= 7.8961 cm³and an expansion chamber with a volume of V_r= 6.0848 cm³were used.

Two test series with different weights were performed at ambient temperature (20.0 °C). For results see Table1 and Table2.

Table1: Results of the 1^sttest series

Weight: 2.0171 g	p1/ psi	p2/ psi	Volume / cm^3	DensityrPR/ g·cm^-3
1. measurement	19.557	10.171	1.3023	1.5488
2. measurement	19.521	10.152	1.3027	1.5484
3. measurement	19.509	10.146	1.3024	1.5488
Mean			1.303	1.549

Table2: Results of the 2^ndtest series

Weight: 1.9624 g	p1/ psi	p2/ psi	Volume / cm^3	DensityrPR/ g·cm^-3
1. measurement	19.539	10.174	1.2856	1.5265
2. measurement	19.520	10.166	1.2830	1.5295
3. measurement	19.613	10.217	1.2796	1.5337
Mean			1.283	1.530

Mean densityr_PRfor the two test series: 1.539 g/cm³

Relative density (compared to water at 4 °C) D₄^R: 1.54

 

 

Conclusions:

The relative density of the test item at ambient temperature (compared to water at 4 °C) was determined to be: D4R = 1.54 (20.0°C).

Executive summary:

The density of a solid in any form can be measured at ambient temperature (R) with the gas comparison pycnometer. A constant temperature of the environment of the apparatus is regulated by an air-conditioning unit and controlled with a thermometer. The apparatus with the test item is swept 10 times with 19.5 psi Helium. Thereafter, the valve to the expansion chamber (volume = V_r) is opened and a certain amount of gas (Helium, purity min. 99.99 %) is expanded from the measurement chamber (volume = V_c) containing the test item to the expansion chamber. From the pressure drop from p₁to p₂the volume of the test item V_swas calculated.

 

Study was performed in accordance with the following guidelines:

EU Method A.3 (Relative Density)

OECD Guideline 109 (Density of Liquids and Solids)

 

A measurement chamber with a volume of V_c= 7.8961 cm³and an expansion chamber with a volume of V_r= 6.0848 cm³were used.

Two test series with different weights were performed at ambient temperature (20.0 °C).

 

Mean density r_PRfor the two test series: 1.539 g/cm³

Relative density (compared to water at 4°C) D₄^R: 1.54

Description of key information

Key value determined in a laboratory study with the gas comparison pycnometer performed in accordance with OECD Guideline 109 and EU Method A.3.

Key value for chemical safety assessment

Relative density at 20C:

1.54

Additional information

The density of a solid in any form can be measured at ambient temperature (R) with the gas comparison pycnometer.

A measurement chamber with a volume of V_c= 7.8961 cm³and an expansion chamber with a volume of V_r= 6.0848 cm³ were used.

Two test series with different weights were performed at ambient temperature (20.0 °C).

Mean density r_PRfor the two test series: 1.539 g/cm³

Relative density (compared to water at 4°C) D₄^R: 1.54