Registration Dossier
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EC number: 296-120-8 | CAS number: 92257-31-3
Density
Administrative data
Link to relevant study record(s)
- Endpoint:
- relative density
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 2017
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 109 (Density of Liquids and Solids)
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.3 (Relative Density)
- Deviations:
- no
- GLP compliance:
- no
- Type of method:
- pycnometer method
- Specific details on test material used for the study:
- Identification: C.I. Solvent Red 164 Solid
Appearance/Physical state: dark red /dark purple solid
Batch: ZA07192016
Purity: >99%
Expiry date: 18 July 2019
Storage conditions: room temperature in the dark - Key result
- Type:
- density
- Density:
- 1 090 kg/m³
- Temp.:
- 20.3 °C
- Key result
- Type:
- relative density
- Density:
- 1.09
- Temp.:
- 20.3 °C
- Conclusions:
- The density of the test item has been determined to be 1.09 x 10^3 kg/m^3 at 20.3 ± 0.5 °C and a relative density of 1.09.
- Executive summary:
Density. 1.09 x 103kg/m3 at 20.3 ± 0.5 °C, relative density 1.09, using a gas comparison pycnometer method, designed to be compatible with Method A.3 Relative Density of Commission Regulation (EC) No 440/2008 of 30 May 2008 and Method 109 of the OECD Guidelines for Testing of Chemicals, 02 October 2012.
Reference
Calibration:
The pressure readings and the calculated volume for the reference and sample cells are shown in the following table:
| Determination | P1 (psig) |
P2 (psig) |
P3 (psig) |
P4 (psig) |
Reference Cell Volume (cm3) | Sample Cell Volume (cm3) |
| 1 | 17.030 | 6.445 | 17.007 | 8.433 | 90.402 | 148.473 |
| 2 | 17.042 | 6.455 | 17.017 | 8.441 | 90.620 | 148.629 |
| 3 | 17.050 | 6.460 | 17.020 | 8.436 | 90.964 | 149.119 |
Mean reference cell volume : 90.662 cm3
Mean sample cell volume : 148.740 cm3
As the reference cell volume and sample cell volume were within the defined tolerance (90.953 ± 1.0 cm3and 149.225 ± 1.0 cm3for the reference and sample cell volumes respectively) the gas comparison pycnometer was therefore considered acceptable for use.
Sample:
The pressure readings, calculated volumes and density values obtained for the beakers and test item are shown in the following tables:
Empty Beakers:
Determination |
Replicate |
P1(sample) |
P2(sample) |
Volume |
Mean Volume (cm3) |
1 |
A |
17.004 |
6.839 |
13.986 |
14.014 |
B |
17.328 |
6.971 |
14.041 |
||
C |
17.054 |
6.860 |
14.016 |
||
2 |
A |
17.030 |
6.853 |
14.103 |
14.127 |
B |
17.037 |
6.857 |
14.142 |
||
C |
17.102 |
6.883 |
14.136 |
Beakers and TI:
Determination |
Replicate |
P1(sample) |
P2(sample) |
Volume |
Mean Volume (cm3) |
1 |
A |
17.060 |
7.952 |
44.898 |
44.926 |
B |
17.080 |
7.963 |
44.939 |
||
C |
17.069 |
7.958 |
44.942 |
||
2 |
A |
17.009 |
7.739 |
40.142 |
40.119 |
B |
17.055 |
7.759 |
40.118 |
||
C |
17.015 |
7.740 |
40.098 |
Determination |
Mean Beaker Volume (cm3) |
Mean Beaker and TI Volume (cm3) |
Volume of TI (cm3) |
Density (kg/m3) |
1 |
14.014 |
44.926 |
30.912 |
1.10 x 103 |
2 |
14.127 |
40.119 |
25.992 |
1.09 x 103 |
Mean density : 1.09 x 103 kg/m3
Relative density : 1.09
Temperature : 20.3 ± 0.5
°C
Discussion:
Duplicate determinations were performed to ensure a reproducibility of less than ± 20 kg/m3was obtained.
The mass density of a substance varies with temperature and pressure and this variance is typically negligible for solids. Increasing the temperature of a substance may decrease its density by increasing the volume of that substance. Typical thermal expansion coefficients of solids are in the order of 10-5°C-1, and the volumetric expansion of stainless steel (used as calibration spheres) at 20 °C is approximately 5.2 x 10-5°C-1. Therefore, a change in temperature of several degrees will have no significant effect on the volume and hence the density of a solid substance.
Therefore, it was considered that the difference in temperature between 20.0 °C and normal laboratory conditions did not have a significant effect on the determined density, and therefore the calculated relative density.
Description of key information
Density. 1.09 x 103kg/m3 at 20.3 ± 0.5 °C, relative density 1.09, using a gas comparison pycnometer method, designed to be compatible with Method A.3 Relative Density of Commission Regulation (EC) No 440/2008 of 30 May 2008 and Method 109 of the OECD Guidelines for Testing of Chemicals, 02 October 2012.
Key value for chemical safety assessment
- Relative density at 20C:
- 1.09
Additional information
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