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Density

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Reference
Endpoint:
relative density
Type of information:
experimental study
Adequacy of study:
key study
Study period:
From 21 May 2012 to 24 August 2012
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:
yes (incl. QA statement)
Remarks:
2012-12-15
Type of method:
air comparison pycnometer (for solids)
Remarks:
Stereopycnometer
Key result
Type:
relative density
Density:
> 1.302 - < 1.306 other: no unit
Temp.:
20 °C

Results of assay No. 1

Test item sample weight (ME) 2.174 g

Reference volume (VA) 79.330 cm3

Volume of sample cell holder (VC) 33.071 cm3

Temperature during the assay 20.1 °C

Data  P2 (PSIG) P3 (PSIG) VP (cm3) Density (g/cm3) Relative density Mean relative density
Run No. 1 17.007 4.820 1.6957 1.2821 1.2821 1.302 ± 0.001*
Run No. 2 17.013 4.803 1.8653 1.1655 1.1655
Run No. 3 17.011 4.824 1.6697 1.3020 1.3020
Run No. 4 17.011 4.824 1.6697 1.3020 1.3020
Run No. 5 17.007 4.823 1.6685 1.3030 1.3030

* Remark: The runs No. 1 and 2 were not taken into account, they were not complying the quality criteria.

Results of assay No. 2

Test item sample weight (ME) 2.016 g

Reference volume (VA) 79.330 cm3

Volume of sample cell holder (VC) 33.071 cm3

Temperature during the assay 20.4 °C

Data  P2 (PSIG) P3 (PSIG) VP (cm3) Density (g/cm3) Relative density Mean relative density
Run No. 1 17.005 4.920 0.7745 2.6030 2.6030 1.305 ± 0.001*
Run No. 2 17.009 4.837 1.5463 1.3038 1.3038
Run No. 3 17.008 4.837 1.5437 1.3060 1.3060
Run No. 4 17.009 4.837 1.5463 1.3038 1.3038

*Remark: The run No. 1, was not taken into account, it was not complying the quality criteria. A leak problem occurred.

Conclusions:
The relative density mean value of the test item using the gas comparison method with the stereopycnometer was : 1.304 ± 0.002.
Executive summary:

The relative density of the REACh substance (2-Hydroxy-3-sulphopropyl) dimethyl[3-[(1-oxododecyl) amino]propyl]ammonium hydroxide (EC 242-893-1) was investigated in a GLP-compliant study performed in accordance with OECD Guideline 109 (Density of Liquids and Solids) and EU Method A.3 (Relative Density) using the gas comparison method. The mean relative density of the test item was 1.304 ± 0.002.

Description of key information

The relative density of the REACh substance (2-Hydroxy-3-sulphopropyl) dimethyl[3-[(1-oxododecyl) amino]propyl]ammonium hydroxide (EC 242-893-1) was investigated in a GLP-compliant study (Ferron, 2012) performed in accordance with OECD Guideline 109 (Density of Liquids and Solids) and EU Method A.3 (Relative Density) using the gas comparison method. The mean relative density of the test item was 1.304 ± 0.002.

Key value for chemical safety assessment

Relative density at 20C:
1.304

Additional information

The relative density of the substance EC 242-893-1 was investigated in a GLP-compliant study (Ferron, 2012) performed in accordance with standard methods, without deviations. The study is considered as reliable (Klimisch 1) and was selected as key study for the endpoint.