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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 16 May 2012 to 25 January 2013
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Reason / purpose:
reference to same study
Qualifier:
according to
Guideline:
OECD Guideline 109 (Density of Liquids and Solids)
Deviations:
no
Qualifier:
according to
Guideline:
EU Method A.3 (Relative Density)
Deviations:
no
GLP compliance:
yes (incl. certificate)
Remarks:
2012-12-15
Type of method:
air comparison pycnometer (for solids)
Key result
Type:
relative density
Density:
1.22 other: dimensionless
Temp.:
20 °C

Results Assay No. 1

Test item sample weight (ME) 20.0055 g

Reference volume (VA) 79.330 cm3

Temperature during the assay 20.0 °C

Data P2 P2 (PSIG) P3 (PSIG) VP (cm3) Density (g/cm3) Relative density  Mean relative density 
Run No. 1 17.003 10.736 16.3267 1.2253 1.2253 1.223 ± 0.001
Run No. 2 17.003 10.735 16.3611 1.2227 1.2227
Run No. 3 17.001 10.734 16.3521 1.2234 1.2234
Run No. 4 17.001 10.733 16.3864 1.2209 1.2209
Run No. 5 17.000 10.733 16.3647 1.2225 1.2225

Remark: The runs No. 1 and 4 were not taken into account, they were not complying the quality criteria.

Reuslts Assay No. 2

Test item sample weight (ME) 20.7138 g

Reference volume (VA) 79.330 cm3

Temperature during the assay 20 °C

Data P2 P2 (PSIG) P3 (PSIG) VP (cm3) Density (g/cm3) Relative density  Mean relative density 
Run No. 1 17.000 10.714 17.0152 1.2174 1.2174 1.217 ± 0.001
Run No. 2 17.003 10.722 16.8065 1.2325 1.2325
Run No. 3 17.003 10.720 16.8748 1.2275 1.2275
Run No. 4 17.000 10.714 17.0152 1.2174 1.2174
Run No. 5 17.002 10.717 16.9558 1.2216 1.2216
Run No. 6 17.000 10.713 17.0493 1.2149 1.2149
Run No. 7 17.000 10.710 17.1516 1.2077 1.2077
Run No. 8 17.000 10.714 17.0152 1.2174 1.2174

Remark: The runs No. 2, 3, 5, 6 and 7 were not taken into account, they were not complying the quality criteria.

Conclusions:
The relative density mean value of the test item using the gas comparison method with the stereopycnometer was 1.220 ± 0.003.
Executive summary:

The relative density of the test item (= substance EC 939-455-3) 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). The mean relative density of the test item using the gas comparison method was 1.220 ± 0.003.

Description of key information

The relative density of the substance 1-Propanaminium, N-(3-aminopropyl)-2-hydroxy-N,N-dimethyl-3-sulfo-, N-(C8-18(even numbered) acyl) derivs., hydroxides, inner salts (EC 939-455-3) was investigated in a GLP-compliant study (Ricau, 2013) performed in accordance with OECD Guideline 109 (Density of Liquids and Solids) and EU Method A.3 (Relative Density). The mean relative density of the substance using the gas comparison method was 1.220 ± 0.003.

Key value for chemical safety assessment

Relative density at 20C:
1.22

Additional information

The relative density of the substance 1-Propanaminium, N-(3-aminopropyl)-2-hydroxy-N,N-dimethyl-3-sulfo-, N-(C8-18(even numbered) acyl) derivs., hydroxides, inner salts (EC 939-455-3) was investigated in a GLP-compliant study (Ricau, 2013) 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.