3-C12-18-(even numbered)-alkylamido-N,N-dimethylpropan-1-amino oxide

Density

Link to relevant study record(s)

Reference

Endpoint:

relative density

Type of information:

experimental study

Adequacy of study:

key study

Study period:

03/07/2012 - 05/07/2012

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

GLP compliance:

yes (incl. QA statement)

Type of method:

pycnometer method

Key result

Type:

relative density

Density:

0.908 other: (corresponds to D4(20))

Temp.:

20 °C

Run number 3 revealed a relative density of 0.920 and run number 2 a relative density of 0.895. Run number 1 revealed a relative density of 0.949.

An initial test run (run 1) was completed using 3.5 g of the test material with 19.7 g of immersion liquid. A result of 830 kg/m3 was determined. The results of run 1 and run 2 were not within the 5% limit of repeatability therefore a third run was performed which showed agreement with run 2. Run 1 was considered erroneous and it is believed that this may have been due to sampling of the material. As testing had been performed in a glove box under a nitrogen atmosphere due to the hygroscopic nature of the material, sampling is believed to be the most likely reason for the discrepancy between run 1 and runs 2 & 3.

Conclusions:

The relative density of the substance was determined to be 0.908 at 20°C.

Description of key information

The relative density of the test substance was determined in a GLP study according to test method EC A.3 to be 0.908 at 20 °C, following the pycnometer method (Younis, 2013).

Key value for chemical safety assessment

Relative density at 20C:

0.908