L-Glutamic acid, N-coco acyl derivs., compds. with triethanolamine (1:1)

Density

Link to relevant study record(s)

Reference

Endpoint:

relative density

Type of information:

experimental study

Adequacy of study:

key study

Study period:

27 March 2017

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:

0.97

Temp.:

20 °C

Key result

Type:

density

Density:

970 kg/m³

Temp.:

20 °C

Determining the Density of the Immersion Liquid:

- Mass of Empty Pycnometer: 24.21 g

- Volume of Pycnometer: 25.6 mL

- Mass water & Pycnometer: 49.82 g

- Density of Water: 1.002 (g/cm3) (ρ W,t)

- Mass of IL & Pycnometer: 49.18 g

- Mass IL in Pycnometer: 24.97 (g) (m1)

- Equation 1 (Calculation for the density of water):

Mass of water / volume of pycnometer = Density of water

- Equation 2 (Calculation for the density of immersion liquid):

ρIL = (m1/mw) x ρW,t

Where:

m1 is the mass of the immersion liquid

mW is the mass of water

ρW,t is the density of water at temperature t

 

Calculated value for the density of immersion liquid = 977 kg.m^-3@ 20 °C

 

Determining the Density of the Sample:

- Equation 3 (Calculation for the density of the sample): ρS,t = (ms x ρIL) / (m1 – m2)

Where:

ms is the mass, in grams, of the sample;

m1 is the mass, in grams, of immersion liquid required to fill the empty pycnometer;

m2 is the mass, in grams of immersion liquid added to fill the pycnometer containing the sample;

pIL is the density of the immersion liquid (as determined by equation 2)

 

Mean Result: Relative density (D^20 4) = 0.970. Sample density = 970 kg.m^-3 @ 20 °C

Table 1: Data for the determination of the test material density

Run Number	1	2
Mass of Empty Pycnometer (g)	24.21	24.21
Mass of Sample & Pycnometer (g)	31.33	31.97
Mass of Sample added to empty Pycnometer (g) ms	7.12	7.76
Mass of Sample, Pycnometer & immersion liquid	49.16	49.09
Mass of immersion liquid added (g) m^2	17.83	17.12
Calculated Density of Sample (g/cm^3)	0.974	0.965
Density of Sample (kg/m^3)	974	965
Mean Result (kg.m^-3)	970

 

Conclusions:

Under the conditions of this study the relative density of the test material was 0.970, the density was 970 kg/m^3 at 20 °C.

Executive summary:

The density of the test material was investigated in accordance with the standardised guideline EU Method A.3

The density was calculated from the difference in weight between the full and empty pycnometer and its known volume. The tests are run at a constant temperature, preferably 20 °C, and at least two measurements are generally performed.

Under the conditions of this study the relative density of the test material was 0.970, the density was 970 kg/m^3 at 20 °C.

Description of key information

Under the conditions of this study the relative density of the test material was 0.970, the density was 970 kg/m^3 at 20 °C.

Key value for chemical safety assessment

Relative density at 20C:

0.97

Additional information

The density of the test material was investigated in accordance with the standardised guideline EU Method A.3. The study was awarded a reliability score of 1 in accordance with the criteria set forth by Klimisch et al. (1997).

The density was calculated from the difference in weight between the full and empty pycnometer and its known volume. The tests are run at a constant temperature, preferably 20 °C, and at least two measurements are generally performed.

Under the conditions of this study the relative density of the test material was 0.970, the density was 970 kg/m^3 at 20 °C.