Benzenesulfonic acid, 4-C10-13-sec-alkyl derivs., ammonium salts

Density

Link to relevant study record(s)

Reference

Endpoint:

relative density

Type of information:

experimental study

Adequacy of study:

key study

Study period:

13 July 2017 and 06 October 2017.

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Remarks:

Study was conducted in accordance with international guidelines and in accordance with GLP. All guideline validity criteria were met.

Qualifier:

according to guideline

Guideline:

EU Method A.3 (Relative Density)

Version / remarks:

Regulation (EC) 440/2008 of 30 May 2008

Deviations:

no

Qualifier:

according to guideline

Guideline:

OECD Guideline 109 (Density of Liquids and Solids)

Version / remarks:

October 2012

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Type of method:

pycnometer method

Dynamic viscosity of test material:

Viscosity is not a REACH data requirement for Registration below Annex IX. In the absence of a prescribed data requirement, dynamic viscosity was assessed using expert judgement. The test item was deemed to have a dynamic viscosity greater than 5 Pa s. The test item was regarded to be sufficiently viscous to prevent the use of a liquid test protocol, instead a solid protocol (gas comparison pycnometer) was used to determine the relative density of the test item.

Key result

Type:

relative density

Remarks:

Mean Relative Density

Density:

1.04 other: Dimensionless quantity

Temp.:

20 °C

Type:

relative density

Density:

1.04 other: Dimensionless quantity

Temp.:

20 °C

Table 2:      Masses of Benzenesulfonic acid, 4-C10-13-sec-alkyl derivs., ammonium salts

Sample No.	Mass of empty vessel (g)	Mass of vessel and test item (g)	Mass of test item (g)
1	6.5633	17.3072	10.7439
2	6.5628	18.5662	12.0034

 

 

Table 3:  Density of Benzenesulfonic acid, 4-C10-13-sec-alkyl derivs., ammonium salts

Sample No.	Sample Volume (cm3)	Test Item Weight (g)	Temperature  (℃)	Density (g/cm^3)	Relative Density
1	10.36708	10.7439	20.0	1.04	1.04
2	11.58556	12.0034	20.0	1.04	1.04
mean:			20.0	1.04	1.04
absolute deviation:			0.0	0.00	0.00
relative deviation [%]:			0.0	0.0	0.0

 

Relative density has been determined using a nominal density of water at 4°C of 0.999972 g/cm³.

Conclusions:

The relative density of the test item was determined to be 1.04 at 20 ˚C.

Executive summary:

EU Method A.3. – The relative density of the test item was determined utilising Gas comparison pycnometer method (for solids, due to the viscosity of the test item).  The procedure employed was designed to be compatible with Method A.3. Relative Density of Commission Regulation (EC) No 440/2008 of 30 May 2008.

A sample of test item weighed and placed in a calibrated measurement chamber of known volume.  Helium was loaded at a known pressure in a calibrated reference chamber and is then expanded into the sample chamber. Once the pressure is stabilized, experimental data is recorded and the material volume is determined.  The density will be calculated from the weight of the test item and its corresponding volume at 20 °C.  Two determinations were carried out.

The mean relative density (D₄²⁰) of the test item was calculated to be 1.04, based on the ratio of the measured density of the test item relative to the density of water a 4 °C i.e.;

D₄²⁰  = test item/water

where:

test item = density of test item at 20.0 °C (g/cm³)

water = density of water at 4.0 °C (g/cm³)

Description of key information

Relative Density: D²⁰₄= 1.04; EU Method A.3.; C Bär (2017)

Key value for chemical safety assessment

Relative density at 20C:

1.04

Additional information

EU Method A.3. – The relative density of the test item was determined utilising Gas comparison pycnometer method (for solids, due to the viscosity of the test item).  The procedure employed was designed to be compatible with Method A.3. Relative Density of Commission Regulation (EC) No 440/2008 of 30 May 2008.

A sample of test item weighed and placed in a calibrated measurement chamber of known volume.  Helium was loaded at a known pressure in a calibrated reference chamber and is then expanded into the sample chamber. Once the pressure is stabilized, experimental data is recorded and the material volume is determined.  The density will be calculated from the weight of the test item and its corresponding volume at 20 °C.  Two determinations were carried out.

The mean relative density (D₄²⁰) of the test item was calculated to be 1.04, based on the ratio of the measured density of the test item relative to the density of water a 4 °C i.e.;

D₄²⁰ = test item/water

where:

test item = density of test item at 20.0 °C (g/cm³)

water = density of water at 4.0 °C (g/cm³)