Reaction Mass of 3,3-diphenylhexamethyltrisiloxane and 3,3,5,5-tetraphenylhexamethyltetrasiloxane

Density

Link to relevant study record(s)

Reference

Endpoint:

relative density

Type of information:

experimental study

Adequacy of study:

key study

Study period:

2004-09-23

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

EU Method A.3 (Relative Density)

Version / remarks:

December 1992

Deviations:

no

Qualifier:

according to guideline

Guideline:

OECD Guideline 109 (Density of Liquids and Solids)

Version / remarks:

July 27 1995

Deviations:

no

GLP compliance:

yes

Type of method:

oscillating densitimeter

Key result

Type:

relative density

Density:

0.993 other: unitless

Temp.:

20 °C

As the density of the test item was determined at 20°C, the relative density is stated.

First, the apparatus was tested by determination of the density of air and water at 20°C. The results for water are given in Table 1. These values are in the accepted range of 0.9982 ± 0.0003 g/cm³.

Table 2 shows the individual measurements for the density of the test item. From these, the mean value was calculated, corrected for the relative density and given in the same table. the tabulated values represent rounded results obtained from calculation using the exact raw data.

Table 1: Results of the calibration using Air and Water

The density of air was measured to be 0.0012 g/cm3.

Test No.	Temperature [°C]	Density of water [g/cm^3]
		Measured	Mean value	Theoretical value
1	20.0	0.9982	0.9982	0.9982
2	20.0	0.9982
3	20.0	0.9982

Table 2: Determination of the density of the test item

 

Test No.	Temperature [°C]	Density of test item [g/cm^3]
		Measured	Mean value	Theoretical value
1	20.0	0.9929	0.9929	0.9929
2	20.0	0.9929

 

Calculation of the relative density

D²⁰₄ = 0.9929/0.99997 = 0.9929

Conclusions:

A relative density value of 0.9929 at 20°C was determined for the substance using a relevant test method and in compliance with GLP. The result is considered to be reliable.

Description of key information

Relative density: 0.9929 at 20°C (OECD 109)

Key value for chemical safety assessment

Relative density at 20C:

0.993

Additional information

A relative density value of 0.9929 at 20°C was determined for the submission substance using an oscillating densitometer in accordance with OECD Test Guideline 109 and in compliance with GLP. The result is considered to be reliable.