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Density

Link to relevant study record(s)

Reference

Endpoint:

relative density

Type of information:

experimental study

Adequacy of study:

key study

Study period:

From 11 June 2012 to 13 July2012

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

other: Study conducted in compliance with international standard guidelines under GLP conditions. The study report was well documented with all mandatory information included

Qualifier:

according to guideline

Guideline:

OECD Guideline 109 (Density of Liquids and Solids)

Deviations:

no

Qualifier:

according to guideline

Guideline:

EU Method A.3 (Relative Density)

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Remarks:

11-04-11

Type of method:

pycnometer method

Type:

density

Density:

> 1.108 - < 1.109 g/cm³

Temp.:

20 °C

Type:

relative density

Density:

> 1.108 - < 1.109

Temp.:

20 °C

All measured valued and the corresponding calculation results are given in the following table :

First Determination				Error rel.	Error abs.
Temperature	20.2	°C			1*10^-1
Density of water	0.998203	g/cm^3		2.00%	2*10^-4
Weighing #	m1	m2	m3
Item	Pycn. empty	Pycn. + H2O	Pycn. + test item
Mass in g	42.1391	92.9188	98.5418
Temperature in^oC	20.5	20.2	20.1
Volume of Pycnometer	50.8711	cm3
Density of Test Item	1.1087	g/cm3		0.0022%	2.5*10^-5
Second Determination				Error rel.	Error abs.
Temperature	20.2	°C			1*10^-1
Density of water	0.998203	g/cm3		2.00%	2*10^-4
Weighing #	m1	m2	m3
Item	Pycn. empty	Pycn. + H2O	Pycn. + test item
Mass in g	42.1394	92.9216	98.5332
Temperature in^oC	20.3	20.2	20.0
Volume of Pycnometer	50.8736	cm3
Density of Test Item	1.1085	g/cm3		0.0022%	2.5*10^-5

Mean values of the results are presented in the following table :

Parameter	Value	Unit	Standard Deviation
Volume of Pycnometer	50.87	cm^3	0.0018
Density of Test Item	1.1086	g/cm^3	0.0002
Density of Test Item (SI-Units)	1108.6	kg/m^3	0.2
Relative Density of Test Item	1.1086		0.0002

Conclusions:

The density of the test item was calculated as 1.1086 ± 2.5*10-5 g/cm3 (corresponding to a relative density of 1.1086) at 20.0 ± 0.5°C.

Executive summary:

The relative density of the test item was determined according to the Method 109 of OECD Guidelines for Testing of Chemicals 27 July 1995, Method A3 Relative density of Commission Regulation (EC) No 440 /2008 of 30 May 2008 and GLP. The method used for this determination was the pycnometer method. No deviation from the Guidelines was observed during the test.

The density was calculated from the difference in weight between a full and empty pycnometer and its known volume. The volume of the pycnometer was determined by filling it with a known mass of water. The relative density D₄²⁰of solids or liquids is the ratio of the density of the test item determined at 20°C and the density of water at 4°C.

The density of the test item was calculated as 1.1086 ± 2.5*10^-5g/cm³(corresponding to a relative density of 1.1086) at 20.0 ± 0.5°C, which is the mean of two values. Precision of the value is given as maximal error of a single determination. The standard deviation of the two values is only slightly higher than the maximal error of a single determination.

Description of key information

experimental relative density value : 1.1086 at 20.0 ± 0.5°C.

Key value for chemical safety assessment

Relative density at 20C:

1.109

Additional information

The experimental determination of relative density of the test item was performed by pycnometer method according to the Method 109 of OECD Guidelines for Testing of Chemicals 27 July 1995, Method A3 Relative density of Commission Regulation (EC) No 440 /2008 of 30 May 2008 and GLP. No deviation from the Guidelines was observed during the test.