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Density

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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:
OECD Guideline 109 (Density of Liquids and Solids)
Deviations:
no
Qualifier:
according to
Guideline:
EU Method A.3 (Relative Density)
Deviations:
no
GLP compliance:
yes (incl. certificate)
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/cm3

 

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 inoC

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 inoC

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

cm3

0.0018

Density of Test Item

1.1086

g/cm3

0.0002

Density of Test Item (SI-Units)

1108.6

kg/m3

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.