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Physical & Chemical properties

Density

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Reference
Endpoint:
relative density
Type of information:
experimental study
Adequacy of study:
key study
Study period:
10 - 21 August 2017
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Justification for type of information:
The study was conducted according to an internationally recognised method, and under GLP. The substance is considered to be adequately characterised. Therefore full validation applies.
Qualifier:
according to
Guideline:
OECD Guideline 109 (Density of Liquids and Solids)
Version / remarks:
2012
Deviations:
no
Qualifier:
according to
Guideline:
EU Method A.3 (Relative Density)
Version / remarks:
2008
Deviations:
no
Principles of method if other than guideline:
Not applicable
GLP compliance:
yes (incl. certificate)
Remarks:
inspected on 13 and 14 October 2014 / signed on 08 April 2015
Type of method:
pycnometer method
Key result
Type:
relative density
Density:
1.128 other: unitless
Temp.:
20 °C
Key result
Type:
density
Density:
1.128 g/cm³
Temp.:
20 °C

Table 4.4/1: Measured Values

 

First Determination

Error rel.

Error abs.

Temperature

20.2

°C

 

 

0.1

Density of water

0.998203

g/cm3

 

2.00%

0.0002

Weighing #

m1

m2

m3

m4

m5

Item

Pycn. empty

Pycn. + H2O

Pycn. +

repl.liq.

Pycn. + test

item

Pycn. + test

item + repl. liq.

Mass in g

38.0032

88.3699

88.3690

 46.7144

89.3760

Temperature in °C

20.2

20.0

20.0

20.2

20.2

Volume of Pycnometer

50.4574

cm3

 

 

 

Density of Replacement Liquid

0.9982

 g/cm3

 

Error rel.

Error abs.

Density of Test Item

1.1287

g/cm3

 

0.0248%

0.0003

Second Determination

Error rel.

Error abs.

Temperature

20.0

°C

 

 

0.1

Density of water

0.998203

g/cm3

 

2.00%

0.0002

Weighing #

m1

m2

m3

m4

m5

Item

Pycn. empty

Pycn. + H2O

Pycn. +

repl.liq.

Pycn. + test

item

Pycn. + test

item + repl. liq.

Mass in g

38.0038

88.3813

88.3816

45.0506

89.1862

Temperature in °C

20.0

20.2

20.0

20.0

20.2

Volume of Pycnometer

50.4682

cm3

 

 

 

Density of Replacement Liquid

0.9982

g/cm3

 

Error rel.

Error abs.

Density of Test Item

1.1269

g/cm3

 

0.0301%

0.0003

Results of the single determinations with the respective error as well as the mean value and its standard deviation are presented in the following tables:

Table 4.4/2: Results of Single Determinations

 

Determination

Density in g/cm3

Error of Determ. in g/cm3

1

1.1287

0.0003

2

1.1269

0.0003

 

Table 4.4/3 Results – Mean Values

 

Parameter

Value

Unit

Standard

Deviation

Relative Standard

Deviation

Volume of Pycnometer

50.46

cm3

0.0077

0.02%

Density of Test Item

1.1278

g/ cm3

0.0013

0.11%

Density of Test Item

1127.8

Kg/m3

1.3

0.11%

Relative Density of Test Item (D20/4)

1.1278

 

0.0013

0.11%

The relative density of the test item has the same number value, but no unit, assuming that relative density is given as the ratio of test item density to density of water at 4°C, having a standard density of 0.999975 g/cm3 (source: CRC Handbook of Chemistry and Physics - 90th edition / Section 6 - Fluid properties - p.6 -7).

The density of the test item was calculated as 1.1278 ± 0.0003 g/cm3 at 20.0 ± 0.2 °C, which is the mean of two independent determinations ± the standard deviation. Standard deviation shows good correlation of the two determinations. Therefore, the study is considered valid.

Conclusions:
The density of the test substance was calculated as 1.1278 ± 0.0004 g/cm3 at 20.0 ± 0.2 °C and the relative density is determined as D20/4 = 1.1278
Denser than water
Executive summary:

The density of the test substance was measured under GLP according OECD 109 / EU A3 guideline, using the pycnometer method.

Two determinations were performed and the mean value was retained.

This result was then converted to relative density towards water at 20 °C.

Mean density: 1.1278 g/cm3at 20.0 ± 0.2 °C

Mean relative density (D20/4) : 1.1278

Description of key information

The density of the test item was calculated as 1.1278 ± 0.0003 g/cm3 at 20.0 ± 0.2 °C and the relative density is determiend as D20/4 = 1.1278

Key value for chemical safety assessment

Relative density at 20C:
1.128

Additional information

A fully reliable experimental study, conducted under GLP according to OECD 109 /EU A3 guideline, using pycnometer method, is available. It is considered as a key study, and the result is retained as key data.