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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:
May 22 to June 04, 2014
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
Guideline:
OECD Guideline 109 (Density of Liquids and Solids)
Version / remarks:
adopted 02 October 2012
Deviations:
no
Qualifier:
according to guideline
Guideline:
EU Method A.3 (Relative Density)
Version / remarks:
Regulation (EC) No 440/2008 of 30 May 2008
Deviations:
no
Principles of method if other than guideline:
Not applicable
GLP compliance:
yes (incl. QA statement)
Remarks:
inspected on 29 and 30 November 2010 / signed on 11 April 2011
Type of method:
pycnometer method
Key result
Type:
density
Density:
1.057 g/cm³
Temp.:
20 °C
Key result
Type:
relative density
Density:
1.057 other: unitless
Temp.:
20 °C

Table 4.4/1: Measured Values

 

First Determination

Error rel.

Error abs.

Temperature

19.8

°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

36.9448

61.8109

61.8032

 41.3295

 62.0374

Temperature in °C

19.8

19.8

20.2

19.8

20.0

Volume of Pycnometer

24.9109

cm3

 

 

 

Density of Replacement Liquid

0.9979

 g/cm3

 

Density of Test Item

1.0542

g/cm3

 

0.0474%

0.0005

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

36.9447

61.8039

61.7974

 42.5257

62.1204

Temperature in °C

20.0

20.0

19.8

20.0

19.8

Volume of Pycnometer

24.9040

cm3

 

 

 

Density of Replacement Liquid

0.9979

 g/cm3

 

Density of Test Item

1.0592

g/cm3

 

0.0384%

0.0004

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

1.0542

0.0005

2

1.0592

0.0004

 

Table 4.4/3 Results – Mean Values

Parameter

Value

Unit

Standard

Deviation

Relative Standard

Deviation

Volume of Pycnometer

24.91

cm3

0.0049

0.02%

Density of Test Item

1.0567

g/ cm3

0.0036

0.34%

Density of Test Item

1056.7

Kg/m3

3.6

0.34%

Relative Density of Test Item

1.0567

 

0.0036

0.34%

 

The density of the test item was calculated as 1.0567 ± 0.0005 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 1.0567 ± 0.0005 g/cm3 at 20.0 ± 0.2 °C and the relative density is determined as D20/4 = 1.0567 ± 0.0005
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 4°C.

Mean density: 1.0567± 0.0005 g/cm3at 20.0 ± 0.2 °C

Mean relative density (D20/4) : 1.0567

Description of key information

The density of the test item was calculated as 1.0567 ± 0.0005 g/cm3 at 20.0 ± 0.2 °C  and the relative density is determined as D20/4 = 1.0567

Key value for chemical safety assessment

Relative density at 20C:
1.057

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.

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