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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:
06-10 November 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
Guideline:
OECD Guideline 109 (Density of Liquids and Solids)
Version / remarks:
2012
Deviations:
no
Qualifier:
according to guideline
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. QA statement)
Remarks:
inspected on 15-16 November 2017 / signed on 15 May 2018
Type of method:
pycnometer method
Remarks:
with replacement liquid
Key result
Type:
density
Density:
1.045 g/cm³
Temp.:
20 °C
Remarks on result:
other:
Remarks:
mean of two independent determinations
Key result
Type:
relative density
Density:
1.045 other: unitless
Temp.:
20 °C
Remarks on result:
other:
Remarks:
mean of two independent determinations

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.liquid

Pycn. + test item

Pycn. + test item + repl. liquid

Mass in g

36.7398

61.6067

61.6033

44.2492

61.9455

Temperature in °C

20.2

20.2

19.8

20.2

20.2

Volume of Pycnometer

24.9117

cm3

 

 

 

Density of Replacement liquid

0.9981

 g/cm3

 

Error rel.

Error abs.

Density of Test Item

1.0457

g/cm3

 

0.0296

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.liquid

Pycn. + test item

Pycn. + test item + repl. liquid

Mass in g

36.7411

61.6033

61.5994

45.9604

62.0096

Temperature in °C

20.4

20.0

19.8

20.0

20.0

Volume of Pycnometer

24.9070

cm3

 

 

 

Density of Replacement liquid

0.9980

 g/cm3

 

Error rel.

Error abs.

Density of Test Item

1.0445

g/cm3

 

0.0250%

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

1.0457

0.0003

2

1.0445

0.0003

 

Table 4.4/3 Results – Mean Values

 

Parameter

Value

Unit

Standard

Deviation

Relative Standard

Deviation

Volume of Pycnometer

24.91

cm3

0.0033

0.01%

Density of Test Item

1.0451

g/ cm3

0.0008

0.08%

Density of Test Item

1045.1

kg/m3

0.8

0.08%

Relative Density of Test Item (D20/4)

1.0451

 

0.0008

0.08%

The density of the test item was calculated as 1.0451 ± 0.0003 g/cm3 at 20.0 ± 0.4 °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 measured as 1.0451 ± 0.0003 g/cm3 at 20.0 ± 0.4 °C and the relative density is determined as D20/4 = 1.0451
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 with a replacement liquid.

Two determinations were performed and the mean value was retained.

This result was then converted to relative density.

Mean density: 1.0451 g/cm3at 20.0 ± 0.4 °C

Mean relative density (D20/4) : 1.0451

Description of key information

The density of the test item was measured as 1.0451 ± 0.0003 g/cm3 at 20.0 ± 0.4 °C and the relative density is determined as D20/4 = 1.0451

Key value for chemical safety assessment

Relative density at 20C:
1.045

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.