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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:
28-30 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. Test substance is adequately characterised. Therefore full validation applies.
Reason / purpose for cross-reference:
reference to same study
Reason / purpose for cross-reference:
reference to other study
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 13 and 14 October 2014/ Signed on 8 April 2015
Type of method:
buoyancy method - hydrostatic balance
Key result
Type:
relative density
Density:
1.023 other: no dimension
Temp.:
20 °C

Density of the replacement liquid:

All measured values are given in the following table:

First Determination

 

 

 

Weighing #

m1

m2

m3

Item

Pycn. empty

Pycn.+ H2O

Pycn. + repl.liq.

Mass in g

36.7395

61.6018

61.6002

Temperature in °C

20.0

19.6

20.0

Second Determination

 

 

 

Weighing #

m1

m2

m3

Item

Pycn. empty

Pycn.+ H2O

Pycn. + repl.liq.

Mass in g

36.7394

61.6023

61.6005

Temperature in °C

20.2

19.8

20.0

Density of the test item:

All measured values are given in the following table:

First Determination

Weight A

Weight B

Weighing #

m1 (in air)

m2 ( in replacement liquid)

Mass in g

4.5999

0.1073

Temperature in °C

19.7

19.7

Second Determination

Weight A

Weight B

Weighing #

m1 (in air)

m2 ( in replacement liquid)

Mass in g

6.6089

0.1647

Temperature in °C

19.7

19.7

Results - Mean values:

Parameter

Value

Unit

Standard Deviation

Relative Standard Deviation

Volume of Pycnometer

24.91

cm3

0.0022

0.01%

Density of Replacement liquid

0.9982

g/cm3

0.0001

0.01%

First Determination

 

 

Density of test item

1.0220

g/cm3

Second Determination

 

 

Density of test item

1.0237

g/cm3

Value of the mean

1.0228

g/cm3

Standard Deviation

0.0012

g/cm3

Relative Standard Deviation

0.12

%

Conclusions:
The density of the test item was calculated as 1.0228 ± 0.0012 g/cm3 at 20 ± 0.3 °C, which is the mean of two values ± the standard deviation.
Executive summary:

The study was performed in order to determine the density of test item according to OECD 109, resp. EU A.3 guideline, using a hydrostatic balance.

The density of test item was determined to be 1.0228 ± 0.0012 g/cm3 at 20 ± 0.3 °C.

Description of key information

The density of test item was determined to be 1.0228 ± 0.0012 g/cm3 at 20±0.3 °C.

This value is the mean of two independent determinations.

Key value for chemical safety assessment

Relative density at 20C:
1.023

Additional information

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