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Density

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Reference
Endpoint:
density, other
Remarks:
density
Type of information:
experimental study
Adequacy of study:
key study
Study period:
From 11 to 21 June 2012
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
OECD Guideline 109 (Density of Liquids and Solids)
Deviations:
not specified
Qualifier:
according to guideline
Guideline:
EU Method A.3 (Relative Density)
Deviations:
not specified
GLP compliance:
yes (incl. QA statement)
Type of method:
pycnometer method
Key result
Type:
density
Density:
ca. 1.464 g/cm³
Temp.:
20 °C
Key result
Type:
density
Density:
ca. 1.459 g/cm³
Temp.:
20 °C

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:

Results of Single Determinations

Determination

Density in g/cm3

Error of Determ. in g/cm3

1

1.4643

0.0009

2

1.4590

0.0010

Results – Mean Values

Parameter

Value

Unit

Standard Deviation

Relative Standard Deviation

Volume of Pycnometer

24.92

cm3

0.0042

0.02%

Density of Test Item

1.4617

g/cm3

0.0038

0.26%

Density of Test Item

1461.7

kg/m3

3.8

0.26%

Relative Density of Test Item

1.4617

 

0.0038

0.26%

The density was measured as 1.4617 ± 0.0010 g/cm3at 20 ± 0.5 °C

 This value is the mean of two independent determinations with the maximum error of a single determination.

Standard deviation was 0.0038 g/cm3, showing good correlation of the two determinations.

Conclusions:
The density of the test item zinc methacrylate was calculated as 1.4617 ± 0.0010 g/cm3 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.

Executive summary:

This study was performed in order to determine the density of zinc methacrylate by pycnometer method according to the OECD 109 and EU method A.3. The density is calculated from the difference in weight between a full and empty pycnometer and its known volume. The density of the test item was calculated as 1.4617 ± 0.0010 g/cm3 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. One deviation was occured during the study: in the preparation of the replacement liquid the test item was shaken in petroleum for 28 instead of 24 h. The deviation was not deviation from the guideline and assessed as uncritical (Henke, 2013).

Description of key information

The density of the test item zinc methacrylate was calculated as 1.4617 ± 0.0010 g/cm3 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.

Key value for chemical safety assessment

Relative density at 20C:
1.462

Additional information

Key study was performed in order to determine the density of zinc methacrylate by pycnometer method according to the OECD 109 and EU method A.9.The density is calculated from the difference in weight between a full and empty pycnometer and its known volume. The density of the test item was calculated as 1.4617 ± 0.0010 g/cm3at 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 (Henke, 2013).