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Density

Link to relevant study record(s)

Reference

Endpoint:

relative density

Type of information:

experimental study

Adequacy of study:

key study

Study period:

2019-2020

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)

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 15-16/11/2017, Signed on 15/05/2018

Type of method:

pycnometer method

Key result

Type:

relative density

Density:

1.034 other: relative density

Temp.:

20 °C

Findings

Pre-test for viscosity

The test item was flowable and it was possible to inject the test item with a one way syringe.

Measurement

All measured values and the corresponding calculation results are given in the following table:

Measured Values

First Determination
Weighing #	m1	m2	m3
Item	Pycn. empty	Pycn. +H2O	Pycn. + test item
Mass in g	31.1287	41.0461	41.4002
Temperature in^°C	19.8	19.8	20.2
Second Determination
Weighing #	m1	m2	m3
Item	Pycn. empty	Pycn. +H2O	Pycn. + test item
Mass in g	31.1288	41.0457	41.3999
Temperature in^°C	20.0	20.0	20.2

Pycn. = Pycnometer

Calculated Values

First Determination			Error rel.	Error abs.
Temperature	19.8	°C		0.1
Density of water	0.9982478	g/cm^3	2.00%	0.0002
Volume of Pycnometer	9.9348	cm^3
Density of Test Item	1.0339	g/cm^3	0.0119%	0.0001
Second Determination			Error rel.	Error abs.
Temperature	20.0	°C		0.1
Density of water	0.9982067	g/cm^3	2.00%	0.0002
Volume of Pycnometer	9.9347	cm^3
Density of Test Item	1.0339	g/cm^3	0.0119%	0.0001

rel. = relative; abs. = absolute

For further information about the calculation please see the laboratory report.

Conclusions:

The density of the test item was calculated as 1.0339 ± 0.0001 g/cm3 at 20.0 ± 0.2°C.

Executive summary:

An experimental study, conducted in accordance with conditions recommended in OECD guideline and under GLP was performed. The density of the test item was calculated as 1.0339 ± 0.0001 g/cm³at 20.0 ± 0.2°C, which is the mean of two values. Precision of the value is given as maximal error of determination.

Standard deviation shows very good correlation of the two determinations.

Therefore, the study is considered valid.

Description of key information

The density of the test item was calculated as 1.0339 ± 0.0001 g/cm³at 20.0 ± 0.2°C, which is the mean of two values.

Key value for chemical safety assessment

Relative density at 20C:

1.034

Additional information

An experimental study, conducted in accordance with conditions recommended in OECD guideline and under GLP was performed.The density of the test item was calculated as 1.0339 ± 0.0001 g/cm³at 20.0 ± 0.2°C, which is the mean of two values. Precision of the value is given as maximal error of determination.

Standard deviation shows very good correlation of the two determinations.

Therefore, the study is considered valid and as a key study.