Tagetes minuta, ext.

Density

Link to relevant study record(s)

Reference

Endpoint:

density, other

Type of information:

experimental study

Adequacy of study:

key study

Study period:

04 May 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 08 April 2015

Type of method:

pycnometer method

Key result

Type:

density

Density:

0.861 g/cm³

Temp.:

20 °C

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

Table8-a        Measured values

 

First Determination
Weighing#	m1	m2	m3
Item	Pycn.empty	Pycn.+ H2O	Pycn.+ test item
Mass in g	36.7407	61.6019	58.1986
Temperature in °C	20.0	20.0	20.2
SecondDetermination
Weighing#	m1	m2	m3
Item	Pycn.empty	Pycn.+ H2O	Pycn.+ test item
Mass in g	36.7405	61.6026	58.1605
Temperature in °C	20.2	20.2	20.2

 

Pycn.=Pycnometer

The density of the test item was calculated using the following equation:

r= (m3 -m1)/(m2 -m1)*rH2O

 

with

r                            =               density in g/cm³
m₁                         =               mass of empty pycnometer in g
m₂                         =               mass of pycnometer with water in g
m₃                         =               mass of pycnometer with test item in g

r_H2O                      =               density of water at test temperature(0.9982 g*cm^-3at 20.0°C)

Results are presented in the following table:

Determination	Density in g/cm^3	Error of Determ. in g/cm^3
1	0.8616	0.0000
2	0.8600	0.0000

Conclusions:

Using the pycnometer method, a density of 0.8608 ± 0.0011 g/cm3 at 20 ± 0.2 °C (860.8 ± 1.1 kg/m3 at 20 ± 0.2 °C) was measured. This value is the mean of two independent determinations ± the standard deviation. Standard deviation shows good correlation of the two determinations.

Executive summary:

The study was performed in order to determine the density of the test substance according to OECD 109 and EU Method A3, using the pycnometer method.

A density of 0.8608 ± 0.0011 g/cm3 at 20 ± 0.2 °C (860.8 ± 1.1 kg/m3 at 20 ± 0.2 °C) was measured.

Description of key information

A density of 0.8608 ± 0.0011 g/cm3 at 20 ± 0.2 °C (860.8 ± 1.1 kg/m3 at 20 ± 0.2 °C) was measured.

Key value for chemical safety assessment

Relative density at 20C:

0.861

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.