Petroleum resins

Density

Link to relevant study record(s)

Reference

Endpoint:

relative density

Type of information:

experimental study

Adequacy of study:

key study

Study period:

20. Jun. 2018 to 25. Jun. 2018

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:

OECD Guidelines for the Testing of Chemicals, Method No. 109, adopted 02. Oct. 2012: “Density of Liquids and Solids“

Deviations:

no

Qualifier:

according to guideline

Guideline:

EU Method A.3 (Relative Density)

Version / remarks:

Commission Regulation (EC) No 440/2008 of 30. May 2008, published on 31. May 2008, Method A.3: “Relative Density”

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Type of method:

pycnometer method

Specific details on test material used for the study:

No further details specified in the study report.

Key result

Type:

relative density

Density:

0.908 g/cm³

Temp.:

20 °C

Findings

Pre-test for viscosity

The test item was flowable but it was not possible to inject the test item with a one way syringe.

 

Measurement

All measured values 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	36.7420	61.6072	59.4274
Temperature in^°C	20.0	20.4	20.2
Second Determination
Weighing #	m1	m2	m3
Item	Pycn. empty	Pycn. +H2O	Pycn. + test item
Mass in g	36.7419	61.6527	59.3410
Temperature in^°C	20.0	20.0	20.0

Pycn. = Pycnometer

 

Calculation of Results

Equations

Density of Test Item

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

ρ = [(m₃– m₁) / (m₂– m₁)] * ρH₂O

 

with

ρ = 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

ρH₂O = density of water at test temperature (0.9982 g*cm^-3at 20.0 °C)

 

The relative density of the test item has the same number value, but no unit.

 

Calculation of Error

The error of the determination method can be calculated from:

 

∆ρ = [(2*∆m*100%) / m₃–m₁)] + [(2*∆m*100%) / m₂– m₁)]

 

with

∆ρ = relative error of the measured density

∆m = absolute error of single weighing (0.0003 g)

 

Calculation of Relative Standard Deviation

The RSD was calculated as followed:

 

RSD = (sd*100) / density mean

 

RSD = Relative Standard Deviation in %

sd = Standard Deviation in g*cm^-3

  

The following values were calculated.

Calculated Values

First Determination			Error rel.	Error abs.
Temperature	20,4	°C		0.1
Density of water	0.998098	g/cm^3	2.00%	0.0002
Volume of Pycnometer	24.9126	cm^3
Density of Test Item	0.9106	g/cm^3	0.0051%	0.0000
Second Determination			Error rel.	Error abs.
Temperature	20.0	°C		0.1
Density of water	0.998203	g/cm^3	2.00%	0.0002
Volume of Pycnometer	24.9556	cm^3
Density of Test Item	0.9056	g/cm^3	0.0051%	0.0000

rel. = relative; abs. = absolute

 

Presentation of Results

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/cm^3	Error of Determ. in g/cm^3
1	0.9106	0.0000
2	0.9056	0.0000

 

Results – Mean Values

Parameter	Value	Unit	Standard Deviation	Relative Standard Deviation
Volume of Pycnometer	24.93	cm^3	0.0304	0.12%
Density of Test Item	0.9081	g/cm^3	0.0036	0.39%
Density of Test Item	908.1	kg/m^3	3.6	0.39%
Relative Density of Test Item	0.9081		0.0036	0.39%

 

Conclusions:

The density of the test item Petroleum Resins (Kendex 0897) was calculated as 0.9081 ± 0.0036 g/cm3 at 20 ± 0.4 °C. This value is the mean of two independent determinations ± the standard deviation. Standard deviation shows good correlation of the two determinations.

Executive summary:

Determination of the density of Petroleum Resins (Kendex 0897) according to OECD 109 resp. EU A.3

 

Findings and Results:

Using the pycnometer method, a density of 0.9081 ± 0.0036 g/cm3 at 20 ± 0.4 °C was measured. This value is the mean of two independent determinations ± the standard deviation. Standard deviation shows good correlation of the two determinations.

Description of key information

Using the pycnometer method, a density of 0.9081 ± 0.0036 g/cm3 at 20 ± 0.4 °C was measured.

Key value for chemical safety assessment

Relative density at 20C:

0.908

Additional information

Using the pycnometer method, a density of 0.9081 ± 0.0036 g/cm3 at 20 ± 0.4 °C was measured. This value is the mean of two independent determinations ± the standard deviation. Standard deviation shows good correlation of the two determinations.