α,α'-dichloro-p-xylene

Density

Link to relevant study record(s)

Reference

Reference 1

Endpoint:

relative density

Type of information:

experimental study

Adequacy of study:

key study

Study period:

22/03/2018 to 11/04/2018

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Reason / purpose for cross-reference:

reference to same study

Qualifier:

according to guideline

Guideline:

EU Method A.3 (Relative Density)

Deviations:

no

Qualifier:

according to guideline

Guideline:

OECD Guideline 109 (Density of Liquids and Solids)

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:

1.406 other: dimensionless

Temp.:

20 °C

Key result

Type:

density

Density:

1 406 kg/m³

Temp.:

20 °C

Determining the Density of the Immersion Liquid

Mass of Empty Pycnometer (g)	23.91	Volume of Pycnometer (ml)	25.0
Mass water & Pycnometer (g)	48.90	Density of Water (g/cm^3) (ρw,t)	0.998
Mass of IL & Pycnometer (g)	48.04	Mass IL in Pycnometer (g) (m1)	24.13
Calculated Density of IL (g/cm^3)	0.964	Density of IL (kg/cm^3)	964

 

Equation 1 (Calculation for the density of water)

Mass of water / volume of pycnometer = Density of water

 

Equation 2 (Calculation for the density of immersion liquid)

ρ_IL= (m₁/ m_w) xρw,t

 

where:

m₁is the mass of the immersion liquid

m_wis the mass of water

ρw,tis the density of water at temperaturet

 

Calculated value for the density of immersion liquid = 964 kg.m^-3@ 20°C

 

Determining the Density of the Sample

Run Number	1	2
Mass of empty Pycnometer (g)	23.91	23.91
Mass of Samples & Pycnometer (g)	38.81	39.47
Mass of Sample added to empty Pycnometer (g) ms	14.90	15.56
Mass of Sample, Pycnometer & immersion liquid	52.69	52.97
Mass of immersion liquid added (g) m2	13.88	13.50
Calculated Density of Sample (g/cm^3)	1.401	1.411
Density of Sample (kg/cm^3)	1401	1411
Mean Result (kg.m^-3)	1406

 

Equation 3 (Calculation for the density of the sample)

ρS,t= m_sρ_IL/ (m₁– m₂)

 

where:

m_sis the mass, in grams, of the sample;

m₁is the mass, in grams, of immersion liquid required to fill the empty pycnometer;

m₂is the mass, in grams, of immersion liquid added to fill the pycnometer containing the sample;

ρ_ILis the density of the immersion liquid (as determined by equation 2)

Conclusions:

Mean Result:
Relative density (D204) 1.406
Sample density 1406 kg.m-3 @ 20°C

Executive summary:

Test Objective and Information

The test is conducted to determine the relative density of a solid or liquid substance.

The relative density D²⁰₄of solids or liquids is the ratio between the mass of a volume of substance to be examined, determined at 20°C, and the mass of the same volume of water, determined at 4°C. The relative density has no dimension.

For solids or liquids, pycnometers of various shapes and with known volumes may be employed. The density is calculated from the difference in weight between the full and empty pycnometer and its known volume. The tests are run at a constant temperature, preferably 20°C, and at least two measurements are generally performed.

The test is conducted in accordance with the procedure described in EU Regulation (EC) 440/2008, Annex Part A test A3 and OECD Test Guideline 109.

 

Mean Result:

Relative density (D²⁰₄) 1.406

Sample density 1406 kg.m^-3@ 20°C

Reference 2

Endpoint:

relative density

Type of information:

(Q)SAR

Adequacy of study:

supporting study

Study period:

Not yet available

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

comparable to guideline study with acceptable restrictions

Remarks:

QSAR Prediction

Principles of method if other than guideline:

Data is QSAR data.

GLP compliance:

yes (incl. QA statement)

Type of method:

other:

Remarks:

QSAR prediction

Key result

Type:

relative density

Density:

1.2 g/cm³

Remarks on result:

other: QSAR prediction

Executive summary:

The density has  been  assessed  by  QSAR using model ACD/Labs. The density has been predicted to be 1.2 g/cm3.

Description of key information

Mean Result:

Relative density (D²⁰₄) 1.406

Sample density 1406 kg.m^-3@ 20°C

Key value for chemical safety assessment

Relative density at 20C:

1.406

Additional information

The relative density D²⁰₄ of solids or liquids is the ratio between the mass of a volume of substance to be examined, determined at 20°C, and the mass of the same volume of water, determined at 4°C. The relative density has no dimension.

For solids or liquids, pycnometers of various shapes and with known volumes may be employed. The density is calculated from the difference in weight between the full and empty pycnometer and its known volume. The tests are run at a constant temperature, preferably 20°C, and at least two measurements are generally performed.

The test is conducted in accordance with the procedure described in EU Regulation (EC) 440/2008, Annex Part A test A3 and OECD Test Guideline 109.

 

Mean Result:

Relative density (D²⁰₄) 1.406

Sample density 1406 kg.m^-3@ 20°C