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Density

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Reference
Endpoint:
relative density
Type of information:
experimental study
Adequacy of study:
key study
Study period:
October 3, 2011
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: Well conducted and documented study under Internal management system, according to OECD and EU guidelines, certificate of analysis is included in the report.
Qualifier:
according to
Guideline:
EU Method A.3 (Relative Density)
Version / remarks:
No 440/2008, May 31, 2008
Deviations:
no
Qualifier:
according to
Guideline:
OECD Guideline 109 (Density of Liquids and Solids)
Version / remarks:
Adopted July 27, 1995
Deviations:
no
GLP compliance:
no
Remarks:
Internal management system
Type of method:
oscillating densitimeter
Type:
relative density
Density:
1.051
Temp.:
20 °C
Remarks on result:
other: The standard deviation is ± 0.0002

Calibration and validity verification

The calibration was carried out on August 16, 2010.

The measured density of the calibration liquids at 20°C is mentioned in table 1. Also the deviation from the literature values is mentioned. The mean value for the calibration liquids agrees within ± 0.002 g/cm3(accuracy range) with the literature values.

 Table : measured density of calibration liquids at 20°C

Calibration liquid

Measurement

Density

[g/cm3]

Mean density value [g/cm3]

Deviation from literature value [g/cm3]

Demineralized water

1

0.9982

 

0.9982

 

0.0000

2

0.9982

3

0.9982

Ethanol

1

0.7897

 

0.7896

 

0.0003

2

0.7896

3

0.7896

4

0.7896

Dichloro-methane

1

1.3244

 

1.3248

 

0.0018

2

1.3251

3

1.3252

4

1.3246

 

The validity of the method was verified prior to the measurement with the test substance using demineralized water.

Measured density of water at 20°C:

measurement 1: 0.9982 g/cm3

measurement 2: 0.9982 g/cm3

measurement 3: 0.9982 g/cm3

These values agree within ± 0.0005 g/cm3with the literature value for demineralized water.

Density test substance

Measured density of the test substance at 20°C:

measurement 1: 1.0512 g/cm3

measurement 2: 1.0513 g/cm3

measurement 3: 1.0516 g/cm3

 

Mean value at 20°C is 1.0514 g/cm3. The standard deviation is ± 0.0002 g/cm3.

The relative density (D420), is the ratio of the true density of a material at a temperature of 20ºC and the density of water at a temperature of 4ºC (density = 0.999975g/cm3). The relative density has no dimension.

The relative density (D420is 1.0514.

Conclusions:
The relative density of 2,4-Pentanedione, peroxide 30% in solvent mixture at 20°C is 1.0514.

Executive summary:

The relative density of 2,4-Pentanedione, peroxide, 30% in solvent mixture was determined in triplicate according to EC Regulation No 440/2008, Guideline A.3 and according to OECD Guideline 109, andin accordance with European Chemicals Agency (ECHA), Guidance on information requirements and chemical safety assessment, Chapter R.7a, Endpoint specific guidance, May 2008.

The relative density of 2,4-Pentanedione, peroxide (CAS# 37187-22-7), 30% in solvent mixture at 20°C is 1.0514 (± 0.0002).

Description of key information

The  relative density of  2,4-Pentanedione, peroxide 30% in solvent mixture at 20°C is 1.0514.

Key value for chemical safety assessment

Relative density at 20C:
1.051

Additional information