Registration Dossier

Physical & Chemical properties

Density

Currently viewing:

Administrative data

Link to relevant study record(s)

Reference
Endpoint:
relative density
Type of information:
experimental study
Adequacy of study:
key study
Study period:
February 27, 2012.
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: Well conducted study, according to OECD guideline, certificate of analysis included in the report.
Qualifier:
according to
Guideline:
OECD Guideline 109 (Density of Liquids and Solids)
Version / remarks:
27th July 1995
Deviations:
yes
Remarks:
special care is taken to avoid air in the sample, because the substance is viscous.
Principles of method if other than guideline:
Deviation of the guidelines: special care is taken to avoid air in the sample, because the substance is viscous.
GLP compliance:
no
Type of method:
pycnometer method
Type:
relative density
Density:
1.212
Temp.:
20 °C

The weight of the empty pycnometer is 165.678g

Measurement

Weight

g

 

Weight

g/100ml

Density

g/ml

1

286,804

121,126

1.211

2

286,759

121,081

1.211

3

287,079

121,401

1.214

Average

 

 

1.212

St .Dev.

 

 

0.00173

RSD (%)

 

 

0.143

 

The accuracy of the volume of the pycnometer was checked just after this determination with demineralized water.

 

Measurement

Weight

g

 

Weight

g/100ml

Density

g/ml

1

265.342

99,664

0.997

2

265.413

99,735

0.997

The density of water at 200C is 1.000 g/ml. The deviation of 0.003% of the calibration data is within the limits of determination. So the pycnometer has the correct volume.

Conclusions:
The relative density of Paste of 48.7% Bis(2,4-dichlorobenzoyl) peroxide in 50.7% polydimethylsiloxane is 1.212.
Executive summary:

The relative density of Di(2,4-dichlorobenzoyl) peroxide, paste, 50% in silicone oil was determined in triplicate according to OECD Guideline 109, and in 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 Paste of 48.7% Bis(2,4-dichlorobenzoyl) peroxide in 50.7% polydimethylsiloxaneis 1.212.

Description of key information

The relative density of Paste of 48.7% Bis(2,4-dichlorobenzoyl) peroxide in 50.7%  polydimethylsiloxane is 1.212.

Key value for chemical safety assessment

Relative density at 20C:
1.212

Additional information