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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:
2011-05-26
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
guideline study with acceptable restrictions
Qualifier:
equivalent or similar to guideline
Guideline:
EU Method A.3 (Relative Density)
Deviations:
not specified
Principles of method if other than guideline:
The density of the liquid is measured by a pycnometer made of glass with a close-fitting ground glass stopper with a capillary tube through it, so that air bubbles may escape from the apparatus. The device enables a liquid´s density to be measured accurately by reference to an appropriate working fluid using an analytical balance. The flask is weighed empty and full of a liquid whose specific gravity is desired, the specific gravity of the liquid can be then calculated.
GLP compliance:
no
Type of method:
pycnometer method
Key result
Type:
density
Density:
0.884 g/cm³
Temp.:
20 °C
Key result
Type:
relative density
Density:
0.884 other: dimensionless
Temp.:
20 °C
Conclusions:
The density of 1,1-bis(tert-butylperoxy)cyclohexane was determined to be 0.861 g/cm³ at 20 °C.
Executive summary:

A study was conducted in equivalence to Regulation (EC) No 440/2008 method A.3. The density of the 1,1-bis(tert-butylperoxy)cyclohexane 75 % in isododecane was measured by a 25 mL pycnometer at temperature of 20 ± 0.2 °C. The calculated result obtained indicated of a density of 0.861 g/cm³ for 1,1-Di-(tert-butylperoxy) cyclohexan.

Description of key information

Using the pycnometer method, the density of 1,1-Di-(tert-butylperoxy) cyclohexan 80 % in isododecane was determined to be 0.884 g/cm³ at 20 ± 0.2 °C.

Key value for chemical safety assessment

Relative density at 20C:
0.884

Additional information

The density of the test substance 1,1-Di-(tert-butylperoxy) cyclohexan 80 % in isododecane was measured by a 25 mL pycnometer at temperature of 20 ± 0.2 °C. The calculated result obtained indicated of a density of 0.884 g/cm³.