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Reference
Endpoint:
relative density
Type of information:
experimental study
Adequacy of study:
key study
Study period:
September 05, 2011 - November 08, 2011
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
guideline study with acceptable restrictions
Remarks:
Study performed according to international guidelines giving scientifically valid results but not under GLP
Reason / purpose:
reference to same study
Reason / purpose:
reference to other study
Qualifier:
according to
Guideline:
EU Method A.3 (Relative Density)
Version / remarks:
(May 2008)
Deviations:
not specified
Qualifier:
according to
Guideline:
OECD Guideline 109 (Density of Liquids and Solids)
Version / remarks:
(July 1995)
Deviations:
not specified
Principles of method if other than guideline:
The oscillating densitimeter method was employed to determine the density of the sample. A mechanical oscillator constructed in the form of a U-tube is vibrated at the resonance frequency of the oscillator which depends on its mass. The method is applicable to liquids with a dynamic viscosity below 5 Pa.s.
The relative density is the quotient of the mass of a defined volume of test item, measured at 20°C, and the mass of the same volume of water determined at 4°C. Relative density 20°C/4°C of the test item = density of the test item at 20°C [kg/m3]/999.975 [kg/m3] (density of water at 4°C)
Three measurements were performed at 20°C+/-0.5°C.
GLP compliance:
no
Type of method:
oscillating densitimeter
Type:
relative density
Density:
ca. 0.858 g/L
Temp.:
20 °C
Remarks on result:
other: Relative density D20°C/4°C. Results obtained from three measurements of density at 20°C+/-0.5°C

Available Data for Reference Items:

Density of water at 4°C : 999.975kg/m3 (CRC Handbook of Chemistry and Physics, 89th Ed, 2008 -2009)

Density of water at 19.5°C : 998.3kg/m3 (CRC Handbook of Chemistry and Physics, 89th Ed, 2008 -2009)

Density of 2 -propanol (CAS No.67 -63 -0) at 25°C : 780.9kg/m3 (CRC Handbook of Chemistry and Physics, 89th Ed, 2008 -2009)

Relative density of 2 -propanol (CAS No.67 -63 -0): 0.785(The Merck Index, 14th Ed, 2006)

Density of n-butyl acetate (CAS No.123 -86 -4) at 20°C : 882.5kg/m3(CRC Handbook of Chemistry and Physics, 89th Ed, 2008 -2009)

Density of blend S6 batch 292101 (mixture of CAS No.8042 -47 -5, 64471 -86 -2 and 64742 -56 -9) at 20°C : 822.5kg/m3(certificate of calibration provided)

 

Measured densities of the test item and reference items (g/mL):

Substance or mixture  Assay No.1   Assay No.2  Assay No.3 

(-)-ALPHA-PINENE

 0.858  0.858  0.858

2 -propanol (CAS No.67 -63 -0)

 0.785  nd  nd

n-butyl acetate (CAS No.123 -86 -4)

 0.881  nd  nd

Blend S6 batch 292101 (mixture of CAS No.8042 -47 -5, 64471 -86 -2 and 64742 -56 -9)

 0.822  nd  nd

nd : not determined

According to the results obtained with the reference items, the test has to be considered as valid.

Relative Density Results (20°C/4°C):

 Assay No.  Density [kg/m3] at 20°C  Relative density
 1  858  0.858
 2  858  0.858
 3  858  0.858

Average density at 20°C +/- 0.5°C of the test item : 858kg/m3.

Conclusions:
The relative density of (-)-alpha-pinene was determined to be 0.858.
Executive summary:

The test to determine the relative density of (-)-alpha-pinene was conducted in compliance with OECD guideline 109 and the EU method A.3. Three measurements with a oscillating densitimeter gave a value of 0.858 for the relative density of (-)-alpha-pinene.

The test was performed in compliance with OECD guideline 109 and gives scientifically valid results. As no observations were made which might cause doubts concerning the validity of the study outcome, the results of the study were considered valid.

Description of key information

The relative density of (-)-alpha-pinene was determined to be 0.858.

Key value for chemical safety assessment

Relative density at 20C:
0.858

Additional information

The relative density of (-)-alpha-pinene at 20°C was determined in a study performed according to OECD Guideline 109 and EU method A3 using an oscillating densimeter. The value was considered with a reliability of 2 (reliable with restrictions) because the result is scientifically acceptable but not obtained under GLP and some details were lacking in the report.

The relative density obtained is valid for key value and supported by consistent experimental data on alpha-pinene multiconstituent.