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Endpoint:
relative density
Type of information:
experimental study
Adequacy of study:
key study
Study period:
August 2010
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: Study performed according to international guidelines but not under GLP and with some lack of details (no report number, criteria of validity not indicated).
Reason / purpose:
reference to same study
Reason / purpose:
reference to other study
Qualifier:
according to
Guideline:
OECD Guideline 109 (Density of Liquids and Solids)
Deviations:
not specified
Qualifier:
according to
Guideline:
EU Method A.3 (Relative Density)
Deviations:
not specified
GLP compliance:
no
Type of method:
oscillating densitimeter
Key result
Type:
relative density
Density:
0.858 g/L
Temp.:
20 °C
Remarks on result:
other: relative density at 20 °C in reference with water at 4 °C

The obtained value is the mean result of three determinations at 20 ± 0.5 °C :

Assay No.

Density (kg/m3)

Relative density

1

858.5

0.8585

2

858.4

0.8584

3

858.3

0.8583

Mean ± standard deviation

858.4 ± 0.1

0.8584 ± 0.0001

Relative density = density (kg/m3) / 999.975 (kg/m3) (density of water at 4°C).

The average density at 20°C ± 0.5 °C of the test item is 858 ± 1 kg/m3.

Conclusions:
The relative density at 20°C of alpha-pinene multiconstituent is 0.858 ± 0.001.
Executive summary:

The relative density of alpha-pinene multiconstituent has been measured according to OECD Guideline 109 and to EU Method A.3.

Using an oscillating densimeter, the relative density of the test item at 20 °C in reference with water at 4 °C (D20/4) was determined as 0.858 ± 0.001.

The result has been considered as reliable with restrictions because the test was performed in complinace with edicted guidelines giving scientifically valid results but some details are lacking in the report (no GLP, no report number, criteria of validity of the results not given).

Endpoint:
relative density
Type of information:
read-across from supporting substance (structural analogue or surrogate)
Adequacy of study:
supporting study
Justification for type of information:
α-Pinene is a bicyclic monounsaturated monoterpene and (-)-α-pinene is an enantiomeric form of α-pinene. Therefore, data on (-)-alpha pinene can be extrapolated to alpha-pinene. (see read-across justification document in section 13).
Reason / purpose:
read-across source
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 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.

Considering that the test was performed in compliance with edicted guidelines giving scientifically valid results and 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

Relative density of alpha-pinene multiconstituent at 20 °C: 0.858 ± 0.001.

Key value for chemical safety assessment

Relative density at 20C:
0.858

Additional information

The relative density of alpha-pinene multiconstituent 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.

However the relative density is valid for key value and supported by consistent experimental data obtained with (-)-alpha-pinene.