(1S,5S)-2,6,6-trimethylbicyclo[3.1.1]hept-2-ene

Viscosity

Link to relevant study record(s)

Reference

Endpoint:

viscosity

Type of information:

experimental study

Adequacy of study:

key study

Study period:

26 December 2012 - 04 April 2013

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

guideline study with acceptable restrictions

Remarks:

Study performed according to international guidelines but not under GLP and with some lack of details.

Reason / purpose for cross-reference:

reference to same study

Reason / purpose for cross-reference:

reference to other study

Qualifier:

according to guideline

Guideline:

OECD Test Guideline 114 (Viscosity of Liquids)

Deviations:

not specified

Principles of method if other than guideline:

The purpose of the study was to determine the viscosity of (-)-alpha pinene. The dynamic viscosity was determined at different shear rates and at a constant shear rate using a rotational viscosimeter

GLP compliance:

no

Type of method:

rotational viscometer (dynamic)

Key result

Temp.:

20°C

Parameter:

dynamic viscosity (in mPa s)

Value:

ca. 2.11

Remarks on result:

other: at a constant rate of 583.1 s-1. The test item was considered to be a Newtonian fluid.

The results obtained at 20°C are given in the following table "Viscosities of the test item measured at 20°C" :

Speed (1/min)	Shear stress (1/s)	Viscosity (mPa.s)
		Measure 1	Measure 2	Measure 3	Mean	Standard deviation
107,8	583,1	2,10	2,12	2,12	2,11	0,01
179,6	971,6	2,09	2,16	-	2,13
297,9	1610	2,02	2,00	-	2,01
500,0	2705	1,97	1,94	-	1,96

Conclusions:

The dynamic viscosity of (-)-alpha-pinene was determined to be 2.11 ± 0.01 mPa.s at 20.0 ± 0.1°C at a constant shear rate of 583.1 s-1.
The test item was considered to be a Newtonian fluid.
Therefore, (-)-alpha-pinene is classified for aspiration toxicity Category 1 (may be fatal if swallowed and enters airways) according to Regulation (EC) No 1272/2008 (CLP) criteria and harmful (R65: may cause lung damage if swallowed) according to Directive 67/548/EEC.

Executive summary:

The study was conducted in accordance with OECD Guideline 114 using a rotational viscosimeter, to measure the dynamic viscosity of (-)-alpha-pinene at 20°C and at constant shear rate of 583 .1 s-1. In these conditions, the dynamic viscosity was determined to be 2.11 ± 0.01 mPa.s.

Therefore, (-)-alpha-pinene is classified for aspiration toxicity Category 1 (may be fatal if swallowed and enters airways) according to Regulation (EC) No 1272/2008 (CLP) criteria and harmful (R65: may cause lung damage if swallowed) according to Directive 67/548/EEC.

Description of key information

The dynamic viscosity of (-)-alpha-pinene was determined to be 2.11 ± 0.01 mPa.s at 20.0 ± 0.1 °C at a constant shear rate of 583.1 s-1.

The test item was considered to be a Newtonian fluid.

Therefore, (-)-alpha-pinene is classified for aspiration toxicity Category 1 (may be fatal if swallowed and enters airways) according to Regulation (EC) No 1272/2008 (CLP) and harmful (R65: may cause lung damage if swallowed) according to Directive 67/548/EEC.

Key value for chemical safety assessment

Viscosity:

2.11 mPa · s (dynamic)

at the temperature of:

20 °C

Additional information

Key study conducted according to the OECD 114 Guideline.

The result is scientifically acceptable but not obtained under GLP. Therefore a reliability of 2 (reliable with restrictions) is assigned.

The viscosity value is supported by consistent experimental data obtained with alpha-pinene multiconstituent.