Undecan-1-ol

Viscosity

Link to relevant study record(s)

Reference

Reference 1

Endpoint:

viscosity

Type of information:

experimental study

Adequacy of study:

key study

Study period:

2009/04/06

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

other: Test procedure in accordance with national standard methods (ASTM) without GLP.

Qualifier:

according to guideline

Guideline:

other: ASTM D446/07

Deviations:

no

GLP compliance:

no

Type of method:

capillary viscometer (static)

Temp.:

20°C

Parameter:

kinematic viscosity (in mm²/s)

Value:

20.03

Temp.:

40°C

Parameter:

kinematic viscosity (in mm²/s)

Value:

9.98

CALIBRATION

SUBSTANCE USED FOR CALIBRATION: 1-Octanol NQS08003

CALIBRATION TEMPERATURE: 25.0 °C / 25.0 °C

KINEMATIC VISCOSITY (THEORY) : 8.84 mm2/s / 8.84 mm2/s

VISCOSIMETER CONSTANT: 0.05012 / 0.05012

MEASURED FLOW TIME: 176.8 sec / 176.6 sec

KINEMATIC VISCOSITY (EXPERIMENTAL): 8.86 mm2/s / 8.85 mm2/s

MEASUREMENT

(repeat determination)

TEMPERATURE: 20.0 °C / 20.0 °C (40 °C / 40 °C)

VISCOSIMETER CONSTANT: 0.05012 / 0.05012 (0.05012 / 0.05012)

MEASURED FLOW TIME: 399.2 sec / 400.24 sec (199.03 sec / 199.09 sec)

KINEMATIC VISCOSITY: 20.01 mm2/s / 20.06 mm2/s (9.97 mm2/s / 9.98 mm2/s)

KINEMATIC VISCOSITY AVERAGE: 20.03 mm2/s (9.98 mm2/s)

Conclusions:

Kinematic viscosity of undecan-1-ol: at 20 °C: 20.03 mm²/s and at 40 °C: 9.98 mm²/s.
 

Executive summary:

Viscosity of undecan-1 -ol at 20 °C

Analysis No	Kinematic viscosity [mm²/s]	Temperature [°C]
1	20.01	20.0
2	20.06	20.0
Mean	20.03

Viscosity of undecan-1 -ol at 40 °C

Analysis No	Kinematic viscosity [mm²/s]	Temperature [°C]
1	9.97	40.0
2	9.98	40.0
Mean	9.98

Reference 2

Endpoint:

viscosity

Type of information:

experimental study

Adequacy of study:

key study

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

other: Test procedure in accordance with national standard methods (ASTM) without GLP.

Qualifier:

according to guideline

Guideline:

other: ASTM D446/07

Deviations:

no

GLP compliance:

no

Type of method:

capillary viscometer (static)

Temp.:

20°C

Parameter:

kinematic viscosity (in mm²/s)

Value:

ca. 18.64

Temp.:

40°C

Parameter:

kinematic viscosity (in mm²/s)

Value:

ca. 9.72

CALIBRATION

(repeat determination)

SUBSTANCE USED FOR CALIBRATION:1-Octanol NQS08003

CALIBRATION TEMPERATURE:25.0 °C / 25.0 °C

KINEMATIC VISCOSITY (THEORY):8.84 mm²/s / 8.84 mm²/s

VISCOSIMETER CONSTANT:0.05012 / 0.05012

MEASURED FLOW TIME:176.8 sec / 176.6 sec

KINEMATIC VISCOSITY (EXPERIMENTAL):8.86 mm²/s / 8.85 mm²/s

MEASUREMENT

(repeat determination)

TEMPERATURE:20.0 °C / 20.0 °C (40 °C / 40 °C)

VISCOSIMETER CONSTANT:0.05012 / 0.05012 (0.05012 / 0.05012)

MEASURED FLOW TIME: 371.7 sec / 372.1 sec (194.2 sec / 193.8 sec)

KINEMATIC VISCOSITY: 18.63 mm²/s / 18.65 mm²/s (9.73 mm²/s / 9.71 mm²/s)

KINEMATIC VISCOSITY AVERAGE: 18.64 mm²/s (9.72 mm²/s)

Executive summary:

Viscosity at 20 °C

Analysis No	Kinematic viscosity [mm²/s]	Temperature [°C]
1	18.63	20.00
2	18.65	20.00
Mean	18.64

Viscosity at 40 °C

Analysis No	Kinematic viscosity [mm²/s]	Temperature [°C]
1	9.73	40.00
2	9.71	40.00
Mean	9.72

Description of key information

The kinematic viscosity of undecan-1-ol is  20.03 mm²/s at 20°C.

Key value for chemical safety assessment

Viscosity:

20.03 mm²/s (static)

at the temperature of:

20 °C

Additional information

The kinematic viscosity of 20.03 mm²/s was determined for undecan-1 -ol with the use of a capillary method in accordance with ASTM D446. The result is considered to be reliable.

It is supported by a value of 9.98 mm²/s at 40°C in a second determination from the same test.

Discussion of trends in the Category of C6-24 linear and essentially-linear aliphatic alcohols:

As chain length increases, kinematic viscosity increases. This is because molecular weight is higher and intermolecular forces in the substance are all higher.