2-chlorotoluene

Viscosity

Link to relevant study record(s)

Reference

Reference 1

Endpoint:

viscosity

Type of information:

experimental study

Adequacy of study:

weight of evidence

Study period:

No data

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

data from handbook or collection of data

Principles of method if other than guideline:

No data available on guideline / method followed

GLP compliance:

not specified

Key result

Temp.:

40°C

Parameter:

kinematic viscosity (in mm²/s)

Value:

>= 0.657 - <= 0.893

Temp.:

other: 25 °C

Parameter:

kinematic viscosity (in mm²/s)

Value:

0.893

Temp.:

other: 25 °C

Parameter:

dynamic viscosity (in mPa s)

Value:

0.964

Temp.:

other: 50 °C

Parameter:

kinematic viscosity (in mm²/s)

Value:

0.657

Remarks on result:

other: Calculated ex post from dynamic viscosisty and the density (1.08 g/cm^3)

Temp.:

other: 50 °C

Parameter:

dynamic viscosity (in mPa s)

Value:

0.71

Values reported in CRC handbook (LIDE, 2013) refer to a nominal pressure of 1 atmosphere.
According to LIDE (2013), "The accuracy of the values ranges from 1% in the best cases to 5 to 10 % in the worst cases." "Values were derived by fitting experimental data to suitable expressions for the temperature dependence."
The following original references for the data reported are given (it was not traced from which specific reference the data for 2-chlorotoluene originate):
1) Viswanath, D. S. and Natarajan, G., Data Book on the Viscosity of Liquids, Hemisphere Publishing Corp., New York, 1989.
2) Daubert, T. E., Danner, R. P., Sibul, H. M., and Stebbins, C. C., Physical and Thermodynamic Properties of Pure Compounds: Data Compilation, extant 1994 (core with 4 supplements), Taylor & Francis, Bristol, PA (also available as database).
3) Ho, C. Y., Ed., CINDAS Data Series on Material Properties, Vol. V-1, Properties of Inorganic and Organic Fluids, Hemisphere Publishing Corp., New York, 1988.
4) Stephan, K. and Lucas, K., Viscosity of Dense Fluids, Plenum Press, New York, 1979.
5) Vargaftik, N. B., Tables of Thermophysical Properties of Liquids and Gases, 2nd ed., John Wiley, New York, 1975

 

The following viscosity values for further temperatures are reported (kinematic viscosities calculated ex post from the density of 1.08 g/cm^3):

Dynamic viscosity:	[mPa*s]	Kinematic viscosity [mm^2/s]
at 0°C	1.390	1.287
at 25°C	0.964	0.893
at 50°C	0.710	0.657
at 75°C	0.547	0.506
at 100°C	0.437	0.405

 

Conclusions:

The dynamic viscosity (Lide, 2013) of 2-chlorotoluene is 0.964 mPa*s at 25 °C and 0.710 mPa*s at 50 °C.
Kinematic viscosity of 1-chloro-2-methylbenzene at 40 °C: >= 0.657 mm^2/s <= 0.893 mm^2/s (Lide, 2013).

Executive summary:

The dynamic viscosity of 2-chlorotoluene is reported in the CRC Handbook of Chemistry and Physics 94th edition (Lide, 2013). Based on the background information given, the accuracy of the values ranges from 1% in the best cases to 5 to 10 % in the worst cases. Original references are given. Accordingly, the results may be regarded as reliable. The values reported for 25 °C and 50 °C are relevant for classification regarding Aspiration hazard, for which the kinematic viscosity determined at 40 °C is relevant. Kinematic viscosities determined for temperatures embracing the target temperature of 40 °C (for which the cut-off value according to EU-GHS is specified) may allow deciding on any classification requirements regarding Aspiration hazard. Therefore, the kinematic viscosity was calculated ex post from the density of 1.08 g/cm^3. Accordingly, the following reliable results on viscosity relevant for 2-chlorotoluene are available:
The dynamic viscosity (Lide, 2013) of 2-chlorotoluene is 0.964 mPa*s at 25 °C and 0.710 mPa*s at 50 °C.
The kinematic viscosity of 1-chloro-2-methylbenzene at 40 °C is >= 0.657 mm^2/s and <= 0.893 mm^2/s (Lide, 2013).

Reference 2

Endpoint:

viscosity

Type of information:

experimental study

Adequacy of study:

weight of evidence

Study period:

Not specified

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

data from handbook or collection of data

Principles of method if other than guideline:

No data available on guideline / method followed

GLP compliance:

not specified

Type of method:

other: no data

Key result

Temp.:

20°C

Parameter:

dynamic viscosity (in mPa s)

Value:

1.022

The following further data are reported by Rossberg (2006) for 2-chlorotoluene:

Dynamic viscosity:	[mPa*s]
at 10°C	1.188
at 20°C	1.022
at 60°C	0.603
at 100°C	0.439

 

Conclusions:

The viscosity of 1-chloro-2-methylbenzene was 1.022 mPa*s at 20°C. (Rossberg, 2006)

Executive summary:

The viscosity of 1-chloro-2-methylbenzene was 1.022 mPa*s at 20°C. (Rossberg, 2006)

Description of key information

Dynamic viscosity of 1-chloro-2-methylbenzene at 20 °C: 1.022 mPa*s (Rossberg, 2006).
Kinematic viscosity of 1-chloro-2-methylbenzene at 40 °C: >= 0.657 mm^2/s <= 0.893 mm^2/s (Lide, 2013).

Key value for chemical safety assessment

Viscosity:

1.022 mPa · s (dynamic)

at the temperature of:

20 °C

Additional information

A weight of evidence was performed based on two relevant and reliable handbooks / data collections, namely Ullmann's Encyclopaedia of Industrial Chemistry (Rossberg, 2006) and CRC Handbook of Chemistry and Physics, 94th Edition (Lide, 2013).
According to Rossberg (2006), the dynamic viscosity of 1-chloro-2-methylbenzene is reported as 1.022 mPa*s at 20°C. Because 20 °C is the common reference temperature for the dynamic viscosity, this result was taken as the key result for the endpoint.
The second relevant data source is the CRC Handbook of Chemistry and Physics 94th edition (Lide, 2013) reporting the dynamic viscosity of 2-chlorotoluene for different temperatures. Based on the background information given, the accuracy of the values ranges from 1% in the best cases to 5 to 10 % in the worst cases. Original references are given. Accordingly, the results may be regarded as reliable. The values reported for 25 °C and 50 °C are relevant for classification regarding Aspiration hazard, for which the kinematic viscosity determined at 40 °C is relevant. Kinematic viscosities determined for temperatures embracing the target temperature of 40 °C (for which the cut-off value according to EU-GHS is specified) may allow deciding on any classification requirements regarding Aspiration hazard. Therefore, the kinematic viscosity was calculated ex post from the density of 1.08 g/cm^3. Accordingly, the following reliable results on viscosity relevant for 2-chlorotoluene are available:
The dynamic viscosity (Lide, 2013) of 1-chloro-2-methylbenzene is 0.964 mPa*s at 25 °C and 0.710 mPa*s at 50 °C.
The kinematic viscosity of 1-chloro-2-methylbenzene at 40 °C is >= 0.657 mm^2/s and <= 0.893 mm^2/s (Lide, 2013).

According to REGULATION (EC) No. 1272/2008 (CLP) certain chlorinated hydrocarbons have been shown to pose an aspiration hazard in humans. However, classification for aspiration hazard based on the kinematic viscosity determined at 40 °C is exclusively foreseen for hydrocarbons. Accordingly, in spite of a kinematic viscosity at 40 °C <= 20.5 mm^2/s, this criterion is not applicable to the chlorinated hydrocarbon 1-chloro-2-methylbenzene. Consequently, the substance is not classified for Aspiration hazard.

The following data table demonstrates that data from both sources do agree very well with each other, corroborating the validity and reliability of the data:
CRC Handbook (2013/14)

Dynamic viscosity: [mPa*s] Kinematic v. [mm^2/s]
at 0°C 1.39 1.287
at 25°C 0.964 0.893
at 50°C 0.71 0.657
at 75°C 0.547 0.506
at 100°C 0.437 0.405
Rossberg (2006)

Dynamic viscosity:

at 10°C 1.188 mPa*s
at 20°C 1.022 mPa*s
at 60°C 0.603 mPa*s
at 100°C 0.439 mPa*s