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Diss Factsheets

Physical & Chemical properties

Viscosity

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Endpoint:
viscosity
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2008
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: GLP status not known, information from a published handbook, acceptable with restrictions.
Principles of method if other than guideline:
The use of secondary sources of data is acceptable when they are based on a critical evaluation of peer-reviewed data and a consequent selection of a reliable and representative value for the property under investigation. The introduction to the CRC Handbook of Chemistry and Physics states that data for physical constants have been taken from many sources, including both compilations and the primary literature. Where conflicts were found, the value deemed most reliable was chosen. Therefore, although the method used is not known, the values presented here are acceptable as they are from a reliable secondary source of phys chem. data.
GLP compliance:
not specified
Type of method:
other: not reported
Specific details on test material used for the study:
N/A
Key result
Temp.:
other: 25.0°C
Parameter:
dynamic viscosity (in mPa s)
Value:
0.631

N/A

Conclusions:
The viscosity of ethylbenzene is 0.631 mPa s at 25˚C
Executive summary:

No information on the methods used is available. However, this information is taken from a reliable peer reviewed handbook and so can be considered reliable and suitable for use for this endpoint.

Endpoint:
viscosity
Type of information:
experimental study
Adequacy of study:
key study
Study period:
Up to 2008
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: GLP status not known, information from a published handbook, acceptable with restrictions.
Principles of method if other than guideline:
The use of secondary sources of data is acceptable when they are based on a critical evaluation of peer-reviewed data and a consequent selection of a reliable and representative value for the property under investigation. The introduction to the CRC Handbook of Chemistry and Physics states that data for physical constants have been taken from many sources, including both compilations and the primary literature. Where conflicts were found, the value deemed most reliable was chosen. Therefore, although the method used is not known, the values presented here are acceptable as they are from a reliable secondary source of phys chem. data.
GLP compliance:
not specified
Type of method:
other: not reported
Specific details on test material used for the study:
N/A
Key result
Temp.:
other: 25.0°C
Parameter:
dynamic viscosity (in mPa s)
Value:
0.581

N/A

Conclusions:
The viscosity of m-xylene is 0.581 mPa.s at 25˚C.
Executive summary:

No information on the methods used is available. However, this information is taken from a reliable peer reviewed handbook and so can be considered reliable and suitable for use as the key study for this endpoint.

Endpoint:
viscosity
Type of information:
experimental study
Adequacy of study:
key study
Study period:
Up to 2008
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: GLP status not known, guideline not known, information from published handbook, acceptable with restrictions
Principles of method if other than guideline:
The use of secondary sources of data is acceptable when they are based on a critical evaluation of peer-reviewed data and a consequent selection of a reliable and representative value for the property under investigation. The introduction to the CRC Handbook of Chemistry and Physics states that data for physical constants have been taken from many sources, including both compilations and the primary literature. Where conflicts were found, the value deemed most reliable was chosen. Therefore, although the method used is not known, the values presented here are acceptable as they are from a reliable secondary source of phys chem. data.
GLP compliance:
not specified
Type of method:
other: not reported
Specific details on test material used for the study:
N/A
Key result
Temp.:
other: 25.0°C
Parameter:
dynamic viscosity (in mPa s)
Value:
0.76

N/A

Conclusions:
The viscosity of o-xylene at 25˚C is 0.76 mPa.s.
Executive summary:

No information on the methods used is available. However, this information is taken from a reliable peer reviewed handbook and so can be considered reliable and suitable for use as the key study for this endpoint.

Endpoint:
viscosity
Type of information:
experimental study
Adequacy of study:
key study
Study period:
Up to 2008
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: GLP status not known, information from a published handbook, acceptable with restrictions.
Principles of method if other than guideline:
The use of secondary sources of data is acceptable when they are based on a critical evaluation of peer-reviewed data and a consequent selection of a reliable and representative value for the property under investigation. The introduction to the CRC Handbook of Chemistry and Physics states that data for physical constants have been taken from many sources, including both compilations and the primary literature. Where conflicts were found, the value deemed most reliable was chosen. Therefore, although the method used is not known, the values presented here are acceptable as they are from a reliable secondary source of phys chem. data.
GLP compliance:
not specified
Type of method:
other: not reported
Specific details on test material used for the study:
N/A
Key result
Temp.:
other: 25.0°C
Parameter:
dynamic viscosity (in mPa s)
Value:
0.603

N/A

Conclusions:
The viscosity of p-xylene is 0.603 mPa.s at 25°C.
Executive summary:

No information on the methods used is available. However, this information is taken from a reliable peer reviewed handbook and so can be considered reliable and suitable for use as the key study for this endpoint.

Description of key information

The viscosity of the xylene isomers ranges from 0.581 to 0.76 mPa s at 25˚C. The viscosity of m-xylene is 0.58 mPa s (0.67 mm2/s), for o-xylene it is 0.76 mPa s (0.87 mm2/s), for p-xylene it is 0.60 mPa s (0.70 mm2/s) and for ethylbenzene it is 0.631 mPa s (0.73 mm2/s).

The mean value of 0.7425 mm2/sec will be used in the risk assessment.

Key value for chemical safety assessment

Viscosity:
0.743 mm²/s (static)
at the temperature of:
20 °C

Additional information

The CRC Handbook (Lide, 2008) is a peer reviewed handbook and so can be considered reliable and suitable for use as the key study for this endpoint.