Butane-1,4-diol

Viscosity

Link to relevant study record(s)

Reference

Endpoint:

viscosity

Type of information:

experimental study

Adequacy of study:

key study

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

GLP compliance:

not specified

Type of method:

other: No data

Key result

Temp.:

20°C

Parameter:

dynamic viscosity (in mPa s)

Value:

84.9

Key result

Temp.:

20°C

Parameter:

kinematic viscosity (in mm²/s)

Value:

83.2

Remarks on result:

other: Calculated: Dynamic viscosity divided by density of 1,4-butanediol of 1.02 g/cm3

Description of key information

Dynamic viscosity: 84.9 mPa s at 20 °C

Kinematic viscosity: 83.2 mm2/s at 20 °C (calculated using density of 1.02 g/cm3)

Key value for chemical safety assessment

Viscosity:

83.2 mm²/s (static)

at the temperature of:

20 °C

Additional information

The measured dynamic viscosity of 1,4 -Butanediol (BDO) is 84.9 mPa-s at 20 °C (Hort, E.V. and Taylor, P., 2001), as reported in a reliable authoritative secondary source. According to REACH Guidance document R.7a (May 2008), this equates to a Kinematic viscosity value of 83.2 mm2/s at 20 °C when calculated using a density for 1,4 -Butanediol of 1.02 g/cm3. Another dynamic viscosity value of 83.5 mPa-s has also been reported in a different reliable authoritative secondary source.

Classification and Labeling - Given that the kinematic viscosity is >20.5 mm2/s, BDO would not be classified as an aspiration hazard.