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Physical & Chemical properties

Viscosity

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Description of key information

Butylal viscosity was measured in two experiments:

Dynamic viscosity was measured from 10 to 130°C in Palczewka-Tulinska & Szafranski (2000) experiment. Dynamic viscosity of 1.056 mPa · s at 20°C was calculated from equation developped with experimental data.

Static viscosity was measured in Durieux (1995) experiment as 1.083 E-6 m2/s at 25°C.

Key value for chemical safety assessment

Viscosity:
1.056 mPa · s (dynamic)
at the temperature of:
20 °C

Additional information

In Palczewka-Tulinska & Szafranski (2000) experiment, Dynamic Viscosity (DV) was measured at temperature (T) from 10 to 130°C. Whereas not measured at 20 or 25°C, DV was derived from the following equation established with experimental data:

log DV = -1.85894 + (541.0837/(T-5.7569)) with DV in mPa · s and T in °C.

DV at 20°C: 1.056 mPa · s

DV at 25°C: 0.981 mPa · s

Static Viscosity (SV) was calculated from DV using butylal density (measured in the same study and presented under "Density" point).

SV at 20°C: 1.264 E-6 m2/s

SV at 25°C: 1.180 E-6 m2/s

In Durieux (1995) experiment, SV was measured at 25°C as 1.083 E-6 m2/s