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Physical & Chemical properties

Viscosity

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Description of key information

All substances of the MDI category except the monomeric MDI substances are liquid at room temperature. The kinematic viscosities are broadly consistent due to the presence of a relatively high concentration of mMDI.  All the other substances of the MDI category are liquid at room temperature. The kinematic viscosities are broadly consistent due to the presence of a relatively high concentration of mMDI. A supporting study was performed at Chilworth (2014). A new study to determine the viscosity of the substance was performed at Dekra (2019). The test is conducted in accordance with ISO 3104:1994 and OECD Test Guideline 114 and gave the following results:


At 20°C (mean of 2 runs) 1098 Cst; at 40°C (mean of 2 runs) 179 Cst

Key value for chemical safety assessment

Viscosity:
1 098 mm²/s (static)
at the temperature of:
20 °C

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