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Physical & Chemical properties

Auto flammability

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Description of key information

Based on structural analogues, the self-ignition (autoflammability) temperature of the substance is estimated to be greater than 600°C.

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Additional information

The test substance is covered by the category approach of methylenediphenyl diisocyanates (MDI). Hence, data of the category substances can be used to cover this endpoint. No self-ignition temperature data is available for MDI mixed isomers. Some data is available on the structural analogues 4,4'-MDI (heated above room temperature) and oMDI. No self-ignition was observed in the Fisk and Langner study (1995) for 4,4'-MDI up to 601 degrees Celsius following EU method A.15. In the Fisk and Langer (1995) study, the self-ignition (autoflammability) for oMDI was determined for the test substance. Following the EU method A.15, the self-ignition temperature was determined to be greater than 600 degrees Celsius. Hence, it can be concluded that the self-ignition temperature for MDI mixed isomers will be above 600 degrees Celsius.