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Physical & Chemical properties

Auto flammability

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Description of key information

Thiourea is non-autofammable.

Key value for chemical safety assessment

Additional information

The test determines the ignition temperature of a deposited dusty test substance on hot surfaces. The test is conducted according to the test protocol. The surface area of the substance is increased intentionally in this test by preparing the test substance accordingly to simulate the deposited dusty properties. The ignition temperature of deposited dusty test material is expected to be lower than the ignition temperature of the solid with larger particle diameters.

Melting of the test substance was observed from 240 °C on with slight hissing noise, foaming and smoke development (increases with increasing temperature). Thus, thiourea was categorized in BWZ 1.