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Physical & Chemical properties

Auto flammability

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Link to relevant study record(s)

Description of key information

No auto ignition properties.

Key value for chemical safety assessment

Additional information

According to Annex VII of the REACH Regulation (EC 1907/2206), the study does not need to be conducted for solids, if the substance has a melting point < 160°C, or if preliminary results exclude self-heating of the substance up to 400°C.

A DSC analysis showed that test substance melts between 110 and 157 °C, then decomposition occurs starting at 246 °C.

In addition, the substance is produced and regularly used for many years in Europe, transported in various conditions and in various amounts. Evidence connected to the long experience in handling, use and transport of the substance confirms the non- self-ignition properties. Thus, the substance is expected to be an air-stable compound at room temperature over a prolonged period of time (days), without noticeable or undesirable reactions.

In conclusion, a potential for spontaneous ignition is not expected: the substance can be considered as a no-pyrophoric and no-self-heating solid because it is not liable to self-heat by reaction with air and without energy supply. In addition, the substance is soluble in water at room temperature and no reactions with water or emission of flammable gases have ever been noted. Furthermore, for soluble dyes a reaction with water is not a desirable property from the use point of view. Therefore, the substance is considered to be not classified as a substance that in contact with water may react generating flammable gases.