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Physical & Chemical properties

Auto flammability

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relative self-ignition temperature (solids)
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Description of key information

Study waived.

Key value for chemical safety assessment

Additional information

Handling experience with the substance indicates stable behaviour when in contact with air at room temperature over a prolonged period of time (days), without noticeable or undesirable reactions. Thus, it can be concluded that for the substance a potential for spontaneous ignition is not expected:  - the substance can be considered as a non-pyrophoric solid because it does not react with air in small amounts in a more or less instantaneous manner;  - the substance can be considered as a non-self-heating solid because it does not react with air in large amounts and after an extended period of time. The subsance is produced and used regularly since many years in Europe according to the above qualifications, transported by ship from outside Europe under various conditions and in various amounts. Evidence connected to the long experience in handling and use of the molecule confirms the not spontaneous ignition property. In addition, the substance is soluble in water at room temperature and forms a stable solution with water. No reactions with water or emission of flammable gases have ever been noted. For soluble dyes a reaction with water is not a desirable property from the use point of view.