Registration Dossier
Registration Dossier
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EC number: 280-007-5 | CAS number: 82640-07-1
Auto flammability
Administrative data
Link to relevant study record(s)
Description of key information
Key value for chemical safety assessment
Additional information
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 liable to self-heat by reaction with air and without energy supply. 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. Furthermore, for soluble dyes a reaction with water is not a desirable property from the use point of view. Therefore, the substance cannot be classified as a substance that in contact with water may react generating flammable gases.
Moreover, an existing study on a similar substance was considered as supporting information:
The determination of the auto-ignition temperature has been conducted in accordance with the EEC Directive Annex V of 67/548 Test A 16 auto-ignition temperature for solids.
The temperatures of the oven and sample are continuously recorded while the temperature of the oven is increased to 400°C, or to the melting point if lower, at a rate of 0.5°C/min.
When the substance ignites the sample thermocouple will show a very sharp temperature rise above the oven temperature. The temperatures of the oven and sample are continuously recorded.
Temperature of the test substance exceeded oven temperature in ca 250 °C.
There was sharp rise of temperature reaching the value 408°C (corresponds to the temperature 400 °C after correction) when the temperature of the oven was 269.3 °C for the first experiment and 265.8 for the second experiment. Mean temperature after correction was 260.9 °C.
Relative self-ignition temperature of the test substance is 260.9 °C.
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