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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Physical & Chemical properties

Auto flammability

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Administrative data

Link to relevant study record(s)

relative self-ignition temperature (solids)
Type of information:
other: expert judgement
Adequacy of study:
key study
Study period:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: expert judgement
Principles of method if other than guideline:
Expert judgement.
Remarks on result:
not measured/tested
expert judgment based on handling and use
Non autoflammable based on prolonged experience in handling and use.
Executive summary:


Expert judgement based on prolonged experience in handling and use.


Non autoflammable.

Description of key information

Non autoflammable

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. Many dyes were tested and did not show low autoignition temperature. Based on read across information, the substance is expected to decompose above 300 °C and to be non flammable.

Overall,  a potential for spontaneous ignition is not expected: the substance can be considered as a non pyrophoric and non 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.

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.

Available experimental studies on read across substances, i.e. Similar Substance 01 and 02 were considered as supporting information. A detailed description of read across process is attached in section 13.

In both cases, assessment of autoignition properties relied on EU method A.16.

Similar Substance 01 showed self-ignition at 213 °C, as reported in NONS file, as per Article 25(3) request, woth permission to refer granted by ECHA.

Similar Substance 02 showed self-ignition at 249 °C.