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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

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Physical & Chemical properties

Auto flammability

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Administrative data

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relative self-ignition temperature (solids)
Type of information:
experimental study
Adequacy of study:
key study
Study period:
10 March 2017 - 21 March 2017
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
according to guideline
EU Method A.16 (Relative Self-Ignition Temperature for Solids)
not specified
GLP compliance:
yes (incl. QA statement)
Specific details on test material used for the study:
Batch/Lot Number: 150205
Appearance: Blue powder
Purity: As a UVCB purity is considered as 100%
Key result
Relative self-ignition temperature:
ca. 218 °C
Three replicate tests were performed. The average of the measured data was reported. The three measured value was: 217, 218 and 220 °C.
The relative self-ignition temperature of B440: 218°C.

Description of key information

The relative self-ignition temperature of B440 was found to be 218°C.

Key value for chemical safety assessment

Autoflammability / Self-ignition temperature at 101 325 Pa:
218 °C

Additional information