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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Description of key information

Key value for chemical safety assessment

Autoflammability / Self-ignition temperature at 101 325 Pa:
390 °C

Additional information

Tests with three different magnesium samples with different particle sizes (D50 39.3 µm up to 668.3 µm) were conducted at BAM (Bundesanstalt für Materialforschung und -prüfung) in accordance with UN recommendations on the transport of dangerous good, manual of tests and criteria, part III UN test N.4. Studies for self-heating testing should be initiated in accordance to that manual for classification and labelling purposes in the sense of Regulation (EC) 1272/2008.

Since magnesium powder is already legal classified in accordance to Directive 67/548/EEC Annex I as being self-heating, but during literature search no valid study could be made available to support of disprove this classification, testing was initiated.

Magnesium powder down to a D50 of 39 µm does not meet the criteria of Division 4.2 "Self-heating substance" and also not the criteria for classification as "Self-heating substances or mixtures" in sense of Regulation (EC) 1272/2008. Thus, the test item is regarded to be non self-heating and should not be classified as such.

In addition an auto flammability screening test was conducted in accordance to Regulation (EC) 440/2008 A.16 with magnesium powder (D50 58.6 µm) that results in a self-ignition temperature of 390°C.