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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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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relative self-ignition temperature (solids)
Type of information:
experimental study
Adequacy of study:
key study
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
guideline study with acceptable restrictions
according to guideline
EU Method A.16 (Relative Self-Ignition Temperature for Solids)
The test item was stored at 10.9 - 31.4 °C instead of 20 ± 5 °C. This is uncritical as the test item is an inorganic substance. The heating rate was 0.59 K/min. instead of 0.5 K/min. This was considered also uncritical.
GLP compliance:
yes (incl. QA statement)
(Landesamt für Umwelt-, Wasserwirtschaft und Gewerbeaufsicht, Rheinland-Pfalz)
Key result
Remarks on result:
no self ignition observed under the test conditions

No sharp increase in the temperature of the sample in comparison to that of the oven could be detected, also no signs of ignition could be observed. After the measurement the test item remained unchanged.

Test item Silicic acid Aluminium Magnesium Sodium Salt should be considered as not auto-flammable up to the 400 °C under the test conditions.
relative self-ignition temperature (solids)
Data waiving:
study technically not feasible
Justification for data waiving:

Description of key information

The substance silicic acid, aluminium sodium salt is an inorganic oxide in which the inorganic elements are in the highest possible oxidation state. Therefore the substance is incapable of further reaction with oxygen/air and can thus be designated as non-flammable.

Also, the read-across substance Silicic acid Aluminium Magnesium Sodium Salt was considered as not auto-flammable up to the 400 °C under the test conditions.

Key value for chemical safety assessment

Additional information

based on structure the substance is incapable of reaction with oxygen/air