Registration Dossier
Registration Dossier
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EC number: 231-850-2 | CAS number: 7759-02-6
Flammability
Administrative data
Link to relevant study record(s)
Description of key information
Key value for chemical safety assessment
- Flammability:
- non flammable
Additional information
Flammability of solids (metal salts)
Testing of flammability is not considered to be required for inorganic metal salts in which (i) the cation is in its highest possible oxidation state (e. g. Sr2+) and which therefore is incapable of further reaction with oxygen, and (ii) the anionic component is similarly not capable of further reaction with oxygen, as it is for sulfur. Furthermore, long-term industrial experience in handling shows that strontium sulfate is not flammable. This substance can thus be designated as non-flammable (Guidance on information requirements and chemical safety assessment Chapter R.7a: Endpoint specific guidance, section R.7.1.10.3).
Pyrophoricity
In accordance with Regulation (EC) No 1907/2006 Annex XI, Section 1, testing for pyrophoric properties of solids is not considered to be required, since strontium sulfate is stable at ambient temperature. It also does not contain any chemical groups that might lead to spontaneous ignition a short time after coming in contact with air at room temperature (ca. 20 °C). Furthermore, long-term industrial experience in handling shows that strontium sulfate does not ignite (spontaneously) (i. e. the autoignition temperature is not below room temperature) in contact with air.
Flammability in contact with water
In accordance with Regulation (EC) No 1907/2006 Annex XI, Section 1, testing of flammability in contact with water is not considered to be required, because strontium sulfate does not contain groups that might lead to a reaction with water or damp air, leading to the development of dangerous amounts of gas or gases which may be highly flammable. Furthermore, long-term industrial experience in practical handling of strontium sulfate shows that it does not react with water and will not ignite with water or humid air.
Justification for classification or non-classification
Strontium sulfate does not need to be classified for flammability according to Directive 67/548 EEC and CLP Regulation (EC) No 1272/2008 based on chemical structure and the lack of functional groups.
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
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