Registration Dossier
Registration Dossier
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EC number: 231-821-4 | CAS number: 7757-83-7
Auto flammability
Administrative data
Link to relevant study record(s)
- Endpoint:
- auto-flammability
- Type of information:
- other: Peer reviewed data
- Adequacy of study:
- supporting study
- Reliability:
- 4 (not assignable)
- Rationale for reliability incl. deficiencies:
- secondary literature
- Qualifier:
- no guideline followed
- Principles of method if other than guideline:
- Not applicable - Peer reviewed data
- GLP compliance:
- not specified
- Conclusions:
- Self-ignition is not considered to be of relevance for this substance, since this would require heat to be developed either by reaction of this substance with oxygen or by exothermic decomposition and which is not lost rapidly enough to the surroundings. Since sodium sulfite is stable up to a temperature of 600 °C, it can safely be assumed that this compound will not ignite under the conditions given in EU-Method A.16. In conclusion, the conduct of further experimental verification is not considered to be required (in accordance with section 1, Annex XI of Regulation (EC) 1907/2006 (REACH)).
- Endpoint:
- relative self-ignition temperature (solids)
- Data waiving:
- study scientifically not necessary / other information available
- Justification for data waiving:
- other:
Referenceopen allclose all
Na2SO3 is stable up to 600 °C.
Description of key information
Self-ignition is not considered to be of relevance for sodium sulfite
Key value for chemical safety assessment
Additional information
Self-ignition is not considered to be of relevance for this substance, since this would require heat to be developed either by reaction of this substance with oxygen or by exothermic decomposition and which is not lost rapidly enough to the surroundings. Since sodium sulfite represents high and stable oxidation states of all elements included it is intrinsically not combustible and can safely be assumed not to be ignitable under the conditions given Test N4 Part III, sub-section 33.4.1.6 of the “UN Recommendations on the Transport of Dangerous Good, Manual of Tests and Criteria”. Furthermore, long-term industrial experience in handling shows that the substance has no self heating properties. In accordance with section 7.12, Column 2, Annex VII of Regulation (EC) 1907/2006, a study does not need to be conducted, if preliminary results exclude self- heating of the substance up to 400 °C. The substance ist stable up to 600 °C (see supporting information "s_IARC1992.Auto flammability").
In conclusion, the conduct of further experimental verification is not considered to be required.
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.
Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.
