Registration Dossier
Registration Dossier
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EC number: 231-821-4 | CAS number: 7757-83-7
Melting point / freezing point
Administrative data
Link to relevant study record(s)
- Endpoint:
- melting point/freezing point
- Type of information:
- other: Handbook data
- Adequacy of study:
- key study
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- data from handbook or collection of data
- Remarks:
- From a trusted source acc. to "ECHA, Guidance on information requirements and chemical safety assessment – Chapter R.7a: Endpoint specific guidance".
- Qualifier:
- no guideline followed
- Principles of method if other than guideline:
- Not applicable - Handbook data
- GLP compliance:
- not specified
- Type of method:
- other: no data
- Melting / freezing pt.:
- 911 °C
- Conclusions:
- According to the reference, sodium sulphite has a melting point of 911 °C.
- Endpoint:
- melting point/freezing point
- Type of information:
- other: peer reviewed database
- 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 database
- GLP compliance:
- not specified
- Type of method:
- other: no data
- Decomposition:
- yes
- Decomp. temp.:
- 617 °C
- Conclusions:
- According to the reference, sodium sulfite decomposes at a temperature of 617 °C.
- Endpoint:
- melting point/freezing point
- 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 apllicable - Peer reviewed data
- GLP compliance:
- not specified
- Type of method:
- other: no data
- Decomposition:
- yes
- Conclusions:
- According to the reference, sodium sulfite decomposes before melting. No data are available for the decomposition temperature.
- Endpoint:
- melting point/freezing point
- Type of information:
- other: authoritative secondary source
- Adequacy of study:
- supporting study
- Reliability:
- 4 (not assignable)
- Rationale for reliability incl. deficiencies:
- secondary literature
- Remarks:
- authoritative secondary source
- Qualifier:
- no guideline followed
- GLP compliance:
- not specified
- Type of method:
- other: no data
- Decomposition:
- yes
- Conclusions:
- According to the reference, sodium sulfite decomposes before melting. No data available for decomposition temperature.
Referenceopen allclose all
Value from general accepted authoritative secondary source. No data available for decomposition temperature.
Value from general accepted authoritative secondary source. No data available for decomposition temperature. It melts only with decomposition.
Description of key information
Sodium sulfite has a melting point of 911 °C.
Key value for chemical safety assessment
- Melting / freezing point at 101 325 Pa:
- 911 °C
Additional information
For the evaluation of this endpoint data from the CRC handbook were used as key information supported by information from three additional handbooks. According to the REACH regulation ("ECHA, guidance on information requirements and chemical safety assessment - chapter R.7.a"), it is allowed to use specific handbook data as a reliable data source. Useful reference books and data compliations containing peer reviewed physico-chemical data include the CRC handbook of Chemistry and Physics.
According to the CRC handbook, sodium sulphite has a melting point of 911 °C. The other references indicate that sodium sulfite decomposes before melting (at 617 °C). However, no data are available under which conditions the melting/decomposition point was determined.
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.
