Registration Dossier
Registration Dossier
Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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.
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EC number: 231-673-0 | CAS number: 7681-57-4
Melting point / freezing point
Administrative data
Link to relevant study record(s)
- Endpoint:
- melting point/freezing point
- Type of information:
- experimental study
- 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:
- no
- Type of method:
- other: not stated
- Decomposition:
- yes
- Decomp. temp.:
- > 150 °C
- Conclusions:
- Sodium metabisulfite decomposes at temperatures >150° C.
- Executive summary:
Sodium metabisulfite decomposes at temperatures >150°C.
- Endpoint:
- melting point/freezing point
- Type of information:
- experimental study
- Adequacy of study:
- supporting study
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- secondary literature
- Remarks:
- Peer reviewed data
- Qualifier:
- no guideline followed
- Principles of method if other than guideline:
- Not applicable - Peer reviewed data
- GLP compliance:
- not specified
- Type of method:
- other: no data
- Decomposition:
- yes
- Decomp. temp.:
- > 150 °C
- Conclusions:
- The substance has a decompostion temperature > 150 °C.
Referenceopen allclose all
Description of key information
Decomposition temperature of disodium disulfite: > 150 °C
Key value for chemical safety assessment
Additional information
For the evaluation of this endpoint data from the CRC Handbook were used as key information, supported by the information from the IARC Monographs on the Evaluation of Carcinogenic Risks to Humans.
According to ECHA, guidance on information requirements and chemical safety assessment – chapter R.7a, specific handbook data for physic-chemical properties are considered to be a reliable data source. Useful reference books and data compilations containing peer reviewed physico-chemical data include the CRC Handbook of Chemistry and Physics.
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.
