Registration Dossier
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EC number: 231-836-6 | CAS number: 7758-19-2
Melting point / freezing point
Administrative data
Link to relevant study record(s)
- Endpoint:
- melting point/freezing point
- Data waiving:
- study technically not feasible
- Justification for data waiving:
- other:
- Justification for type of information:
- JUSTIFICATION FOR DATA WAIVING
In accordance to REACH Annex XI Section 2, with reference to the guidance mentioned in REACH Art 13(3) the test guidance "ECHA guidance on Information requirements and chemical safety assessment Chapter R.7a Endpoint specific guidance" needs to be respected. This guidance (R.7.1.2.3) indicates that for substances that decompose or sublime before melting, the decomposition or sublimation temperature should be reported. - Reason / purpose for cross-reference:
- data waiving: supporting information
- Reason / purpose for cross-reference:
- data waiving: supporting information
- Reason / purpose for cross-reference:
- data waiving: supporting information
- Reason / purpose for cross-reference:
- data waiving: supporting information
- 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:
- other: Handbook peer reviewed.
- Principles of method if other than guideline:
- No data on test method.
- GLP compliance:
- not specified
- Type of method:
- other: No data
- Key result
- Decomposition:
- yes
- Decomp. temp.:
- 180 - 200 °C
- Conclusions:
- Sodium chlorite decomposes at 180–200 ºC.
- Executive summary:
Sodium chlorite decomposes at 180–200 ºC. No data provided on the method.
- 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:
- data from handbook or collection of data
- Remarks:
- ICSC database.
- Principles of method if other than guideline:
- No data on test method.
- GLP compliance:
- not specified
- Type of method:
- other: No data
- Key result
- Decomposition:
- yes
- Decomp. temp.:
- 180 - 200 °C
- Conclusions:
- Sodium chlorite decomposes below melting point at 180-200 °C.
- Executive summary:
Sodium chlorite decomposes below melting point at 180-200 °C. No data provided on the method.
- 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:
- data from handbook or collection of data
- Remarks:
- Handbook peer reviewed.
- Principles of method if other than guideline:
- No data on test method.
- GLP compliance:
- not specified
- Type of method:
- other: No data
- Key result
- Decomposition:
- yes
- Decomp. temp.:
- 180 - 200 °C
- Conclusions:
- Sodium chlorite decomposes on heating with evolution of O2.
- Executive summary:
Sodium chlorite decomposes on heating with evolution of O2. No data provided on the method.
- 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:
- data from handbook or collection of data
- Remarks:
- Handbook peer reviewed.
- Principles of method if other than guideline:
- No data on test method.
- GLP compliance:
- not specified
- Type of method:
- other: No data
- Key result
- Decomposition:
- yes
- Decomp. temp.:
- 180 - 200 °C
- Conclusions:
- Sodium chlorite decomposes at 180–200 ºC.
- Executive summary:
Sodium chlorite decomposes at 180–200 ºC. No data provided on the method.
- Endpoint:
- melting point/freezing point
- Type of information:
- experimental study
- Adequacy of study:
- supporting study
- Study period:
- February 21, 2002
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 102 (Melting point / Melting Range)
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.1 (Melting / Freezing Temperature)
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- hot stages
- Key result
- Melting / freezing pt.:
- 232 - 236 °C
- Atm. press.:
- 97.1 kPa
- Conclusions:
- The mean melting point of the test item was in the experimental conditions:234°C ± 2°C.
- Executive summary:
The aim of this study was the determination of the melting point of the test material.
The test procedure used was the EU A1 method and the OECD test guideline 102.
The apparatus for analysis was the Kofler hot bench.
The result was as follows:
the mean melting point of the test item was in the experimental conditions: 234°C ± 2°C.
Referenceopen allclose all
Sodium chlorite decomposes at 180–200 ºC.
Sodium chlorite decomposes below melting point at 180-200 °C.
Sodium chlorite decomposes on heating with evolution of O2.
Sodium chlorite decomposes at 180–200 ºC.
Comments: according to the Sponsor, the test item contains impurities (purity = 76.80%) that leads to the appearance of a “milky liquid” on reaching the melting point but it is not possible to determine whether a liquid state can be attained for a substance at a purity of 100%. However, it is impossible to prepare a test item more pure than 80% for stability reasons
Description of key information
Data waiving (study scientifically not feasible): In accordance to REACH Annex XI Section 2, with reference to the guidance mentioned in REACH Art 13(3) the test guidance "ECHA guidance on Information requirements and chemical safety assessment Chapter R.7a Endpoint specific guidance" needs to be respected. This guidance (R.7.1.2.3) indicates that for substances that decompose or sublime before melting, the decomposition or sublimation temperature should be reported.
Supporting studies: Data from handbooks:
Sodium chlorite decomposes below melting point at 180-200 °C.
Supporting study: Experimental results:
Test method according to EU A1 method and the OECD test guideline 102 (purity 76.80%).
The mean melting point of the test item was in the experimental conditions: 234°C ± 2°C.
Key value for chemical safety assessment
Additional information
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.
