Registration Dossier
Registration Dossier
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EC number: 233-139-2 | CAS number: 10043-35-3
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
- Study period:
- 2003
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Reason / purpose for cross-reference:
- reference to same study
- Reason / purpose for cross-reference:
- reference to same study
- Reason / purpose for cross-reference:
- reference to same study
- Reason / purpose for cross-reference:
- reference to same study
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.1 (Melting / Freezing Temperature)
- Deviations:
- not specified
- GLP compliance:
- yes
- Type of method:
- thermal analysis
- Key result
- Decomposition:
- yes
- Decomp. temp.:
- > 100 °C
- Conclusions:
- No melting point can be defined in the range 25 - 1000 °C due to the decomposition of the substance above 100 °C.
- Executive summary:
The melting point of the test substance was determined with Differential Thermal Analysis according to EU Method A.1 and GLP. No melting point can be defined in the range 25 - 1000 °C due to the decomposition of the substance above 100 °C. If heated above 100 °C water is lost and boric acid converts initially to metaboric acid (HBO2) and on further heating forms boric oxide (B2O3).
Reference
No melting point can be defined in the range 25 - 1000 °C due to the decomposition of the substance. If heated above 100 °C water is lost and boric acid converts initially to metaboric acid (HBO2) and on further heating forms boric oxide (B2O3)
Description of key information
The melting point of the test substance was determined with Differential Thermal Analysis according to EU Method A.1 and GLP. No melting point can be defined in the range 25 - 1000 °C due to the decomposition of the substance above 100 °C. If heated above 100 °C water is lost and boric acid converts initially to metaboric acid (HBO2) and on further heating forms boric oxide (B2O3).
This result is supported by textbook-data (Kirk-Othmer Encyclopedia of Chemical Technology) which show the same results.
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.
