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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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.
Use of this information is subject to copyright laws and may require the permission of the owner of the information, as described in the ECHA Legal Notice.
EC number: 701-475-3 | CAS number: -
Melting point / freezing point
Administrative data
Link to relevant study record(s)
- Endpoint:
- melting point/freezing point
- Type of information:
- read-across based on grouping of substances (category approach)
- Adequacy of study:
- key study
- Justification for type of information:
- All members of the category ‘Lithium salts of the oxyacids of boron (B)’ are formed in situ and are immediately formulated into grease thickeners which are marketed and used within the EU/EEA. Dilithium tetraborate is the only member to be manufactured and isolated in an available form for testing. All other members are not isolated and would require extraction from the grease thickener products for testing to be conducted on the isolated substance itself. As testing requires a substantial quantity of material, it was decided to perform the testing on the only isolated product, dilithium tetraborate for this category approach.
All of the substances in this category are inorganic lithium salts of boric acid and are solid at ambient temperature and are expected to have similar high melting points of >500 °C. The melting point of dilithium tetraborate was reported as >500 °C, while the CRC Handbook reports the melting point of lithium metaborate as 849°C. Any variations due to the range of trigonal and tetrahedral species between the substances are not expected to lead to any changes in the melting point. A result of >500 °C is therefore expected for Reaction products of boric acid and lithium hydroxide; read-across to the data for dilithium tetraborate is therefore proposed. - Key result
- Melting / freezing pt.:
- > 500 °C
- Conclusions:
- The melting point of Reaction products of boric acid and lithium hydroxide is expected to be >500 °C.
- Executive summary:
The melting point of dilithium tetraborate was determined to be >500 °C in an OECD 102. As Reaction products of boric acid and lithium hydroxide is also an inorganic borate substance it is expected to have a similar high melting point of >500 °C. A high melting point is consistent with the data reported in the CRC handbook for lithium metaborate (849 °C).
Reference
Description of key information
The melting point of dilithium tetraborate was determined to be >500 °C in an OECD 102. As Reaction products of boric acid and lithium hydroxide is also an inorganic borate substance it is expected to have a similar high melting point of >500 °C. A high melting point is consistent with the data reported in the CRC handbook for lithium metaborate (849 °C).
Key value for chemical safety assessment
- Melting / freezing point at 101 325 Pa:
- 500 °C
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.
