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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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: 235-721-1 | CAS number: 12612-50-9
Melting point / freezing point
Administrative data
Link to relevant study record(s)
- Endpoint:
- melting point/freezing point
- Type of information:
- other: collection of data
- Adequacy of study:
- key study
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- data from handbook or collection of data
- Qualifier:
- no guideline followed
- Principles of method if other than guideline:
- Not applicable - well documented technical information sheet, based on scientific literature.
- GLP compliance:
- no
- Type of method:
- other: no data
- Remarks on result:
- other: MoS2 has no melting point in air
- Conclusions:
- MoS2 has no melting point in air, as it oxidises to MoO3 when heated to above ca. 300 °C. The reaction is used on a commercial scale (at 500 - 600 °C) to convert MoS2 to technical MoO3. In the vacuum MoS2 dissociates to the elements from ca. 1000 °C.
Reference
MoS2 has no melting point in air, as it oxidises to MoO3 when heated to above ca. 300 °C. The reaction is used on a commercial scale (at 500 - 600 °C) to convert MoS2 to technical MoO3. In the vacuum MoS2 dissociates to the elements from ca. 1000 °C.
Description of key information
MoS2 has no melting point in air, as it oxidises to MoO3 when heated to above ca. 300 °C. The reaction is exothermic and used on a commercial scale (at 500 - 600 °C) to convert MoS2 to technical MoO3. In the vacuum MoS2 dissociates to the elements from ca. 1000 °C. Definitive melting points as reported in some factual handbooks and older literature are most likely incorrect.
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.
