Registration Dossier
Registration Dossier
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EC number: 235-650-6 | CAS number: 12411-64-2
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:
- study well documented, meets generally accepted scientific principles, acceptable for assessment
- Qualifier:
- equivalent or similar to guideline
- Guideline:
- OECD Guideline 102 (Melting point / Melting Range)
- Deviations:
- not specified
- Qualifier:
- equivalent or similar to guideline
- Guideline:
- EU Method A.1 (Melting / Freezing Temperature)
- Deviations:
- not specified
- Principles of method if other than guideline:
- Thermogravimetric measurements was performed in air at a heating rate of 3 °C/min. by an automatic thermobalance.
- GLP compliance:
- no
- Type of method:
- thermal analysis
- Decomposition:
- yes
- Decomp. temp.:
- > 287 - < 370 °C
- Conclusions:
- In the thermogravimetric studies by Ma (1964), different forms of ammonium octamolybdate showed only slighly different behaviour regarding decomposition. An endothermic peak relating to dehydration is observed at 287 °C. After continuous heating all ammonium is lost at 370 °C and ammonium octamolybdate is converted into molybdenum trioxide (MoO3).
Reference
In the thermogravimetric studies by Ma (1964), different forms of ammonium octamolybdate showed only slighly different behaviour regarding decomposition. Evolution of ammonia begins at ca. 200 °C. An endothermic peak relating to dehydration is observed at 287 °C . After continuous heating all ammonium is lost at 370°C and ammonium octamolybdate is converted into molybdenum trioxide (MoO3).
Description of key information
Decomposition (evolution of ammonia from ca. 200 °C, complete conversion to MoO3 at 370 °C).
Key value for chemical safety assessment
Additional information
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