Registration Dossier
Registration Dossier
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EC number: 231-953-2 | CAS number: 7782-40-3
Melting point / freezing point
Administrative data
- Endpoint:
- melting point/freezing point
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Reliability:
- 4 (not assignable)
Data source
Reference
- Reference Type:
- review article or handbook
- Title:
- Unnamed
- Year:
- 1 996
Materials and methods
Test guideline
- Qualifier:
- no guideline followed
- Principles of method if other than guideline:
- not available
- GLP compliance:
- not specified
- Type of method:
- other: unknown
Test material
- Reference substance name:
- Diamond
- EC Number:
- 231-953-2
- EC Name:
- Diamond
- Cas Number:
- 7782-40-3
- Molecular formula:
- C
- IUPAC Name:
- carbon
Constituent 1
Results and discussion
Melting / freezing point
- Melting / freezing pt.:
- ca. 4 000 K
- Atm. press.:
- ca. 130 other: kb
- Decomposition:
- yes
- Decomp. temp.:
- ca. 600 °C
- Remarks on result:
- other: Temperature Range for Stability (°C): Air 600°C / Vacuum (some O2) ca. 1400°C / Vacuum ca. 1700°C
Any other information on results incl. tables
Melting at Triple Point (130 kb, °K): 4000 °
Applicant's summary and conclusion
- Conclusions:
- Under atmospheric pressure, diamond is stable at temperatures up to 600°C. In the presence of oxygen diamond burns to form CO2 at temperatures of about 800°C. Diamond is metastable and in the absence of air is transformed to graphite at 1,700°C. The melting point of diamond at the triple point (130 kbar) is around 4000°K.
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