Registration Dossier
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EC number: 232-197-6 | CAS number: 7790-28-5
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:
- 23 April 2012 - 29 June 2012
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 102 (Melting point / Melting Range)
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.1 (Melting / Freezing Temperature)
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- differential scanning calorimetry
- Key result
- Decomposition:
- yes
- Decomp. temp.:
- ca. 270 °C
- Conclusions:
- The test material has been determined to decompose from approximately 270 °C (543 K). Due to this decomposition, no value for melting temperature could be determined.
- Executive summary:
The melting point of the test material was evaluated by differential scanning calorimetry (DSC) using a procedure designed to be compatible with OECD Guideline 102 and EU Method A.1 under GLP conditions.
The test material has been determined to decompose from approximately 270 °C (543 K). Due to this decomposition, no value for melting temperature could be obtained.
Reference
As a low rate of enthalpy change was seen during the initial stages of decomposition, the onset temperature can only be approximated.
Although the test material was determined to decompose before melting, the sample was heated to 400 °C and remained as a white solid.
Description of key information
The test material has been determined to decompose from approximately 270 °C (543 K). Due to this decomposition, no value for melting temperature could be obtained.
Key value for chemical safety assessment
- Melting / freezing point at 101 325 Pa:
- 270 °C
Additional information
The melting point of the test material was evaluated by differential scanning calorimetry (DSC) using a procedure designed to be compatible with OECD Guideline 102 and EU Method A.1. It was assigned a reliability score of 1 in accordance with the principles for assessing data quality as detailed by Klimisch et al (1997).
The test material has been determined to decompose from approximately 270 °C (543 K). Due to this decomposition, no value for melting temperature could be obtained.
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