Registration Dossier
Registration Dossier
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EC number: 260-300-4 | CAS number: 56634-95-8
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:
- 6-13 Jan 1999
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 102 (Melting point / Melting Range)
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.1 (Melting / Freezing Temperature)
- Qualifier:
- according to guideline
- Guideline:
- EPA OPPTS 830.7200 (Melting Point / Melting Range)
- GLP compliance:
- yes
- Type of method:
- differential scanning calorimetry
- Melting / freezing pt.:
- 39.5 °C
- Atm. press.:
- ca. 1 013 hPa
Reference
Results:
Preliminary tests showed that the melting point of the sample was at
about 44-45 °C. In the 20-80 °C range, the melting point was determined
as the mean of two onset temperatures of the endothermic process
corresponding to the beginning of the solid/liquid transition phase:
39.9 and 39.0 °C.
The melting point of the purified test material was also measured
and it was as expected slightly higher (ca. 44 °C).
Description of key information
39.5 °C at ambient pressure (OECD 102, EU A.1, EPA OPPTS 830.7200)
Key value for chemical safety assessment
- Melting / freezing point at 101 325 Pa:
- 39.5 °C
Additional information
The melting point of the substance (technical grade) was determined using DSC method. The value obtained for a purified substance was slightly higher: 44.1 °C.
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