Registration Dossier
Registration Dossier
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EC number: 412-260-6 | CAS number: 52658-19-2 MONO 442
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:
- May 03, 2004
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.1 (Melting / Freezing Temperature)
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 102 (Melting point / Melting Range)
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- thermal analysis
- Key result
- Atm. press.:
- 101.325 kPa
- Decomposition:
- yes
- Decomp. temp.:
- ca. 250 °C
- Remarks on result:
- other: No melting observed below decomposition temperature.
- Conclusions:
- Under the study conditions, the glass transition temperature was evaluated as -42°C (231 K). Reaction or decomposition of the test substance started in the temperature range 250°C – 251°C (523 K – 524 K).
- Executive summary:
A study was conducted to determine the melting point of the test substance according to OECD Guideline 102 and EU Method A.1. The test substance is a viscous liquid at room temperature. It does not crystallize upon cooling, but it forms a glassy state. On heating, the test substance transfers from the glassy state to the (supercooled) liquid state. Melting (i.e. transition from crystalline state to liquid state) is therefore not observed for this test substance. The glass transition region of the test substance was from -45°C to -33°C (228 K to 240 K). Under the study conditions, the glass transition temperature was evaluated as -42°C (231 K). Reaction or decomposition of the test substance started in the temperature range 250°C – 251°C (523 K – 524 K) (van der Baan-Treur, 2004).
Reference
Reaction or decomposition of the test substance started in the temperature range 250°C – 251°C (523 K – 524 K).
Description of key information
The melting point was determined according to OECD Guideline 102 and EU Method A.1 (van der Baan-Treur, 2004).
Key value for chemical safety assessment
- Melting / freezing point at 101 325 Pa:
- -42 °C
Additional information
The melting point was evaluated as the glass transition temperature.
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