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EC number: 456-350-3 | CAS number: 878665-13-5
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:
- 14 November 2003
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Remarks:
- Method A1 of Commission Directive 92/69/EEC study. Purity and isomers composition specified.
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 102 (Melting point / Melting Range)
- Version / remarks:
- 27July1995.
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.1 (Melting / Freezing Temperature)
- Version / remarks:
- 92/69/EEC
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- other: BS4633: Determination of crystallizing point
- GLP compliance:
- yes (incl. QA statement)
- Remarks:
- Swiss GLP compliance programme (inspected on September 09 and 30, 2002/ signed on December 2002)
- Type of method:
- method to determine freezing temperature
- Specific details on test material used for the study:
- - Physical state: liquid
- Storage condition of test material: refrigerator (0-10°C) under nitrogen - Melting / freezing pt.:
- 19 °C
- Atm. press.:
- ca. 1 atm
- Decomposition:
- no
- Sublimation:
- no
- Executive summary:
The freezing point of the test substance was determined according to OECD/102/EU A1 guideline, using BS4633 method for the determination of crystallizing point.
The determination was carried out in duplicate, with seeding to initiate crystallisation.
A freezing temperature of 292 +/- 0.5K (19 +/- 0.5 °C) was determined for the test material.
Reference
Starting temperature: 294 K (det.1) and 298 K (det.2)
Individual measurements: (1) 292 K, (2) 292 K.
The test material remained unchanged until 288 K, then a crystal of test material was added to the supercooled liquid to initiate the crystallisation.
Transition occurs within accuracy limits, therefore freezing temperature will be expressed as a single value.
Description of key information
Freezing point is borderline to ambient temperature.
Key value for chemical safety assessment
- Melting / freezing point at 101 325 Pa:
- 19 °C
Additional information
A fully reliable experimental study on freezing point measurement, conducted according to a recognized OECD/EU/BS method and under GLP, is available. It is considered as a key study, the result is considered as key data.
As seeding was used to initiate crystallisation, the substance may be observed whether as a low melting solid, or a subcooled liquid.
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