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EC number: 619-799-8 | CAS number: 66309-83-9
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:
- 29 Jul - 24 Aug 2005
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 102 (Melting point / Melting Range)
- Version / remarks:
- 1995
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.1 (Melting / Freezing Temperature)
- Version / remarks:
- 67/548
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- differential scanning calorimetry
- Remarks:
- The crucible is heated at a constant heating rate (10 K/min). The measurement is carried out in a defined atmosphere (nitrogen). The amount of heat absorbed or released is measured and recorded. Aluminum crucibles with a small bore are used as containers.
- Key result
- Melting / freezing pt.:
- 8.5 °C
- Atm. press.:
- 1 013.3 hPa
- Conclusions:
- The melting point of the test item at atmospheric pressure is 8.5 °C.
- Executive summary:
The study was performed to assess the melting point. The study was conducted in accordance with EEC Method for "determination of the melting point", Directive 67/548/EEC, method A.1 which is in most parts equivalent to the OECD Guideline for Testing of Chemicals No. 102. The melting point of the test substance is 8.5 °C (1013 hPa).
Reference
Validity criteria for the measurement of the melting point:
| Target condition according to guideline: | Actual condition according to the study: | Validity criteria met: |
| The heating rate should not exceed 2 K/min. | Heating rate 0.25 K/min. | Yes |
| The mean of at least two measurements which are in the range of the estimated accuracy (± 0.5 K up to 600 K for this method) is reported as the melting temperature. | Mean of two measurements were reported 8.23 °C and 8.82 °C which are in the range of ± 0.5 °C. | Yes |
| If the substance decomposes or sublimes before the melting temperature is reached, the temperature at which the effect is observed shall be reported. | The test substance does not decompose or sublimate. | Yes |
Description of key information
The study was performed to assess the melting point. The study was conducted in accordance with EEC Method for "determination of the melting point", Directive 67/548/EEC, method A.1 which is in most parts equivalent to the OECD Guideline for Testing of Chemicals No. 102. The melting point of the test substance is 8.5 °C (1013 hPa).
Key value for chemical safety assessment
- Melting / freezing point at 101 325 Pa:
- 8.5 °C
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