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EC number: 947-794-3 | CAS number: -
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
- 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)
- Principles of method if other than guideline:
- DTA/DSC
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- differential scanning calorimetry
- Key result
- Melting / freezing pt.:
- >= 40 - <= 90 °C
- Atm. press.:
- 1 013 hPa
- Decomposition:
- yes
- Remarks:
- The unsteady base line and inconstant thermal (approx. 230 °C and 450 °C) effects could be interpreted as decomposition (> 230 °C) of the test item.
- Conclusions:
- No definite melting point could be determined for HPP 12879-1. Two endothermic phases were visible between approx. 40 °C and approx. 90 °C indicating a large melting range.
- Executive summary:
A melting point study according to OECD 102 was performed using a Differential Thermal Analysis (DTA) / Differential Scanning Calorimetry (DSC).
No definite melting point could be determined for HPP 12879 -1. Two endothermic phases were visible between approx. 40 °C and approx. 90 °C indicating a large melting range.
Reference
Result:
No definite melting point could be determined.
In the closed crucible, two endothermic phases were visible between approx. 40 °C and approx. 90 °C indicating a large melting range.
This corresponds to the behaviour of the test item in the open crucible.
Conclusion:
Between 25 °C and 450 °C no definite melting could be observed. In the same temperature range no definite boiling point was detectable.
Two endothermic effects were visible between approx. 30 °C – 95 °C indicating a large melting range.
Between approx. 230 °C and 320 °C and approx. 330 °C and 450 °C further endothermic effects were observed. Since no steep endothermic signal could be detected there is no indication for a definite boiling point. The unsteady base line and inconstant thermal effects could be interpreted as decomposition of the test item.
The endothermic effects up to a temperature of 100 °C were verified in a second determination with reduced heating rate. The endothermic phases were likewise detected between approx. 40 °C and approx. 90 °C indicating a large melting range.
Melting range:approx. 40 – 90 °C
Description of key information
No definite melting point could be determined. Two endothermic phases were visible between approx. 40 °C and approx. 90 °C indicating a large melting range.
Key value for chemical safety assessment
- Melting / freezing point at 101 325 Pa:
- 40 °C
Additional information
As melting starts at 40 °C this value was taken as melting point for the CSA.
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