Registration Dossier
Registration Dossier
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EC number: 692-731-2 | CAS number: 76950-43-1
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:
- 18 Feb-15 Apr 2014
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.1 (Melting / Freezing Temperature)
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 102 (Melting point / Melting Range)
- Qualifier:
- according to guideline
- Guideline:
- EPA OPPTS 830.7200 (Melting Point / Melting Range)
- GLP compliance:
- yes (incl. QA statement)
- Remarks:
- GLP Compliance Monitoring Program, Health Care Inspectorate, Ministry of Health, Welfare and Sport, Den Haag, The Netherlands
- Type of method:
- other: differential scanning calorimetry
- Melting / freezing pt.:
- 44 °C
- Atm. press.:
- 1 015 hPa
- Decomposition:
- no
Reference
Preliminary test
Starting at 200 °C, the weight of the sample decreased significantly. At 269 °C the sample weight had decreased by 25%.
Main study
Experiment 1: An endothermic peak between 25 °C and 75 °C was observed. The extrapolated onset temperature of the peak could not be determined because of the decreasing baseline just before this peak. The effect was most likely obtained due to melting of the test substance.
Experiment 2: The extrapolated onset temperature of the observed endothermic peak was 43.88 °C. The effect was most likely obtained due to melting of the test substance.
Experiment 3: A repeated heating cycle was applied. During the first heating an endothermic peak was observed with an extrapolated onset temperature of 44.35 °C. In the cooling cycle an exothermic peak was observed between 0 °C and -50 °C. The effect was obtained due to cristallization of the test substance. During the second heating an extrapolated onset temperature of 39.33 °C was observed. The results demonstrated that the endothermic effect was due to melting of the test substance.
Experiment 4: A hermetic sealed sample pan was used. The extrapolated onset temperature of the melting peak was 44.31 °C.
The melting temperature was determined as the average melting temperature obtained from experiments 2 to 4.
Description of key information
44 °C at 1015 hPa (EU A.1, OECD 102, OPPTS 830.7200; DSC method)
Key value for chemical safety assessment
- Melting / freezing point at 101 325 Pa:
- 44 °C
Additional information
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
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