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EC number: 215-248-7 | CAS number: 1314-95-0
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)
- Version / remarks:
- adopted 1995
- Deviations:
- no
- GLP compliance:
- no
- Type of method:
- differential scanning calorimetry
- Key result
- Melting / freezing pt.:
- > 650 °C
- Atm. press.:
- 1 013 hPa
- Decomposition:
- yes
- Decomp. temp.:
- >= 650 °C
- Remarks on result:
- other: No melting point was determined prior to the decomposition and/or sublimation of the test item , starting at approx. 650°C
- Conclusions:
- No melting point was determined prior to the decomposition and/or sublimation of the test item, starting at approx. 650°C.
- Executive summary:
The DSC measurement was combined with a thermogravimetric (TG) measurement according to OECD Test Guideline 102 [adopted on 27 July 1995] and EU test method A.1 “Melting/freezing temperature“, Council Regulation (EC) No 440/2008 of 30 May 2008.
The heat flow curve shows a very small endothermic peak at 228°C (226°C extrapolated onset), which corresponds to the melting point of tin (230°C). Upon further heating a larger endothermic effect is registered starting at 747°C, with a peak maximum temperature at 858°C. Simultaneously to the endothermic heat flow, however, a significant mass loss is observed. After cooling down, the sample holder, the reference crucible as well as the sample crucible are covered with a grey precipitation (sample crucible inside and outside). Therefore the endothermic peak cannot be related to melting, but to decomposition and/or sublimation.
Reference
Description of key information
No melting point was determined prior to the decomposition and/or sublimation of the test item, starting at approx. 650°C.
Key value for chemical safety assessment
Additional information
No melting point was determined prior to the decomposition and/or sublimation of the test item, starting at approx. 650°C.
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