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EC number: 230-907-9 | CAS number: 7365-45-9
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:
- August 2012 - August 2013
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.1 (Melting / Freezing Temperature)
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 102 (Melting point / Melting Range)
- Deviations:
- no
- GLP compliance:
- yes
- Type of method:
- capillary method
- Key result
- Melting / freezing pt.:
- 212.6 °C
- Atm. press.:
- 1 013.25 hPa
- Decomposition:
- yes
- Decomp. temp.:
- ca. 211 °C
- Sublimation:
- no
- Conclusions:
- The mean melting temperature of the test item was determined to be 212.6 °C under decomposition.
- Executive summary:
A study was conducted according to OECD test guideline 102, Regulation (EC) No 440/2008 method A.1 and EPA OCSPP test guideline 830.7200 to determine the melting point of the test item using capillary method. At the start of the test at 205 °C the test substance was a white powder. The colour of the test substance changed to brown at about 211 °C. The test substance melted at 212.6 °C. Identical observations were made in the three samples. Thus it was concluded that the test item decomposed before and during melting. Decomposition was indicated by a significant change of colour at about 211 °C. The decomposed test substance melted at the 212.6 °C.
Reference
At the start of the test at 205 °C the test substance was a white powder. The colour of the test substance changed to brown at about 211 °C and started melting at about 212 °C.
The results of 3 repeated determinations of the melting temperature of the test substance were: 213.0, 212.9 and 211.9 °C. The mean melting temperature of the test item was 212.6 °C, with a standard deviation of 0.61. In each case the melted test substance appeared brown.
Description of key information
The mean melting temperature of the test item was determined to be 212.6 °C under decomposition.
Key value for chemical safety assessment
- Melting / freezing point at 101 325 Pa:
- 212.6 °C
Additional information
A study was conducted according to OECD test guideline 102, Regulation (EC) No 440/2008 method A.1 and EPA OCSPP test guideline 830.7200 to determine the melting point of the test item using capillary method. At the start of the test at 205 °C the test substance was a white powder. The colour of the test substance changed to brown at about 211 °C. The test substance melted at 212.6 °C. Identical observations were made in the three samples. Thus it was concluded that the test item decomposed before and during melting. Decomposition was indicated by a significant change of colour at about 211 °C. The decomposed test substance melted at the 212.6 °C.
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