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Melting point / freezing point

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Reference
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.:
>= 213 - <= 240 °C
Atm. press.:
1 013.25 hPa
Decomposition:
yes
Decomp. temp.:
210 °C
Sublimation:
no

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 210 °C and to dark brown at about 240 °C. The test substance melted in the range of 213 to 240 °C. No further changes were observed until the end of the test at 245 °C. The test item decomposed before and during melting. Decomposition was indicated by a significant change of colour at about 210 °C. The decomposed test substance melted in the range of 213 to 240 °C.

Conclusions:
The test item decomposed before and during melting. Decomposition was indicated by a significant change of colour at about 210 °C. The decomposed test substance melted in the range of 213 to 240 °C.
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 210 °C and to dark brown at about 240 °C. The test substance melted in the range of 213 to 240 °C. No further changes were observed until the end of the test at 245 °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 210 °C. The decomposed test substance melted in the range of 213 to 240 °C.

Description of key information

The test item decomposed before and during melting. Decomposition was indicated by a significant change of colour at about 210 °C. The decomposed test substance melted in the range of  213 to 240 °C (reference 4.2 -1).

Key value for chemical safety assessment

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 the capillary method (reference 4.2 -1). 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 210 °C and to dark brown at about 240 °C. The test substance melted in the range of 213 to 240 °C. No further changes were observed until the end of the test at 245 °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 210 °C. The decomposed test substance melted in the range of 213 to 240 °C.