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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:
2001
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
EU Method A.1 (Melting / Freezing Temperature)
Version / remarks:
1992
Deviations:
no
Qualifier:
according to guideline
Guideline:
OECD Guideline 102 (Melting point / Melting Range)
Version / remarks:
1995
Deviations:
no
GLP compliance:
yes
Type of method:
differential scanning calorimetry
Key result
Melting / freezing pt.:
70 °C
Atm. press.:
1 013 hPa
Decomposition:
no

The performed experiments resulted in a lot of thermal.events, which are difficult to interpret.

Melting of the test substance started at about 70"C (343 K). Probably reaction and or decomposition occurred at about 99°C - 105°C (372K- 378 K). The resultant more stable form of the test substance started to melt at about 120°C (393 K). Boiling of the test substance was not observed. Reaction or decomposition of the test substance started in the region 120°C - 330°C (393 K- 603 K).

Conclusions:
Melting of the test substance started at about 70"C (343 K). Probably reaction and or decomposition occurred at about 99°C - 105°C (372K- 378 K). The resultant more stable form of the test substance started to melt at about 120°C (393 K).

Description of key information

Melting of the test substance started at about 70"C (343 K). Probably reaction and or decomposition occurred at about 99°C - 105°C (372K- 378 K). The resultant more stable form of the test substance started to melt at about 120°C (393 K).

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:
70 °C

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