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Physical & Chemical properties

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:
08 July 2010- 30 July 2010
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: This study has been performed according to OECD and EC guidelines and according to GLP principles.
Qualifier:
according to guideline
Guideline:
OECD Guideline 102 (Melting point / Melting Range)
Deviations:
no
Qualifier:
according to guideline
Guideline:
EU Method A.1 (Melting / Freezing Temperature)
Deviations:
no
GLP compliance:
yes (incl. QA statement)
Type of method:
differential scanning calorimetry
Key result
Melting / freezing pt.:
< -20 °C
Atm. press.:
ca. 1 017 hPa

Results      

Preliminary test

From 375°C upwards the weight of the sample decreased significantly. At 428°C the sample weight had decreased by 25%.

 

After the experiment a small brown residue remained in the sample container.

 

Main study                

During cooling as well as during heating, no effects were observed which were caused by crystallisation and/or melting. Between 350°C and 475°C an endothermic peak was observed which was due to boiling of the test substance. The extrapolated onset was determined to be 417.15°C.

 

During the second experiment the endothermic boiling peak was observed with an extrapolated onset of 417.44°C.

 

Additionally, the test substance was stored overnight in a -20°C freezer in order to determine if crystallization occurs. After storage the test substance had not been crystallized. From this it was concluded that the melting temperature is < -20°C (253K).

 


Conclusions:
The melting temperature of Decanoic acid, mixed esters with heptanoic acid, octanoic acid and trimethylolpropane was determined using DSC. The melting temperature of the test substance is < -20°C. The atmospheric pressure was 1017 ± 2 hPa.

Description of key information

Determined in accordance with OECD Guideline 102.  

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:
-20 °C

Additional information

The melting temperature of decanoic acid, mixed esters with heptanoic acid, octanoic acid and trimethylolpropane was determined using DSC. The melting temperature of the test substance is < -20°C. The atmospheric pressure was 1017 ± 2 hPa.