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EC number: 252-046-8
CAS number: 34455-29-3
In the trial determination using
the metal block method, the test substance partially melted between room
temperature and approximately 50˚C, but was not fully molten by the time
the sample appeared to decompose at approximately 150˚C as evidenced by
rapid evolution of gas and expansion up the melting capillary.
From the DSC trace, a broad
endotherm was observed below 100˚C, in agreement with the initial
melting seen in the metal block test, and this was followed from
approximately 150˚C by a series of exotherms indicating decomposition.
A study was performed to determine
the melting temperature of the test item according to EC Method A.1 and
OECD Method 102. The melting temperature was determined using the metal
block method and differential scanning calorimetry (DSC). The melting
temperature was initially examined using the metal block method. The
waxy test substance was ground in the presence of liquid nitrogen to
facilitate packing into a capillary tube to a height of 3 mm. In a trial
determination, the capillary tube was placed in the apparatus and heated
at 10°C/minute. As the melting temperature was indeterminate using the
metal block method, DSC was subsequently performed in a nitrogen
atmosphere at a heating rate of 5°C/minute.
The test item was determined to
partially melt before decomposing at temperatures above approximately
Test substance partially melted before decomposing at temperatures above approximately 150°C
OECD Guideline 102
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