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EC number: 203-733-6
CAS number: 110-05-4
Accuracy check DSC
The measured values for Indium are mentioned
- onset temperature : 156.48°C
- enthalpy of melting : 28.55 J/g
The measured values are within the
Test method 1:
Thermal analysis method
The DSC curve of the measurement is shown in
the report. No heat peak was measured. This means that the substance did
not solidify or crystallize during the cooling step to -50°C, and
consequently did neither melt during the heating step back to 20°C. This
means that the melting point could not be determined with this method.
Test method 2:
Method for determination of the freezing
Cooling was done in seven steps from 0°C to
The appearance of the sample at each
temperature level is mentioned below.
- at 0°C : clear liquid, thin fluid
- at -5°C : clear liquid, thin fluid
- at -10°C : clear liquid, thin fluid
- at -15°C : clear liquid, thin fluid
- at -20°C : clear liquid, thin fluid
- at -25°C : clear liquid, thin fluid
- at -29°C : clear liquid, thin fluid
The freezing point of di-tert-butyl peroxide
was determined according to OECD guideline 102. Two methods were used
for the determination of the melting/freezing point, a thermal analysis
method (Differential Scanning Calorimetry, DSC) and a method for the
determination of the freezing temperature. The first method is based on
ASTM E537-07 and the second on ISO 1392. Both methods are mentioned in
the list of standards of Guidelines EC A.1 and OECD 102.
No crystallization or freezing was observed.
Also the temperature profile did not show any indication of
crystallization or freezing. Since the substance remained liquid in the
temperature range from 0°C to -29°C, it can be concluded that the
melting/freezing point of di-tert-butyl peroxide is below -29°C.
Di-tert-butyl peroxide has a freezing point lower than -29°C.
This data is supported by one old report and
five literature endpoints.
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