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EC number: 252-552-9
CAS number: 35415-27-1
Two measurements were performed:
Starting temperature: 0 °C
Result pour point: -53.0 °C
Starting temperature: -40 °C
The freezing point (pour point, determined according to OECD 102 and
similar / equivalent to ASTM D 97) was determined to be -53.0 °C. Two
measurements were performed, one starting at the initial temperature of
0°C, the other starting at -40 °C as the initial temperature. Both
measurements had identical results (pour point -53.0 °C).
Pour point (ASTM D97): -53 °C
The pour point method was developed for use with petroleum oils and is
suitable for use with oily substances with low melting temperatures.
Because this applies to the test item, determination of the pour
point is the most relevant method here. As the sample is cooled at a
specific rate and examined at intervals of 3 K for flow characteristics
and the lowest temperature at which movement of the substance is still
observed is recorded as the pour point, it is actually a kind of
freezing point. The pour point was determined according to ASTM D 97
with -53 °C from duplicate measurements yielding identical results (OXEA,
In addition, the melting point for the submission substance was
determined by differential scanning calorimetry (DSC; Siemens, 2016).
According to this method, the test item is first cooled down well below
the freezing temperature and than heated up with a heating rate of 10
K/min up to 50 °C. An endothermal effect indicates melting. As such,
indentification of the melting temperature approaches phase transition
from the solid state temperature side by slowly increaing temperature,
whereas pour point determination starts from liquid state temperature
range to observe phase transition by stepwise decreasing temperature. As
such, depending on the substance type, results for pour point and
melting point may differ. This is indeed the case for the submission
substance: the melting point determined by DSC was 8.0 °C, based on two
experiments (7.91 °C measurement 1; 8.04 °C measurement 2).
This melting point is supported by a second study (Merieux, 2016),
yielding a melting point of 9.1 °C (DSC, n=1).
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