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EC number: 946-615-6
CAS number: -
Security Pre-test for the DSC instrument
The lid of the crucible was bloated and at
the outside the crucible was contaminated with black-brown residue of
the test item. The weight was recorded with 35.48 mg after reaching 420
°C. The crucible was opened the residue appeared slightly darker and
smelled like a burnt candle. The second crucible was visual unchanged
after reaching 100 °C. The weight was recorded with 36.43 mg.
DSC Measurement of the Test Item
In all three performed measurements no event
could be detected in the cooling down phase.
In the heating up phase an endothermic
behaviour was detected. This event can be identified as a melting range.
onset / max* (°C)
Mass test item
First determination (fresh sample)
50.36 / 64.75
Second determination (same sample as 1st det.)
49.16 / 64.28
The crucible was opened after measurement and the test item was visually unchanged.
Third determination (fresh sample)
52.19 / 63.80
* Due to the shape of the endotherm, onset
values could only be determined for the second peak.
As the detected melting peaks were wide and
flat, with two discrete tops, and showed no sharp peak like the
reference indium, it makes more sense to state a range then using the
For UVCB substances it is quite usual to
have wide and flat peaks, and transition as a range is consistent with
the chemical nature.
The retained result is the minimum and
maximum of three independent determinations. However, it should be noted
that these results may vary slightly with the substance composition.
The melting point of the test substance was
determined, under GLP, according to OECD 102/EU A1 guideline, DSC
The substance was first cooled down to
-65°C, to evaluate if the substance is a true solid, or a very viscous
liquid. No event could be detected.
In the heating up phase, an endothermic
behaviour was detected and attributed to melting. Wide and flat peak
were recorded, with two discrete tops, so a melting range was retained,
also consistent with the UVCB nature of the substance.
The melting range of the test item was
determined to be between ca 25 and 72°C.
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