Page 12 - Technical Saw Palmetto Booklet

MTC Industries, Inc.
Herbsine Bioengineering Co., Ltd.

8. Cloud point, Pour point and Freezing point

When the ambient temperature is lower than 15°C, saw
palmetto oil begins to solidify, this causing serious
problems to the soft capsule manufacturers in the northern
hemisphere. This means the saw palmetto oil, which isn’t
taken insulation measures from November to next March
every year, will partially or completely freeze.
Even worse, some unexperienced trading companies or
users consider solidified saw palmetto oil to be
problematic.
The freezing point of vegetable oil is mainly determined by
the ratio of saturated fat to unsaturated fat in the oil.
Unfortunately, saw palmetto oil contains more than 50%
saturated fatty acids and has a much higher freezing point
than common vegetable oils. In addition, the freezing point
of oil is not a certain temperature but a range. It will begin
to appear a little floc from a certain temperature, but not all
freeze.
According to our experience, when the temperature is
below 15°C, saw palmetto oil is no longer clear and
transparent. Gradually, there are more and more
precipitates and the oil to become turbid, which is called
cloud point. When the oil can’t flow, it is called pour point.
Finally, the oil is completely transformed into a solid state.

Take 10 g sample of each saw palmetto oil. After testing,
sample placed at 13℃ for more than 20 minutes, all sample begin to turbid till
completely freeze. Color for sample UV-171023 is very dark, the turbidity is not
obvious, but it still freezes.

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