Page 12 - Saw Palmetto Technichal Info

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

This means freezing point for natural saw palmetto oil is around 13℃. When ambient
temperature is lower than 13℃, the oil will become turbid, precipitated or even freeze.
Due to quantity of oil in 200L is large, freezing process may take several days.
Saw palmetto oil stored in non-constant temperature warehouses in winter needs to be
paid special attention to the phenomenon that there is sedimentation at the bottom, but
the upper part is still an oily liquid. In this case, saturated fatty acids with a high
freezing point will precipitate, and some of the unsaturated fatty acids are still liquid.So
the oil taken from the top does not represent the quality of the entire package and this
results in the products don’t comply with the requirements for fatty acid content. At this
time, it is necessary to increase the ambient temperature to make the oil to liquid form
before use.

8. Heavy metals and Residual Solvents

Heavy metals and residual solvents are common contaminants. Hexane and petroleum
ether can also be used to extract saw palmetto oil, but there may be risk of solvent
residues. So we tested and compared them separately:

SN-180401 UV-171023 EE-1800628 Test Method
Pb Not Detected Not Detected Not Detected
Cd Not Detected Not Detected Not Detected
Heavy metal ICP-MS
Hg Not Detected Not Detected Not Detected
As Not Detected Not Detected Not Detected
Ethyl Acetate Not Detected 3.6 Not Detected
n-Heptane Not Detected Not Detected Not Detected
Residual solvents n-Hexane Not Detected Not Detected Not Detected GC-MS
n-Pentane Not Detected Not Detected Not Detected
Ethanol Not Detected 89.9 Not Detected
Table-6 Heavy Metals and residual solvents of various saw palmetto oils (ppm)

We are surprised that residues of ethanol and ethyl acetate are found in saw palmetto oil
of batch UV-171023. By CO2 supercritical extraction, it’s quite abnormal to test out
these two solvents in saw palmetto oil. The data should be discussed.

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