Sesame oil does not require strict purification and refining, in fact it is a rare vegetable oil that can be used without refining. Crude sesame oil obtained by the press method often contains suspended meal particles, which can be removed by precipitation, separation or filtration. Crude sesame filtered crude oil produced by the factory also contains impurities such as phospholipids, resins, free fatty acids, and colored substances, and often requires full refining measures, using degumming, neutralization, decolorization, winterization, and deodorization processes.
Alkali refining of sesame oil can remove gum, free fatty acids and certain colored substances. Most vegetable oils need to be decolorized with decolorized clay, which makes the oil lighter. Deodorization is necessary for producing mild odor oils. Refined oils are usually heat treated at 200-250 ° C under vacuum conditions.
Sesame oil is highly stable and is used in medicine in many countries around the world. The high stability makes it a suitable carrier for subcutaneous or intravenous drugs. Several medicinal products use it as a solvent and carrier for estrogen drugs, and it is also used to moisturize the skin. When the oral dose is large, sesame oil can be used as a laxative. Sesame oil containing sesame acid and sesamelin is synergistic with insecticides such as pyrethrum and rotenone.