Corn oil (maize oil) is oil extracted from the germ of corn (maize). Its main use is in cooking, where its high smoke point makes refined corn oil a valuable frying oil. It is also a key ingredient in some margarines. Corn oil is generally less expensive than most other types of vegetable oils. Corn oil is also a feedstock used for biodiesel. Other industrial uses for corn oil include soap, salve, paint, erasers, rustproofing for metal surfaces, inks, textiles, nitroglycerin, and insecticides. It is sometimes used as a carrier for drug molecules in pharmaceutical preparations. Almost all corn oil is expeller-pressed, then solvent-extracted using hexane or 2-methylpentane (isohexane).[1] The solvent is evaporated from the corn oil, recovered, and re-used. After extraction, the corn oil is then refined by degumming and/or alkali treatment, both of which remove phosphatides. Alkali treatment also neutralizes free fatty acids and removes color (bleaching). Final steps in refining include winterization (the removal of waxes), and deodorization by steam distillation of the oil at 232-260 C (450-500 F) under a high vacuum.
Chemical Specifications Parameters Specific Gravity at 25 C 0915-0922 Refractive Index at 25 �° C 1.47-1474 Iodine number 103-128 Free fatty acid <0.1% Moisture 0.0% Max Appearance Crisp and vibrant Smell and taste Odorless, odorless and soft Corn oil (maize oil) is oil extracted from the germ of corn (maize). Its main use is in cooking, where its high smoke point makes refined corn oil a valuable frying oil. It is also a key ingredient in some margarines. Corn oil is generally less expensive than most other types of vegetable oils. Corn oil is also a feedstock used for biodiesel. Other industrial uses for corn oil include soap, salve, paint, erasers, rustproofing for metal surfaces, inks, textiles, nitroglycerin, and insecticides. It is sometimes used as a carrier for drug molecules in pharmaceutical preparations. Almost all corn oil is expeller-pressed, then solvent-extracted using hexane or 2-methylpentane (isohexane).[1] The solvent is evaporated from the corn oil, recovered, and re-used. After extraction, the corn oil is then refined by degumming and/or alkali treatment, both of which remove phosphatides. Alkali treatment also neutralizes free fatty acids and removes color (bleaching). Final steps in refining include winterization (the removal of waxes), and deodorization by steam distillation of the oil at 232 260 C (450-500 F) under a high vacuum.
SPECIFICATION FOR CORN OIL Physical and Chemical Analysis: Free Fatty Acid (% m/m Oleic Acid): 0,3 g maximum. Acid Number (mg KOH/g oil): 0,6 maximum. Peroxide Value (meq O2/kg oil): 10,0 maximum. Iodine Value (WIJS Method): 103 - 135 Moisture: 0,2 maximum. Volatile Matter (% m/m at 105oC): 0,2 maximum. Saponification Value (mg KOH/g oil): 187 - 195 Unsaponifiable Substances (g/kg): 2,8 maximum. Insoluble Substances in Ether (%): 0,05 maximum. Refractive Index (at 40oC): 1,465 - 1,468 Specific Gravity (g at 20oC): 0,917 - 0,925 Soap Content (% m/m): 0,005 maximum. Halphen Test: Negative. Mineral Oil Test: Negative. Sesame Oil Test: Negative. Cold Test (5,5 hours at 0oC): Clear.
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