We plant the good varity at the most content oil of castor beans.<br/><br/>Castor oil is a vegetable oil obtained from the castor bean (or preferably castor seed as the castor plant, ricinus communis, is not a member of the bean family<br/>Castor oil has an unusual composition and chemistry, which make it quite valuable. Ninety percent of fatty acids in castor oil are ricinoleic acid. Ricinoleic acid, a monounsaturated,18-carbon fatty acid, has a hydroxyl functional group at the twelveth carbon, a very uncommon property for a biological fatty acid. This functional group causes ricinoleic acid (and castor oil) to be unusually polar, and also allows chemical derivitization that is not practical with other biological oils. Since it is a polar dielectric with a relatively high dielectric constant (4.7), highly refined and dried castor oil is sometimes used as a dielectric fluid within high performance high voltage capacitors.<br/><br/>Castor oil maintains its fluidity at both extremely high and low temperatures. Sebacic acid is chemically derived from castor oil. Castor oil and its derivatives have applications in the manufacturing of soaps, lubricants, hydraulic and brake fluids, paints, dyes, coatings, inks, cold resistant plastics, waxes and polishes, nylon, pharmaceuticals and perfumes.