Oil-in-water emulsions are non-greasy and easily removable from the skin surface while water-in-oil emulsions are greasy and not water washable. In an oil-in-water (o/w) emulsions, the dispersed phase (discontinuous or internal phase) phase is oil, and the dispersion medium (continuous or external phase) is water while in a water-in-oil (w/o) emulsions the water is the dispersed phase, and oil the dispersion medium.Ģ. Differences between oil-in-water emulsion and water-in-oil emulsionġ. This article focuses on the differences between oil-in-water emulsion and water-in-oil emulsion. Ex: Butter ,salad dressings Oil in water type (O/W) : An emulsion is referred to as oil in water ,if the dispersed phase is oil and the continuous phase is aqueous base. Pharmaceutical emulsions are currently used internally for the administration of nutrients, drugs, and diagnostic agents. Vignan Pharmacy College 34 Water in oil type (W/O): An emulsion is referred as water in oil, if the dispersed phase is water and the continuous phase is oil. Emulsion or water-removable bases are oil-in-water (o/w) emulsions. Emulsion or water-removable bases and creams. It contains urea as the active ingredient and is used to help rehydrate dry, scaly skin. Crema on espresso is an emulsion consisting of water and coffee oil. Egg yolk is an emulsion containing the emulsifying agent lecithin. The oil will form drops and disperse throughout the water. Very frequently emulsions are used in cosmetic products as topical vehicle for dermal application since they have high patient/consumer acceptance. For example, Eucerin cream is a w/o emulsion of petrolatum, mineral oil, mineral wax, wool wax, alcohol, and bronopol. Oil and water mixtures are emulsions when shaken together. Emulsions have been widely used in many areas of application: in industries, agriculture, food technologies, pharmaceutics, and cosmetics. When water and oil are mixed vigorously (i.e., whipped, stirred, and shaken), the oil. An emulsion is a dispersion of at least two immiscible liquids, one of which is dispersed as droplets in the other liquid, and stabilized by an emulsifying agent. An o/w emulsion will be used as an example of how an emulsion is formed. Pharmaceutical Emulsions (Dr.) Mirza Salman Baig Assistant Professor (Pharmaceutics) AIKTC, School of Pharmacy,New Panvel Affiliated to University of Mumbai (INDIA) 2 Definition: An emulsion is a thermodynamically unstable system containing mixture of two or more immiscible liquids which is stabilized by adding emulsifying agent Emulsion.
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