Sodium stearate or sodium octadecanoate, is the sodium salt of stearic acid. It is the major component of some types of soap. It is present in many types of solid deodorants, rubbers, latex paints, inks and accelerators. It is also a component of some food additives and food flavorings. In addition, It is also used in the pharmaceutical industry as a surfactant, to aid the solubility of hydrophobic compounds in the production of various oral dosage forms. It does this due to the molecule having both hydrophilic and hydrophobic nature. Sodium stearate molecules can form micelles, presenting their hydrophilic heads outwards and their hydrophobic tails inwards, providing a lipophilic environment for hydrophobic compounds to exist in.
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