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All chocolate products contain 0.5% of lecithin (E322) or ammonium phosphatide (E 442). These emulsifiers are added to provide the right consistency of the chocolate, so it can be moulded into plates of chocolate, chocolate bars etc. If the chocolate has been stored at too high temperatures, its surface may appear dull or white. This is called bloom' which makes the product less attractive to the customer.
The emulsifiers will surround an oil (or other immiscible molecule) and form a protective layer so that the oil molecules cannot clump together. This action helps keeps the dispersed phase in small droplets and preserves the emulsion. An example of emulsifiers is oil dispersed into water.n emulsifier is a type of surfactant typically used to keep emulsion (mixtures of immiscible fluids) well dispersed. Emulsifiers typically have a hydrophobic (water-hating) and a hydrophilic (water-liking) end.