Lanolin is an example of which emulsion type?

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Multiple Choice

Lanolin is an example of which emulsion type?

Explanation:
Lanolin is a lipid-rich, waxy substance that is not soluble in water. In topical formulations, this type of oily material forms emulsions with water droplets dispersed within it, meaning water-in-oil is the system. The oil is the continuous phase and the dispersed phase is water, which gives an occlusive, emollient feel typical of W/O emulsions used in ointments. In contrast, an oil-in-water system would have oil droplets dispersed in water and would be less occlusive and more readily washed off. So lanolin exemplifies a water-in-oil emulsion.

Lanolin is a lipid-rich, waxy substance that is not soluble in water. In topical formulations, this type of oily material forms emulsions with water droplets dispersed within it, meaning water-in-oil is the system. The oil is the continuous phase and the dispersed phase is water, which gives an occlusive, emollient feel typical of W/O emulsions used in ointments. In contrast, an oil-in-water system would have oil droplets dispersed in water and would be less occlusive and more readily washed off. So lanolin exemplifies a water-in-oil emulsion.

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