Classification of Emulsions: Pharmaceutics Notes, PDF
- Oil in Water O/W Type
- Water in Oil W/O Type
- Multiple Emulsions
- O/W/O
- W/O/W
- Macroemulsion
- Microemulsion
- Nanoemulsion
An emulsion is a type of colloidal mixture where normally immiscible liquids are combined in a way that maintains their unique chemical identities. In general, there are two parts of an emulsion:
Continuous Phase: the liquid portion of an emulsion in which another liquid is dispersed
Dispersed Phase: the liquid portion that forms tiny droplets that are evenly suspended throughout the continuous phase
The composition of the continuous and dispersed phases offer one way to classify emulsions.
| Oil in water emulsion(O/W) | Water in oil emulsion(W/O) |
| For O/W emulsion-water is the continuous phase and oil is the dispersed phase | For O/W emulsion-water is the continuous phase and oil is the dispersed phase |
| Less viscous and easily washable from the skin by water | More Viscous than O/W and not easily washable from the skin by water |
| Example- Vanishing cream | Example- Cold cream |
Biphasic Liquids: Suspension: Definition, advantages, and disadvantages, Classifications, Preparation of suspensions, Flocculated and Deflocculated suspension Emulsions: Definition, Advantages & Disadvantages, Classification, Emulsifying agent, Test for the identification of the type of Emulsion, Methods of preparation, Stability of emulsion
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