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Questions and Answers
What is the difference between cream and cold cream? Explain the emulsion base used in cold cream.
Cream is a semisolid dosage form containing drugs in a viscous emulsion base, while cold cream is a w/o emulsion with liquid paraffin as the continuous phase and water as the dispersed phase. In cold cream, the oil phase is poured into the aqueous phase to form a water-in-oil emulsion.
How does borax react with beeswax to produce borax soap? What kind of emulsion does it produce?
Borax reacts with beeswax to produce borax soap, which is an emulsifying agent. The reaction produces a w/o emulsion instead of the typical o/w emulsion.
How does the interfacial film agglomerating droplets reorientate to form water droplets of unusual shape at the inversion point? Why is rose oil added to cold creams?
At the inversion point, the interfacial film agglomerating droplets reorientates to form water droplets of unusual shape. Rose oil is used as a perfume in cold creams to mask odour and irritation. Cold creams are used by people with insufficient oily exudation from sebaceous glands to keep skin soft.
Study Notes
- Cream is a semisolid dosage form containing drugs in a viscous emulsion base.
- Cold cream is a w/o emulsion with liquid paraffin as the continuous phase and water as the dispersed phase.
- Cold cream is applied only on dry skin and is in great demand during cold seasons.
- Borax reacts with beeswax to produce borax soap, which is an emulsifying agent.
- The reaction produces a w/o emulsion instead of the typical o/w emulsion.
- During manufacturing, the oily phase is poured into the aqueous phase to form a water-in-oil emulsion.
- Agglomeration of oil droplets occurs, enclosing small quantities of water between them.
- At the inversion point, the interfacial film agglomerating droplets reorientates to form water droplets of unusual shape.
- Rose oil is used as a perfume in cold creams to mask odour and irritation.
- Cold creams are used by people with insufficient oily exudation from sebaceous glands to keep skin soft.
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Description
Test your knowledge about cold creams and emulsions with this quiz! From understanding the composition of creams to the manufacturing process and the role of specific ingredients such as borax and rose oil, this quiz covers it all. Dive into the world of semisolid dosage forms and learn about the unique properties of w/o emulsions. Whether you're a skincare enthusiast or a pharmacy student, this quiz is sure to challenge and educate you.
