Question

Vanishing cream is an ointment that may be classified as:

• A. Water soluble base
• B. Oleaginous base
• C. Absorption base
• D. Emulsion base

Answer 1

The Correct Option is D

To determine the correct classification of vanishing cream, let's examine the properties and composition of different ointment bases.

1. Understanding Vanishing Cream:

Vanishing cream is a type of moisturizing cream that, when applied, appears to 'vanish' or be absorbed by the skin, leaving a matte finish. This property is due to its composition as an emulsion base, typically an oil-in-water (O/W) emulsion.

2. Analyzing the Options:

• Water Soluble Base: These bases dissolve in water. Examples include polyethylene glycol (PEG) ointment. Vanishing cream is not water soluble, so this is not the correct choice.
• Oleaginous Base: Also known as hydrocarbon bases, these are greasy and do not absorb into the skin easily. Vaseline is an example. Vanishing cream doesn't leave a greasy residue, indicating it's not an oleaginous base.
• Absorption Base: These bases can absorb water to form water-in-oil emulsions. They are typically greasy, unlike vanishing creams.
• Emulsion Base: Vanishing cream is usually an oil-in-water emulsion, which allows it to be absorbed quickly and leave a non-greasy feel, consistent with its name.

3. Conclusion:

The correct classification for vanishing cream is an emulsion base, specifically an oil-in-water type. This composition allows it to be absorbed easily and give a desirable matte finish.

Therefore, the answer is: Emulsion base.