Question

is a water soluble ointment base.

• A. Soft paraffin
• B. Lanolin
• C. Wool fat
• D. Macrogol

Hint:

Macrogol = PEG = Polyethylene Glycol. It's the go-to "greaseless" water-soluble base.

Answer 1

The Correct Option is D

Step 1: Concept
Ointment bases are classified into four groups: Oleaginous, Absorption, Water-removable, and Water-soluble bases.

Step 2: Meaning
Water-soluble bases are completely greaseless and can be easily washed off with water.

Step 3: Analysis
Soft paraffin and wool fat are greasy/oleaginous. Macrogols (also known as Polyethylene Glycols or PEG) are synthetic polymers that are highly soluble in water and used as greaseless bases.

Step 4: Conclusion
Therefore, Macrogol is the correct example of a water-soluble ointment base.

Final Answer: (D)