What are function of each substance white ointment and minerals oil during preparation of zinc oxide?

Answer 1

In the preparation of zinc oxide ointment, white ointment and mineral oil serve distinct but complementary roles:

White Ointment

1. Base: White ointment, which is a type of hydrophilic ointment, serves as the primary base for the ointment formulation. It provides a semi-solid consistency and helps stabilize the formulation.
2. Moisture Retention: It creates a barrier on the skin surface, helping to retain moisture and protect the skin.
3. Emollient Properties: White ointment can help to soften and soothe the skin, making it beneficial for various dermatological uses.

Mineral Oil

1. Lubrication: Mineral oil acts as a lubricant, enhancing the spreadability of the ointment on the skin.
2. Medium for Dispersion: It aids in the dispersion of zinc oxide in the formulation, ensuring even distribution of the active ingredient throughout the ointment.
3. Hydrophobic Properties: Mineral oil can provide a water-repellent layer, which protects the skin from external irritants and is useful in formulations intended for barrier protection.

In summary, white ointment serves as the primary base that provides structure and moisture-retaining properties, while mineral oil enhances the texture, application, and protective qualities of the ointment formulation.