What are ointment bases in pharmacy?

What are ointment bases in pharmacy?

There are three major types of ointment bases: oleaginous (greasy) bases, which are water repellent; water-absorbing bases, which are greasy but allow absorption of water, and water-miscible bases (vanishing creams or water-soluble bases). …

What are the ointment bases explain with example?


Oleaginous Ointment Bases Water/Oil Emulsion Ointment Bases
Examples White Petrolatum, White Ointment Cold Cream type, Hydrous Lanolin, Rose Water Ointment, Hydrocream™, Eucerin®, Nivea®

How do you make an ointment base?

Procedure for Preparation:

  1. Melt the stearyl alcohol and white petrolatum on a hot plate.
  2. Heat this mixture to 70°C.
  3. Dissolve remaining ingredients in water and heat the solution to 70° C.
  4. Add the oleaginous phase slowly to the aqueous phase, stirring constantly.
  5. Remove from heat and stir the mixture until it congeals.

What are the ointment bases give their types?

An ointment base forms the body of any ointment. Ointment bases are classified into four general groups: (1) hydrocarbon bases, (2) absorption bases, (3) emulsion or water-removable bases, and (4) water-soluble bases (Table 23.1).

What are the types of ointment?

There are four general classes of ointments: Hydrocarbon bases (oleaginous ointment bases) which keep medications in contact with the skin and can act as a moisturizer….What Are Ointments?

  • Petroleum jelly.
  • Anhydrous lanolin.
  • Waxes.
  • Vegetable oils.
  • Lard.

How are ointment classified?


What is ointment base made of?

Typical ointment bases comprise petrolatum and mineral oil, or petrolatum and waxy/fatty alcohol combinations, the ratio and grades of these components being selected to give the desired finished product viscosity/spreadability.

What are the requirement of ointment bases?

The ointment base needs to be heated to above its melting temperature prior to the addition of the other ingredients. Low-shear or mixing speeds are typically used when the ointment base or finished formulation is cold/thick.

What is emulsion base?

An emulsion is a mixture of two or more liquids that are normally immiscible (unmixable or unblendable) owing to liquid-liquid phase separation. Emulsions are part of a more general class of two-phase systems of matter called colloids.

What is lanolin in?

Lanolin oil is a secretion from sheep’s skin. This conditioning property is why the substance is now widely used in human cosmetics, skin care, and hair products. Lanolin oil is extracted by putting sheep’s wool through a centrifuge machine that separates the oil from other chemicals and debris.

What is an ideal ointment base?

The ointment base is that substance or part of an ointment preparation which serves as carrier or vehicle for the medicament. An ideal ointment base should be inert, stable, smooth, compatible with the skin, non-irritating and should release the incorporated medicaments readily.

What are oleaginous ointment bases?

Oleaginous bases :-. It is consists of oil and fat.

  • Absorption bases :-. • Example:- wool fat ( anhydrous lanolin) absorbed 50% of water its own weight.
  • Water miscible bases :-. • They are miscible with an excess of water ointment made from water miscible bases are easily remove after use.
  • Water soluble bases :-.
  • Is ointment a solid?

    An ointment is a homogeneous, viscous, semi-solid preparation, most commonly a greasy, thick oil (oil 80% – water 20%) with a high viscosity, that is intended for external application to the skin or mucous membranes. Ointments have a water number that defines the maximum amount of water that they can contain.

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