What are oleaginous bases?
Oleaginous bases :- It is consists of oil and fat. It is anhydrous non- washable and do not absorb water. Liquid paraffin :- It is a mixture of liquid, hydrocarbon obtained from petroleum.
What is example of ointment base?
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. Proprietary ointment bases are also available (e.g., Ointment Base No.
What is an example of ointment?
Ointments used for medical purposes contain medications that can either act on the skin or be absorbed through the skin for systemic action. Common bases for ointments include: Petroleum jelly. Anhydrous lanolin.
What is an absorption base?
An absorption base is an oleaginous composition containing an emulsifier or emulsifiers such that the composition is capable of absorbing water to form an emulsion of the water-in-oil type. It may be used as all or a part of the oleaginous material of an emulsion suitable for cosmetics, ointments, etc.
What is the difference between oleaginous base and absorption base?
Absorption bases contain an oleaginous material and a water-in-oil (w/o) emulsifier so that they can absorb water to form or expand w/o emulsions. Absorption bases are useful as emollients, although they do not provide the degree of occlusion afforded by the oleaginous bases.
Is hydrophilic ointment oleaginous?
These bases, which are known also as “oleaginous ointment bases,” are represented by White Petrolatum and White Ointment. Such bases are oil-in-water emulsions, e.g., Hydrophilic Ointment, and are more correctly called “creams.” (See Creams.)
What are 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).
Is ointment an emulsion?
Summary. This chapter talks about pharmaceutical emulsions products such as creams and ointments. The use of emulsions is very often associated with their therapeutic use as creams and ointments. Oil-in-water (O/W) types are by far the most common and well-tolerated.
Which base is used for preparation of eye ointment?
Ointment bases Wool wax alcohol and amerchol L-101 are the most important [21,23].
Which is the example of absorption base?
Examples of absorption bases are anhydrous lanolin and hydrophilic petrolatum.
Is white petrolatum an example of an anhydrous absorption base?
Example: White Petrolatum, White Ointment Oleaginous O.B. Anhydrous but hydrophilic ointment bases, they can absorb several times their weight of water to form water-in-oil emulsion.
Is glycerin a levigating agent?
It is generally recommended to use an amount of wetting agent that is equal to the amount of powder being levigated. Glycerin USP is the preferred wetting agent for vaginal preparations or other formulations where more moisturization is needed.