What is magmas in pharmacy?
Magmas are aqueous suspensions of insoluble inorganic drugs. Magmas are thick and viscous, and so there is no necessity of suspending agents except for Dihydroxyaluminum Aminoacetate Magma which contains suspending agents in addition to suitable preservatives and flavoring agents. …
What are gels and magmas?
If the gel contains small discrete particles, the gel is called a two-phase system. If the particle size in a two-phase system is large, the gel is referred to as a magma. Examples of two-phase systems include Aluminum Hydroxide Gel and Bentonite Magma.
What is bentonite magma?
Bentonite magma is volcanic ash that contains inactive silicate which is a type of salt.
What are the uses of magmas in pharmacy?
Bentonite magma is used to influence the stability of other pharmaceutical and cosmetic products. Bentonite stabilizes oil in water, and prevents separation even at high temperatures. This ensures uniform dosage in the case of pharmaceutical combinations such as calamine lotion, according to the U.S. Pharmacopoeia.
How will you prepare bentonite magma?
NF Monographs: Bentonite Magma. Sprinkle the Bentonite, in portions, upon 800 g of hot purified water, allowing each portion to become thoroughly wetted without stirring. Allow it to stand with occasional stirring for 24 hours. Stir until a uniform magma is obtained, add Purified Water to make 1000 g, and mix.
What are the 4 types of magma?
Because many of the properties of a magma (such as its viscosity and temperature) are observed to correlate with silica content, silicate magmas are divided into four chemical types based on silica content: felsic, intermediate, mafic, and ultramafic.
Which type of magma is most explosive?
Explosive eruptions are favored by high gas content & high viscosity magmas (andesitic to rhyolitic magmas). The explosive bursting of bubbles fragments the magma into clots of liquid that cool as they fall through the air.
What are the uses of gels and magmas?
GELS &MAGMAS GELS Gels are an excellent formulation for several routes of administration. They are useful as liquid formulations in oral, topical, vaginal, and rectal administration.
How to use magma as a suspending agent?
Use: As suspending agent for insoluble medicaments. Other Names: Magma Bismuthi; Milk of Bismuth; Bismuth Cream. Add the bismuth subnitrate to 60ml of purified water mixed with 60ml of nitric acid in a suitable container, agitate and warm gently until solution is effected.
What are some of the uses of magma?
Uses: Astringent, adsorbent and protective in the treatment of diarrheas and intestinal inflammation and ulceration. Other Names: Magma Magnesiae; Magnesium Hydroxide Mixture; Cream of Magnesia; Magnesia Magma USP XVI.
Which is the most common type of magma?
Three general types are recognized: Basaltic magma — SiO 2 45-55 wt%, high in Fe, Mg, Ca, low in K, Na Andesitic magma — SiO 2 55-65 wt%, intermediate. in Fe, Mg, Ca, Na, K Rhyolitic magma — SiO 2 65-75%, low in Fe, Mg, Ca, high in K, Na