Some substances such as sulfur and hydrocortisone are both insoluble in water and poorly wetted by it. When preparing simple aqueous dispersions, it is difficult to disperse clumps and the foam produced on shaking is slow to subside because it is stabilized by the film of unwettable solid at the liquid–air interface. To ensure satisfactory…
Learning Objective Suspensions Containing Diffusible Solids The method of preparation of suspensions containing diffusible solids is as follows: Suspensions Containing Indiffusible Solids The thickening agents used in indiffusible suspensions are given below: Suspensions Containing Precipitate-forming Liquids Liquid preparations containing resinous matter when mixed with water show precipitation of resin, which sticks to the sides of…
Learning Objective The formulation of a suspension involves the following:
Learning Objective
Learning Objective The suspensions are said to be flocculated when the individual particles are in contact with each other to form loose aggregates or a network-like structure. They are easily redispersible, but the rate of sedimentation is fast, the product will look inelegant and there is also a danger of an inaccurate dose being administered.…
Based on Type of Solids Learning Objective