...Addition of emulgent systems on emulsions leads to the improvement in performance of the formulation, both from a money-making point of view, and a technical viewpoint. A combined emulgent system, rather than one emulgent whose HLB value is closest to the required HLB, usually gives a more stable interfacial film. Buffers can be included in the formulations for maintenance of chemical stabilities. Additionally, physiological compatibility, or control tonicity is also ensured with the addition of a second emulgent.
When electrolytes are added, the effects could be profound, especially, on the physical stability... Emulgents Emulgents – The Influence of Adding a Second Emulgent System on the Formulation...