Hydroxypropyl Methylcellulose (HPMC) is commonly used in liquid formulations such as suspensions and emulsions, where it acts as an emulsifying and stabilizing agent. It ensures homogeneity and stability by preventing the coalescence of particles, enabling even distribution and consistent dosing. Its ability to form colloidal dispersions enhances the physical stability of intermediates during processing, making it an essential additive in the production of APIs or other downstream products.