Hydroxypropyl Methylcellulose (HPMC) is a versatile cellulose ether widely used in various industries, including construction and pharmaceuticals. Selecting the appropriate HPMC grade is crucial for achieving optimal performance in applications such as dry-mix mortars and pharmaceutical formulations. This guide explores key factors to consider when choosing the right HPMC grade for your project, focusing on viscosity ranges, gel temperature variations, and methoxyl/hydroxypropyl content.