Poly(methyl methacrylate), isotactic, is a stereoregular polymer valued for its enhanced mechanical properties, including higher tensile strength and impact resistance compared to atactic PMMA. The isotactic configuration imparts greater crystallinity, leading to improved thermal stability with a higher glass transition temperature, making it suitable for engineering applications in demanding environments such as automotive components, electronic housings, and machinery parts. It is also used in the production of durable films, coatings, and molded articles that require resistance to heat and chemicals. Due to its biocompatibility and stability, isotactic PMMA finds applications in medical devices, such as orthopedic implants and surgical instruments, where long-term performance is critical. This form is typically supplied as a powder for further processing into high-performance materials.