Particle characterization is the process of analyzing and measuring the physical and chemical properties of particles, which can range from nanometers to millimeters in size. This includes assessing attributes such as size, shape, surface area, and composition. Techniques like scanning electron microscopy (SEM) and dynamic light scattering (DLS) are commonly used to obtain detailed information about particles in various fields, including pharmaceuticals and materials science. Understanding particle characteristics is crucial for applications like drug delivery, where the size and shape of particles can influence how they interact with biological systems. Accurate characterization helps researchers optimize formulations and improve product performance, ensuring safety and efficacy in applications ranging from cosmetics to food science.