-Particle Size D50 is popular and very important in particle sizing.
-It is also known as the median diameter or the medium value of the particle size distribution, it is the value of the particle diameter at 50% in the cumulative distribution. It is one of an important parameter for representing particle size. For example, if D50=5.8 micrometer, then 50% of the particles in the sample are larger than 5.8 micrometer, and 50% smaller than 5.8 micrometer.