What is the difference between avicel pH 102 and avicel pH 302?

Avicel PH 102 and Avicel PH 302 are both microcrystalline cellulose excipients used in pharmaceutical formulations, but they differ in their particle size and flow properties. Avicel PH 102 has a larger particle size and is typically used for direct compression, providing good binding and flow characteristics. In contrast, Avicel PH 302 has a finer particle size, enhancing its ability to improve the flow of powders and allowing for better compaction in tablet formulations. These differences influence their applications in various dosage forms.