Article: Water Activity and Primary Packaging Selection for Oral Solid Dosage Products

The new general chapter USP<922> states that water activity determination can be used to assess the level of protection provided by primary packaging for an oral solid dosage product over its entire shelf life. Water activity measurements, described in this article, provide unique information and complement the data collected from USP<670> Auxiliary Packing Components and USP<671> Containers – Performance Testing.