USP Updates on Mechanical Qualification for Dissolution Apparatus 3 and 4

In Pharmacopeial Forum PF 52(2), the United States Pharmacopeia (USP) has released two Stimuli articles outlining approaches for mechanical performance qualification of Apparatus 3 (Reciprocating Cylinder) and Apparatus 4 (Flow-Through Cell). Although not legally binding, these publications represent USP’s current perspective and provide direction for GMP laboratories where no official Performance Verification Test (PVT) exists. USP recommends strengthening mechanical qualification practices in alignment with <711> Dissolution and <1058> Analytical Instrument Qualification.

For Apparatus 3, emphasis is placed on levelness, vertical alignment, stroke consistency, dip rate accuracy, and maintaining temperature at 37.0 ± 0.5 °C. Routine checks and preventive maintenance are essential to ensure reliable operation.

For Apparatus 4, focus areas include flow rate accuracy, system integrity, dimensional verification, and temperature control. USP is also inviting proposals for suitable drug products to support future PVT development for both apparatus types.

15-03-2026