USP <1225> - Validation of Compendial Procedures

What it says

General Chapter <1225> describes the characteristics that must be evaluated to validate an analytical procedure intended for compendial use, including accuracy, precision, specificity, detection limit, quantitation limit, linearity and range, providing the USP framework closely paralleling ICH Q2(R2).

Paraphrased for plain-language clarity. Always verify against the current published regulation text.

What it means in practice

• This chapter governs validation of new or modified analytical procedures being proposed for compendial use, distinct from Chapter <1226>, which addresses verification of an already-established compendial method at a specific laboratory.
• The validation parameters described closely mirror the ICH Q2(R2) framework, reflecting the close alignment between USP and ICH expectations for analytical procedure validation generally.
• Understanding which chapter applies, <1225> for validating a new or modified method, or <1226> for verifying an existing compendial method, is itself an important scoping decision that shapes what evidence is actually required.

What inspectors look for

• Whether the correct chapter, <1225> or <1226>, was applied based on whether the method is genuinely new or modified versus an unmodified compendial method being used as published.
• Whether validation data actually covers all parameters relevant to the method's intended use, consistent with the same rigor ICH Q2(R2) expects.
• Whether validation documentation is complete enough to support the specific claims made about the method's performance.

Related regulations