USP <1207> - Package Integrity Evaluation - Sterile Products

What it says

General Chapter <1207> provides guidance on container closure integrity testing for sterile products, describing both deterministic methods, which directly measure a physical or chemical property related to seal quality, and probabilistic methods, which rely on microbial or dye ingress, with deterministic methods generally preferred for their objectivity and sensitivity.

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

What it means in practice

• This chapter reflects a meaningful shift in container closure integrity testing philosophy, favouring deterministic methods that directly and objectively measure a physical integrity parameter over older probabilistic methods relying on whether a challenge organism or dye happens to penetrate a compromised seal.
• Deterministic methods generally offer better sensitivity and reproducibility since they measure an actual physical property rather than depending on the probabilistic likelihood of detecting ingress through a specific-sized defect.
• Container closure integrity testing connects directly to the broader sterility assurance strategy, working alongside sterilisation validation and environmental monitoring as one of several lines of evidence supporting a sterile product's continued sterility throughout its shelf life.

What inspectors look for

• Whether the container closure integrity test method selected is appropriately sensitive and validated for the specific container-closure system and product.
• Whether a probabilistic method, if still in use, has a documented rationale given the general preference for deterministic methods described in this chapter.
• Whether container closure integrity testing is genuinely integrated into the broader sterility assurance strategy, not treated as an isolated, standalone test disconnected from other sterility evidence.

Related regulations