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Container closure integrity (CCI) has been a fundamental core requirement of containment and delivery solutions in the West product portfolio. Container closure systems (CCSs) must maintain both the sterility and stability of pharmaceutical products; very importantly they must be free of microbial contamination. Microbial ingress into a CCS will jeopardize product sterility.

Synthetic rubber has replaced natural rubber in many fields over the past decades. Very notable are the synthetic halobutyl rubbers used as a base for pharmaceutical elastomer components. They are an excellent choice due to their attributes of low permeability to air and moisture, excellent aging resistance, and low level of extractables. Halobutyl rubbers are available in two types, chlorobutyl and bromobutyl; both can be manufactured by co-polymerization with halogenated monomer.

We are committed to the continuous improvement of our products and services. We work to ensure our products are safe and effective by certifying that they meet the required specification and do not put patients at risk. One of the most important areas of risk mitigation is endotoxin reduction.