EU GMP Annex 6 - Manufacture of Medicinal Gases

What it says

Manufacture of medicinal gases requires GMP principles adapted for the specific characteristics of gaseous products, including cylinder and cryogenic vessel handling, filling line cross-contamination prevention between different gas types, and specific identity and purity testing appropriate to gaseous rather than solid or liquid dosage forms.

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

What it means in practice

• Medicinal gas manufacturing presents genuinely distinct practical challenges from most other dosage forms, including cylinder handling, filling equipment shared across potentially different gas products, and the specific risk of gas identity mix-up given that different medicinal gases can appear physically identical.
• Cylinder and valve management, including cleaning between different product fills and preventing cross-connection between different gas supply systems, is a specific and significant control category with limited parallel in other dosage forms.
• Purity and identity testing for medicinal gases addresses different analytical considerations than solid or liquid dosage forms, requiring gas-appropriate testing methodology.

What inspectors look for

• Whether filling line and cylinder handling procedures adequately prevent cross-contamination or mix-up between different medicinal gas products.
• Whether cylinder and valve fittings are appropriately product-specific or otherwise controlled to prevent incorrect gas being introduced into a cylinder intended for a different product.
• Whether identity testing for filled cylinders is performed and appropriate for confirming the correct gas was actually filled.

Related regulations