Nitrogen: Used for blanketing and purging of equipment and containers to prevent oxidation and contamination. It is used for particle size reduction, freeze-drying, and as a propellant for aerosol drug delivery systems.
Oxygen: Used for fermentation, where it is used as a growth factor for microorganisms. It is also used for oxidative reactions in the synthesis of active pharmaceutical ingredients.
Carbon dioxide: Used for pH control, where it is used as a buffering agent. It is also used in the extraction of plant-derived active pharmaceutical ingredients.
Specialty gases like Hydrogen, Nitrogen Dioxide, and Ammonia: Used in the pharmaceutical industry for the synthesis of active pharmaceutical ingredients.