Principles of Aerosol Technology
Start with the big picture
An aerosol is a sealed, pressurized dosage form that releases solid or liquid particles suspended in gas when its valve is actuated. In a typical system, pressure moves the formulation through a dip tube; as it exits the nozzle, the propellant evaporates and the drug disperses. Aerosols are used for inhalation and for topical, nasal, or rectal delivery. For inhaled products, particle size is important: the source identifies approximately 1–5 µm as a range associated with deep lung deposition. Reliable use also depends on reproducible actuation, container-closure integrity, and valve performance. The broader lesson considers propellants, benefits and limitations, and the formulation, manufacturing, and aerosol-performance testing standards relevant to these systems.
What you'll learn
- Define an aerosol dosage form and describe how actuation releases its contents.
- Identify key components of an aerosol system and explain their roles in dispensing.
- Outline how pressure and propellant evaporation disperse a formulation through a nozzle.
- Explain why particle size matters for deep lung deposition.
- Recognize performance and safety considerations, including reproducible dosing and valve integrity.
Continue your study
Work through the complete notes and reinforce the topic with the study tools available in the full lesson.
