Cleanroom Classification (ISO)

In the pharmaceutical industry, cleanrooms are classified based on ISO standards to ensure the controlled and clean environments necessary for the production of pharmaceutical products. ISO standards specify the maximum allowable levels of airborne particles of various sizes within a cleanroom. The ISO cleanroom classification system is based on the number of particles present in one cubic meter of air. Here are the ISO cleanroom classifications commonly used in the pharmaceutical industry:

1. ISO Class 5:

 Maximum Particles ≥0.5 µm: 3,520 particles per cubic meter

 Maximum Particles ≥5.0 µm: No specific limit

 This is the strictest classification and is typically used in critical areas where the highest level of cleanliness is required, such as aseptic filling areas for injectable pharmaceuticals.

2. ISO Class 6:

 Maximum Particles ≥0.5 µm: 35,200 particles per cubic meter

 Maximum Particles ≥5.0 µm: No specific limit

 ISO Class 6 cleanrooms are used for less critical operations within pharmaceutical manufacturing, such as compounding areas.

3. ISO Class 7:

 Maximum Particles ≥0.5 µm: 352,000 particles per cubic meter

 Maximum Particles ≥5.0 µm: 2,900 particles per cubic meter

 ISO Class 7 cleanrooms are suitable for tasks where a controlled environment is necessary but the requirements are not as stringent as in ISO Class 5 and 6 areas. Examples include secondary packaging and some compounding operations.

4. ISO Class 8:

 Maximum Particles ≥0.5 µm: 3,520,000 particles per cubic meter

 Maximum Particles ≥5.0 µm: 29,000 particles per cubic meter

 ISO Class 8 cleanrooms are used for activities where a controlled environment is needed but where the risk of contamination is lower than in higher-class cleanrooms. These areas might include corridors, warehouses, and some storage areas.

It's important to note that ISO cleanroom classifications are based on airborne particle counts, and they do not directly address microbial contamination. For pharmaceutical applications, additional measures and controls are often implemented to minimize the risk of microbial contamination, especially in areas where sterile products are manufactured.

Cleanroom classifications play a crucial role in ensuring that pharmaceutical products are produced under controlled and clean conditions, which is essential for maintaining product quality, safety, and compliance with regulatory standards such as Good Manufacturing Practices (GMP). Pharmaceutical manufacturers must design, maintain, and operate cleanrooms in accordance with the appropriate ISO cleanroom classification based on their specific production needs and regulatory requirements.