Which ISO classification is associated with an ante-room?

The correct answer is ISO class 8. An ante-room, which is often used in sterile compounding facilities, serves as a transition area between the controlled environments of a cleanroom and the outside environment. ISO class 8 specifies the cleanliness level of air within that space, indicating the allowable number of particles of a certain size per cubic meter.

In a sterile compounding setting, the ante-room is crucial for procedures such as gowning and handwashing while maintaining a level of cleanliness that minimizes the risk of contamination. ISO class 8 allows for a higher particle count than cleaner environments like ISO class 5 or ISO class 7, which are typically reserved for the actual sterile compounding area where aseptic techniques must be strictly adhered to.

Thus, the ISO class classification of the ante-room reflects the balance needed between cleanliness and practicality within the compounding workflow. This is why ISO class 8 is associated specifically with ante-rooms in the context of sterile compounding.