No. It is generally not acceptable from a CGMP perspective for a manufacturer of sterile drug products produced by aseptic processing to rely solely on ISO [International Organization for Standardization] 14644-1 Part 1: Classification of Air Cleanliness (14644-1) and ISO 14644-2 Part 2: Specifications for Testing and Monitoring to Prove Compliance with ISO 14644-1 (14644-2) when qualifying its facility. Rather, a manufacturer of sterile drug products produced by aseptic processing should use these ISO standards in combination with applicable FDA regulations, guidance, and other relevant references to ensure a pharmaceutical facility is under an appropriate state of control. Consequently, appropriate measures augmenting ISO’s recommendations (e.g., with microbiological data) would likely be expected for a firm to meet or exceed CGMP in a pharmaceutical facility.
Please understand that 14644-1 and 14644-2 have superseded Federal Standard 209E, Airborne Particulate Cleanliness Classes in Cleanrooms and Clean Zones (Federal Standard 209E). In November 2001, the U.S. General Services Administration canceled Federal Standard 209E.
Although 14644-1 and 14644-2 are not FDA regulations or FDA guidance, the Agency believes that they are useful in facilitating the international harmonization of industrial air classification for nonviable particle cleanliness in multiple industries (e.g., computer, aerospace, pharmaceutical). As such, FDA adopted these particle cleanliness ratings in the 2004 guidance for industry Sterile Drug Products Produced by Aseptic Processing–Current Good Manufacturing Practice. However, due to the unique aspects of producing sterile drug products by aseptic processing (e.g., microbiological issues), an aseptic processing manufacturer should not rely solely on 14644-1 and 14644-2 when qualifying its facility.