Avoid Using Pressurized Air for Powder Removal in GMP Equipment

Never Use Pressurized Air to Remove Powder from GMP Equipment

Remember: Do not use compressed air to clean powder residues — it risks aerosolizing particles, causing contamination and regulatory non-compliance.

Why This Matters in GMP

Compressed air is sometimes mistakenly used to dislodge powder residues from manufacturing equipment. While this may seem efficient, it actually increases the risk of airborne contamination, cross-contamination between products, and the spread of allergens or actives in shared production spaces. This can compromise product integrity and environmental cleanliness, particularly in solid oral dosage facilities.

For example, using compressed air to clean residual API from a blender can disperse fine particles into the surrounding area, settling on other surfaces or contaminating adjacent batches. These particles may be difficult to detect and remove, affecting future cleaning validation and increasing the risk of cross-contact with incompatible materials. Regulatory agencies strongly discourage such practices unless specifically validated and controlled with HEPA filtration.

Also Read: Never Permit Chemical Reuse in GMP Without Full Requalification

Regulatory and Compliance Implications

21 CFR Part 211.67 requires cleaning procedures that prevent contamination and cross-contact. EU GMP Chapter 5 and Annex 15 emphasize that cleaning methods should not disperse contaminants. WHO GMP similarly mandates cleaning methods that effectively remove residues without

generating airborne risks. The use of compressed air without proper justification or controls is generally viewed as a poor practice in GMP facilities.

During inspections, regulators examine cleaning SOPs, records, and observational practices. Use of unfiltered or undocumented compressed air cleaning may be cited as a critical observation related to poor cleaning control, potential for airborne particulate contamination, and failure in process segregation.

Also Read: Never Move In-Process Containers Without Lids or Covers in GMP Zones

Implementation Best Practices

Establish SOPs that prohibit the use of compressed air for powder removal unless validated and equipped with sterile HEPA-filtered systems. Prefer manual wiping with approved cleaning agents or validated vacuum systems that contain dust. Include visual inspection steps in cleaning protocols to ensure no residue remains.

Train cleaning and maintenance teams on the risks of compressed air usage in GMP environments. Document all cleaning actions, and if air is used in exceptional cases (e.g., HEPA-filtered blow-off in closed systems), include justification and validation data. Incorporate equipment cleaning verification into routine audits and cleaning validation protocols.

Regulatory References

– 21 CFR Part 211.67 – Cleaning and maintenance of equipment
– EU GMP Chapter 5 – Production controls
– EU GMP Annex 15 – Cleaning validation
– WHO TRS 1019, Annex 3 – Cleaning practices and airborne control

Also Read: Double-Check Materials Before Cleanroom Entry to Prevent GMP Contamination