Iso — 14644-9 Pdf

While most cleanroom professionals know Part 1 (airborne particles), Part 9 focuses on – specifically classifying surface cleanliness by particle concentration (non-viable & viable).

This standard defines classification systems for surface contamination by solid particles – both non-viable (dust, fibers) and viable (microbes). Use it to set limits for product-contact surfaces, walls, floors, or equipment in cleanrooms.

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Looking to classify surface contamination by chemical or molecular layers? That’s where ISO 14644-9 comes in.

| System | Contaminant | Typical Units | Common Method | |--------|-------------|---------------|----------------| | System A | Non-viable particles (≥0.05 µm) | Particles/m² | Surface particle counter, microscopic | | System B | Viable particles (CFU) | CFU/m² or CFU/contact plate | Contact plate, swab, air sampler (surface mode) | While most cleanroom professionals know Part 1 (airborne

Since ISO 14644-9 is often overlooked, here’s a breakdown for those looking for the PDF or key info:

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📄 The official ISO 14644-9 PDF is available from ISO.org or your national standards body (ANSI, BSI, DIN, etc.).