Clean Room & Contamination Control
Comprehensive reference for spacecraft manufacturing clean room requirements, ISO classifications, outgassing data, and contamination control procedures
ISO 14644-1:2015
ASTM E595
MIL-STD-1246C
COSPAR Planetary Protection
NASA-STD-5009
ISO 14644-1 Clean Room Classification
Maximum allowable particle concentrations (particles per cubic meter) at specified particle sizes for each ISO class. Click any row to see space industry applications.
| ISO Class | Fed Std 209E | ≥0.1μm | ≥0.2μm | ≥0.3μm | ≥0.5μm | ≥1.0μm | ≥5.0μm |
|---|---|---|---|---|---|---|---|
ISO 1 | Class 1 | 10 | 2 | — | — | — | — |
ISO 2 | Class 10 | 100 | 24 | 10 | 4 | — | — |
ISO 3 | Class 100 | 1,000 | 237 | 102 | 35 | 8 | — |
ISO 4 | Class 1,000 | 10,000 | 2,370 | 1,020 | 352 | 83 | — |
ISO 5Common | Class 100 | 100,000 | 23,700 | 10,200 | 3,520 | 832 | 29 |
ISO 6 | Class 1,000 | 1,000,000 | 237,000 | 102,000 | 35,200 | 8,320 | 293 |
ISO 7Common | Class 10,000 | — | — | — | 352,000 | 83,200 | 2,930 |
ISO 8Common | Class 100,000 | — | — | — | 3,520,000 | 832,000 | 29,300 |
ISO 9 | Class 1,000,000 | — | — | — | 35,200,000 | 8,320,000 | 293,000 |
ISO 5 (Class 100)
Max 3,520 particles per m\u00B3 at 0.5\u03BCm
Optics, detectors, focal plane assembly, solar cell fabrication
ISO 7 (Class 10,000)
Max 352,000 particles per m\u00B3 at 0.5\u03BCm
General spacecraft assembly, bus integration, harness work
ISO 8 (Class 100,000)
Max 3,520,000 particles per m\u00B3 at 0.5\u03BCm
Large structure assembly, solar arrays, antenna reflectors, CubeSats
Reference Standards
ISO 14644-1:2015 - Clean room air cleanliness classification
ASTM E595 - Outgassing testing (TML & CVCM)
MIL-STD-1246C - Product cleanliness levels (particulate)
IEST-STD-CC1246E - Updated product cleanliness standard
NASA-STD-5009 - Nondestructive evaluation
GSFC-STD-7000A - Goddard contamination control
NASA-HDBK-6007 - Contamination control handbook
COSPAR Planetary Protection - Biological controls
NPR 8020.12D - NASA planetary protection provisions