Class 9 Cleanroom is the ninth classification type of the ISO 14644-1 classification standard, the ISO Class 9 Cleanroom does not corresponds to any cleanroom in the FED-STD-209E Cleanroom classification.
The maximum allowable particles for particles for a ISO Class 9 Cleanroom are below:
0.5 µm : 35200000 per cubic metre
1 µm : 8320000 per cubic metre
5 µm : 293000 per cubic metre
