9-Chlorohexadecafluoro-3-oxanonane-1-sulfonic Acid (9Cl-PF3ONS)
9Cl-PF3ONS is a chlorinated perfluoro ether sulfonate included in UCMR5 monitoring. It represents a newer class of PFAS that combines fluorinated ether structures with sulfonate groups. These compounds have been developed as potential replacements for older PFAS while maintaining similar functional properties. 9Cl-PF3ONS has been detected in drinking water sources, particularly near industrial facilities. Its environmental fate and human health effects are still under investigation, but its persistence in water systems warrants monitoring.
Where 9Cl-PF3ONS comes from
Common uses
- Industrial fluorochemical processing
- Specialty chemical applications
Industries
- Chemical manufacturing
Health effects of 9Cl-PF3ONS exposure
Short-term effects
- Limited toxicological data available
Long-term effects
- Unknown long-term effects; monitoring ongoing
Most vulnerable populations
- People near industrial chemical facilities
How to remove 9Cl-PF3ONS from drinking water
- Reverse osmosis
- 92% removal
- Activated carbon
- 72% removal
- Ion exchange
- 93% removal
Is 9Cl-PF3ONS in your water? – Enter your ZIP at KnowYourExposure to see your local EPA test results.