11-Chloroeicosafluoro-3-oxaundecane-1-sulfonic Acid (11Cl-PF3OUdS)
11Cl-PF3OUdS is a longer-chain chlorinated perfluoro ether sulfonate included in UCMR5. Like its structural analog 9Cl-PF3ONS, it belongs to a newer class of PFAS compounds that have emerged as manufacturers sought alternatives to PFOA and PFOS. The longer chain length of 11Cl-PF3OUdS may increase its tendency for environmental persistence and bioaccumulation compared to its shorter-chain analog. Detection in drinking water is being tracked under UCMR5 to characterize its distribution across US water systems.
Where 11Cl-PF3OUdS comes from
Common uses
- Industrial fluorochemical applications
- Specialty surfactants
Industries
- Chemical manufacturing
Health effects of 11Cl-PF3OUdS exposure
Short-term effects
- Very limited toxicological data
Long-term effects
- Unknown; structural characteristics suggest persistence
Most vulnerable populations
- People near industrial sources
How to remove 11Cl-PF3OUdS from drinking water
- Reverse osmosis
- 94% removal
- Activated carbon
- 78% removal
- Ion exchange
- 94% removal
See filters certified to remove 11Cl-PF3OUdS and other PFAS.
Is 11Cl-PF3OUdS in your water? – Enter your ZIP at KnowYourExposure to see your local EPA test results.