Chemical class · 30 compounds tracked
PFAS
Per- and polyfluoroalkyl substances are a class of approximately 15,000 synthetic chemicals valued for stain, water, and grease resistance. Persistent in the environment and the human body, they are detected in food, water, and human blood worldwide.
Long Chain Pfas 15
Restricted
CAS 335-67-1
PFOA
Perfluorooctanoic acid
One of the most studied PFAS, used to manufacture Teflon and other non-stick coatings until US phase-out in 2015. Linked to kidney and testicular cancer; EPA finalized a 4 ppt drin…
Restricted
CAS 1763-23-1
PFOS
Perfluorooctanesulfonic acid
Originally used in Scotchgard and many waterproofing applications. Phased out by 3M in 2002. One of the most bioaccumulative PFAS; EPA finalized a 4 ppt drinking water limit in 202…
Restricted
CAS 355-46-4
PFHxS
Perfluorohexanesulfonic acid
PFAS historically used in firefighting foam and stain-resistant treatments. Bioaccumulative; EPA finalized a 10 ppt drinking water limit in 2024.
CAS 375-95-1
PFNA
Perfluorononanoic acid
Long-chain PFAS used as a processing aid for fluoropolymers. EPA finalized a 10 ppt drinking water limit in 2024.
CAS 335-76-2
PFDA
Perfluorodecanoic acid
Long-chain PFAS detected in food and human serum. FDA added a toxicological reference value for PFDA in 2025.
CAS 307-55-1
PFDoA
Perfluorododecanoic acid
Long-chain perfluoroalkyl carboxylic acid. Limited consumer use; detected in environmental and biological samples.
CAS 72629-94-8
PFTrDA
Perfluorotridecanoic acid
Long-chain perfluoroalkyl carboxylic acid. Found in trace amounts in environmental samples.
CAS 2058-94-8
PFUdA
Perfluoroundecanoic acid
Long-chain perfluoroalkyl acid. Bioaccumulates in wildlife and humans.
CAS 79780-39-5
PFDoS
Perfluorododecanesulfonic acid
Long-chain perfluoroalkyl sulfonic acid. Limited testing data.
CAS 335-77-3
PFDS
Perfluorodecanesulfonic acid
Long-chain perfluoroalkyl sulfonic acid.
CAS 375-92-8
PFHpS
Perfluoroheptanesulfonic acid
Long-chain perfluoroalkyl sulfonic acid. Limited routine consumer-facing data.
CAS 68259-12-1
PFNS
Perfluorononanesulfonic acid
Long-chain perfluoroalkyl sulfonic acid.
CAS 376-06-7
PFTeDA
Perfluorotetradecanoic acid
Long-chain perfluoroalkyl carboxylic acid. Limited routine testing data.
PFAS
PFTrDS
Perfluorotridecanesulfonic acid
Long-chain perfluoroalkyl sulfonic acid. Limited testing data.
CAS 749786-16-1
PFUdS
Perfluoroundecanesulfonic acid
Long-chain perfluoroalkyl sulfonic acid.
Short Chain Pfas 4
CAS 375-73-5
PFBS
Perfluorobutanesulfonic acid
Short-chain PFAS used as a replacement for PFOS. Found in stain repellents and firefighting foam. Subject to EPA hazard index limit in 2024.
CAS 375-85-9
PFHpA
Perfluoroheptanoic acid
Short-chain perfluoroalkyl carboxylic acid. Detected in drinking water and environmental samples.
CAS 307-24-4
PFHxA
Perfluorohexanoic acid
Short-chain PFAS used as a replacement for longer-chain PFAS like PFOA. Found in firefighting foam, food packaging, and textile coatings.
CAS 2706-91-4
PFPeS
Perfluoropentanesulfonic acid
Short-chain perfluoroalkyl sulfonic acid. Detected in environmental water samples.
Replacement Pfas 4
CAS 13252-13-6
HFPO-DA (GenX)
Hexafluoropropylene oxide dimer acid
Marketed as a safer PFOA replacement starting around 2009, but subsequent research found similar health concerns. EPA finalized a 10 ppt drinking water limit in 2024. Manufactured …
CAS 763051-92-9
11Cl-PF3OUdS
11-Chloroeicosafluoro-3-oxaundecane-1-sulfonate
Chlorinated polyfluorinated ether sulfonate. PFOS replacement chemistry.
CAS 73606-19-6
9Cl-PF3ONS
9-Chlorohexadecafluoro-3-oxanonane-1-sulfonate
Chlorinated polyfluorinated ether sulfonate used as a PFOS replacement, primarily in Chinese electroplating. Part of the F-53B mixture.
CAS 958445-44-8
ADONA
Dodecafluoro-3H-4,8-dioxanonanoate
Short-chain PFAS replacement developed as an alternative to PFOA. Used in fluoropolymer manufacturing in Europe.
Fluorotelomer 4
CAS 120226-60-0
10:2 FTS
10:2 Fluorotelomer sulfonate
Long-chain fluorotelomer sulfonate. Limited routine testing.
CAS 757124-72-4
4:2 FTS
4:2 Fluorotelomer sulfonate
Fluorotelomer sulfonate used in firefighting foam. Degrades to shorter-chain PFAS in the environment.
CAS 27619-97-2
6:2 FTS
6:2 Fluorotelomer sulfonate
Most-used fluorotelomer sulfonate in modern firefighting foams. Marketed as a PFOS replacement but degrades to persistent shorter-chain PFAS.
CAS 39108-34-4
8:2 FTS
8:2 Fluorotelomer sulfonate
Fluorotelomer sulfonate. Can degrade to PFOA in the environment.