. Author manuscript; available in PMC: 2021 Jan 5.

Published in final edited form as: Environ Sci Process Impacts. 2020 Oct 30;22(12):2345–2373. doi: 10.1039/d0em00291g

Table 2:

PFAS with more than 10 assigned uses. Numbers based on counts of uses and patents, not on detections in products. The structures of these substances are shown in Figure 2.

Substance	CAS number	Assigned uses

Ammonium perfluorooctanoate	3825-26-1	14
Potassium perfluorooctane sulfonate	2795-39-3	16
Potassium N-ethyl perfluorooctane sulfonamidoacetate	2991-51-7	21
1-Propanaminium, 3-[[(1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,8-heptadecafluorooctyl)sulfonyl]amino]-N,N,N-trimethyl-, iodide (1:1)	1652-63-7	17
1-Propanaminium, 3-[[(1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,9,9,9-heptadecafluoro octyl)sulfonyl]amino]-N,N,N-trimethyl-, chloride	38006-74-5	21
Oxirane, 2-[[(3,3,4,4,5,5,6,6,7,7,8,8,8-tridecafluorooctyl)oxy]methyl]-	122193-68-4	11
1H-Pentafluoroethane	354-33-6	10
Pentane, 1,1,1,2,2,3,4,5,5,5-decafluoro-	138495-42-8	12
Methyl perfluoropropyl ether	375-03-1	13
Methyl perfluorobutyl ether	163702-07-6	16
Methyl perfluoroisobutyl ether	163702-08-7	16
Ethyl perfluorobutyl ether	163702-05-4	12
Polytetrafluoroethylene (PTFE)	9002-84-0	37
Poly(vinylidene fluoride) (PVDF)	24937-79-9	17
Ethylene tetrafluoroethylene copolymer (ETFE)	25038-71-5	10