Table 2.

Some common PFAS substances and the estimated serum half-lives in three species (Olsen et al. 2007; Fenton et al. 2021)

Chemical name	Abbreviation	Formula	Human	Monkey	Rat
Perflurobutanoic acid	PFBA	C4HF7O2	3 d	1.7 d	1–9 h
Perfluorohexanoic acid	PFHxA	C6HF11O2	32 d	2.4–5.3 h	0.4–0.6 h
Ammonium salt of hexafluoropylene oxide dimer acid	GenX HFPO DA	C6HF11O3	4–6 d	NA	3–8 h
Perfluoroheptanoic acid	PFHpA	C7HF13O2	1.2–2.5	NA	1.2 -2.4 h
Perfluorooctanoic acid	PFOA	C8HF15O2	2.1–3.8 y	21–30 d	2–6 d
Perfluorononanoic acid	PFNA	C9HF17O2	2.5–4.3 y	NA	1.4–55 d
Perfluorodecanoic acid	PFDA	C10HF19O2	3.1–4.4 y	NA	NA
Perfluorobutane sulfonic acid	PFBS	C4HF9O3S	28 d	3.5–4.0 d	2.1–4.5 h
Perfluorohexane sulfonic acid	PFHxS	C6HF13O3S	5.3–8.5 y	87–141 d	1.8–6.8 d
Perfluorooctane sulfonic acid	PFOS	C8H2F17NO2H	3.4–5.0 y	110–132 d	62–41 d

d days, h hour, y year, NA not available