From: Toxicology of perfluorinated compounds
Parameter
PFOS
PFOA
Excretion half-life
125 days
4.6 days
Residual blood concentration at the end of the 4-week excretion phase
48% to 52%
2% to 3%
Excretion rate constant
0.023% ± 0.004% per day
0.150% ± 0.010% per day