X0101 EFFECT 33 LIVE 2016-04-12 16:00:00

S-4

0001627223 Chemours Co 333-210291 0001668334 International Dioxcide, Inc. 333-210291-08 0001668337 Chemours Co FC, LLC 333-210291-07 0001668336 Chemours Co TT, LLC 333-210291-06 0001026601 CHEMFIRST INC 333-210291-05 0001668237 First Chemical Corp 333-210291-04 0001668240 First Chemical Holdings, LLC 333-210291-03 0001668241 First Chemical Texas, L.P. 333-210291-02 0001668338 FT Chemical, Inc. 333-210291-01