S500 S0₄^-is a strongly basic, macroreticular anion exchange resin. It is a true,macroporous network which differs completely from conventional gel type resins, and provides an outstanding osmotic and physical stability as well as excellent kinetics.The crosslinked polystyrenic matrix makes this resin particularly stable mechanically. S500 S0₄^- has been specially developed for the extraction of uranium from ore, both for insitu leaching and RIP processes.