Well, they are “bound” as much as pure acid and pure hydroxide are (ergo they bind… and simultaneously destroy to make something else).
They are two different sides from one same coin -like acids and hydroxides-. Related to the same and having almost the same effects on organic tissue, but for the love of God don´t try to mix them unless you want to witness something “fun” going on.
Still ironic as per canon lore… you know, the stuff we discuss in this place.