The intercalation compounds graphite bisulfate and graphite perchlorate can be prepared by treating graphite with strong oxidizing agents in the presence of strong acids. In contrast to the potassium and calcium graphites, the carbon layers are oxidized in this process:
:48 C + 0.25 O + 3 HSO → [C][HSO]·2HSO + 0.5 HO
In graphite perchlorate, planar layers of carbon atoms are 794 picometers apart, separated by  ions. Cathodic reduction of graphite perchlorate is analogous to heating , which leads to a sequential elimination of .
Both graphite bisulfate and graphite perchlorate are better conductors as compared to graphite, as predicted by using a positive-hole mechanism.
Reaction of graphite with  affords the salt .