Methyl perchlorate is an organic chemical compound with the chemical formula CH3ClO4. Its molecular structure is a methyl group covalently bonded by a single bond to a perchlorate group, CH3−O−Cl(=O)3, in which chlorine has an oxidation state of +7. Like many other perchlorates, it is a high energy material. It is also a toxic alkylating agent and exposure to the vapor can cause death. It can be prepared by treating iodomethane with a solution of silver perchlorate in benzene.