Tetrahydroxy-1,4-benzoquinone bisoxalate is a chemical compound, an oxide of carbon with formula C10O10.

Its molecule consists of a 1,4-benzoquinone core with the four hydrogen atoms replaced by two oxalate groups.

The compound was first described by H. S. Verter, H. Porter, and R. Dominic in 1968.

It was obtained by reacting tetrahydroxy-1,4-benzoquinone with oxalyl chloride in tetrahydrofuran.

It is a yellow solid that can be crystallized as a tetrahydrofuran solvate, but could not be prepared in pure form.