C7H6O4

The molecular formula C7H6O4 may refer to:


 * Dihydroxybenzoic acids, a type of phenolic acids
 * 2,3-Dihydroxybenzoic acid (2-pyrocatechuic acid or hypogallic acid)
 * 2,4-Dihydroxybenzoic acid (β-resorcylic acid)
 * 2,5-Dihydroxybenzoic acid (gentisic acid)
 * 2,6-Dihydroxybenzoic acid (γ-resorcylic acid)
 * 3,4-Dihydroxybenzoic acid (protocatechuic acid)
 * 3,5-Dihydroxybenzoic acid (α-resorcylic acid)
 * Patulin, a mycotoxin produced by a variety of molds