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