Dihydroxybenzoic acids (DHBA) are a type ofphenolic acids.

There are six main compounds, having all the same molecular formulaC₇H₆O₄. Those are:

• 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)

Orsellinic acid is also a dihydoxybenzoic acid having an extra methyl group.

Index of chemical compounds with the same name

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