3,5-Dihydroxybenzoic acid

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3,5-Dihydroxybenzoic acid, also known as α-Resorcylic acid, is a type of dihydroxybenzoic acid with the chemical formula C_7H_6O_4. It is one of the several isomers of dihydroxybenzoic acid, which are distinguished by the positions of the hydroxyl groups on the benzene ring.

Chemical Properties

3,5-Dihydroxybenzoic acid is a white to off-white crystalline powder. It has a melting point of approximately 230°C and decomposes upon boiling. The compound is slightly soluble in water but more soluble in ethanol and ether.

Synthesis

The synthesis of 3,5-Dihydroxybenzoic acid can be achieved through various chemical reactions, including the Kolbe-Schmitt reaction and the hydrolysis of suitable precursors.

Applications

3,5-Dihydroxybenzoic acid is used in the synthesis of various pharmaceuticals, dyes, and polymers. It also serves as an intermediate in organic synthesis and can be used in the study of enzyme activities.

Related Compounds

• Salicylic acid
• Gentisic acid
• Protocatechuic acid
• Gallic acid

See Also

• Benzoic acid
• Hydroxybenzoic acid
• Phenolic compounds