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3,5-Dihydroxybenzoic acid (α-resorcylic acid) is a dihydroxybenzoic acid.
D 1865 (OTTO) 3,5-Dihydroxybenzoic acid, 98% Cas 99-10-5 - used in organic synthesis and as intermediate for the pharmaceutical. D 1865 (OTTO) 3,5-Dihydroxybenzoic acid, 98% Cas 99-10-5 - used as biomarker of whole grain wheat and rye.