2,5-Dihydroxybenzoic acid, 99% - is a derivative of benzoic acid and a minor (1%) product of the metabolic break down of aspirin, excreted by the kidneys.
D 5698 (OTTO) 2,5-Dihydroxybenzoic acid, 99% Cas 490-79-9 - used as a matrix in the MALDI time-of-flight mass spectrometry analysis of the poly(styrene-co-pentafluorostyrene) copolymers.