(1R,2R)-1,2-dihydrobenzene-1,2-diol + NADP(+) = catechol + H(+) + NADPH D-xylose + NADP(+) = D-xylono-1,5-lactone + H(+) + NADPH Strongly inhibited by isoascorbic acid, 4-hydroxyacetophenone and 4-chloromercuriphenylsulphonate. Stimulated by various salts. Homodimer. Liver and kidney. Belongs to the Gfo/Idh/MocA family.