Resorcinol

Solvents (ethanol, acetone, benzene, methanol and HCl, etc.) and chemicals (DPPH (C₁₈H₁₂N₅O₆); potassium persulphate (K₂S₂O₈), Folin-Ciocalteu (C₁₀H₅NaO₅S) reagent (FCR); disodium hydrogen orthophosphate, trichloroacetic acid (C₂HCl₃O₂), ferric chloride (FeCl₃), potassium ferricyanide (C₆N₆FeK₃), sodium carbonate (Na₂CO₃), ammonium molybdate, 2,2′-azino-bis[3-ethylbenzothiazoline-6-sulfonate] (ABTS), etc.) were of either HPLC or analytic grade (Sigma Aldrich, HiMedia, India). Standards (HPLC grade) used during different antioxidant assays were procured from Sigma Aldrich. HPLC grade standards (Resorcinol, catechol, vanillin, ferulic acid, quercetin, benzoic acid, ascorbic acid, catechin, gallic acid and p-Coumaric acid) were procured from HiMedia and Sigma-Aldrich, respectively.

Guaiacol, 2, 2′-azino bis[3-ethylbenzthiazoline-6-sulfonate] (ABTS), syringaldazine (SGZ), sephadex G-150 and DEAE-cellulose were purchased from Sigma (USA). Other substrates viz. pyrogallol, α-naphthol, p-phenylenediamine (PPD), resorcinol, 2, 6-dimethoxyphenol (DMP), catechol, 3,4-dihydroxy-phenylalanine (L-DOPA) and tyrosine were purchased from Hi-media. Other chemicals used were of analytical grade.