3-Tert-butyl-2,5-dihydroxybenzaldehyde (5-Hydroxy-3-tert-butyl-salicylaldehyde) is an epoxide that contains a hydroxyl group. It is used in the synthesis of chiral epoxides and sulfoxides. This compound reacts with thionyl chloride to produce sulfoxide compounds. The reaction between 3-tent-butyl-2,5-dihydroxybenzaldehyde and hydrogen peroxide produces a chiral epoxide, which can be oxidized to form an aldehyde or reduced to a ketone. This chemical has been shown to react with chloride ions in the presence of an oxidant such as potassium permanganate or peroxy trifluoroacetic acid, forming chlorinated derivatives.