2,6-Dimethoxy-4-hydroxybenzaldehyde (4-hydroxy-2,6-dimethoxybenzaldehyde) is a p-hydroxybenzaldehyde derivative. Its synthesis by Vielsmeyer-Haack reaction and confirmation of the product formation by 1H NMR has been reported. Its structure has been investigated. The sodium salt of 4-hydroxy-2,6-dimethoxybenzaldehyde may be used to derivatize Merrifield resin to form resin-bound aldehyde.