4-hydroxy-3,5-bis(1-methylethyl)-benzaldehyde is used as a starting material for the one-pot synthesis of 3,5-Dialkyl-4-hydroxybenzonitrile derivatives; Also, it is an intermediate used in the synthesis of MTS PHOTO-SWITCHABLE Compound (M125115), a derivative compound of Maleidopropionic Acid (M140750), a sulfhyryl reactive heterobifunctional crosslinking reagent.