6-Ethyl-1,2,3,4-tetrahydro-1,1,4,4-tetramethylnaphthalene is an intermediate used in the synthesis of 1-(3-Ethyl-5,5,8,8-tetramethyl-5,6,7,8-tetrahydronaphthalen-2-yl)ethanone (T295405), which is used in the study of temperature dependence of retention index for perfumery compounds on glass capillary column. It is also used in biological studies.