Sandalwood perfuming ingredients that are 2-[perhydro-trialkyl-2-naphthalenylidene]-1-propanol or propanal derivatives of the formula wherein one dotted line represents a carbon-carbon single bond and the other a carbon-carbon single bond or double bond; X represents a CH2OH group or a CHO group; each R1 represents a hydrogen atom or a methyl group; and the R2, taken separately, represent each a hydrogen atom or the two R2 groups, taken together, represent a CH2 group or a carbon-carbon double bond; and said compound is in the form of any one of its stereoisomers or a mixture thereof, along with the use of such compound(s) in perfuming compositions or articles in the perfumery industry.