Butyl oxalate (dibutyl oxalate) is a faint, mildly sweet ester with a waxy, oily character and slight balsamic nuance. It is very low-odor and is more commonly encountered as a solvent or intermediate than as a featured perfumery note.AI · claude-opus-4-7
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Perfume and Flavor Chemicals, page 211.
Colorless liquid.
Insoluble in water, soluble in alcohol and oils.
Faint, nondescript odor between fruity and winey, rather pleasant but weak.
Has been suggested for use in perfumes as a solvent/blender, but does not seem to offer advantages over odorless or low-odor solvents conventionally used.
Produced from n-Butanol and Oxalic acid by direct esterification.