Definition
The metallic accord describes an olfactive impression of metal, usually rendered as iron, copper, blood, ozone or ink. It does not name a single ingredient but a reconstructed sensation, built with aldehydes and synthetics. The family stays rare in mainstream perfumery and flourishes in conceptual perfumery, where it evokes the workshop, the blade or a humid atmosphere.
Key molecules
Helional by IFF contributes a watery-ozonic-metallic facet, often described as a sea breeze on cold metal (source: Perfumer & Flavorist). Calone (methylbenzodioxepinone, 1966) signs the marine-metallic note of the 1990s aquatics.
Irones carry the metallic facet of iris (source: ScienceDirect). cis-3-hexenol brings a metallic edge to greens. Hedione by Firmenich is sometimes described with a fresh-metallic nuance at overdose levels.
Use in perfumery
The metallic accord remains a difficult territory, bordering on strange in mainstream perfumery. It rose with the Y2K aesthetic and olfactive futurism in the late 1990s. Odeur 53 by Comme des Garçons (1998) remains the landmark: Christian Astuguevieille assembled twenty-three "non-perfumery" notes including aluminum and nail polish (source: Fragrantica).
Niche perfumery has pushed further. Tin Roof by DSH Perfumes evokes a tin sheet heated by a storm; Mookherjee by Slumberhouse plays on cold metal and sap. The family stays more visible in conceptual niche than in designer perfumery.