Iso E Super
Iso E Super is the most discussed molecule in modern perfumery. Synthesized in 1973, it vanishes from your nose while leaving an addictive velvety trail on skin that others smell but you cannot.
Character
How it smells
The ghost molecule that makes perfume magnetic.
Iso E Super can smell like nothing at all on a test strip, yet makes the wearer smell irresistibly appealing to everyone nearby.
Origin
United States
In the early 1960s, fragrance chemists began studying ionone structures, searching for molecules that could bridge the gap between natural and synthetic perfumery. John B.
Hall and James M. Sanders of International Flavors & Fragrances made the breakthrough in 1973, synthesizing a compound that would reshape how perfumers approach base notes.
The molecule patented that year offered something unprecedented: a material that could extend and enhance other ingredients without contributing its own distinct aroma. Molecules like Iso E Super opened the door to the modern era of fragrance construction, where synthetic chemistry enables effects impossible to achieve with natural ingredients alone.
Wears it best
Fragrances featuring Iso E Super
Good to know
Questions, answered
The essentials on Iso E Super in perfumery: how it smells, where it comes from, and how it behaves on skin.
Why can I not smell Iso E Super on myself?
Iso E Super causes olfactory adaptation faster than almost any other fragrance material. Within seconds of application, your receptors stop signaling its presence while it remains clearly detectable to others around you.
What does Iso E Super smell like?
Pure Iso E Super presents as warm, smooth wood with subtle amber and velvet qualities. It reads as clean rather than sharp, lacking any harsh edges. Think polished cedar stripped of its resinous bite.
Which perfumes use Iso E Super?
Le Labo Santal 33 contains Iso E Super as a key structural element, along with Escentric Molecules 01 which features it as the primary ingredient at high concentration. Most modern woody and ambroxan-style fragrances rely on this molecule.
Is Iso E Super safe to use in skincare?
Iso E Super carries IFRA certification for safe use in all cosmetic categories including skin application at normal concentrations. It is not classified as a sensitizer and shows no phototoxicity concerns.
Why do perfumers call it a fragrance enhancer?
Iso E Super amplifies and prolongs surrounding fragrance materials by creating a semi-occlusive film on skin that slows evaporation. Studies show it activates specific olfactory receptors that heighten perception of adjacent molecules.
How much Iso E Super goes into a typical perfume?
Concentrations typically range from 2% in fine fragrances up to 40% in dedicated products like Escentric Molecules. The material performs well across this entire spectrum, making it extremely versatile.
What is the difference between Iso E Super and Iso E Super Plus?
Iso E Super Plus contains additional isomers that provide greater odor intensity and faster delivery. It was developed to address the slower evaporation rate some formulators found limiting in the original molecule.
Does Iso E Super occur naturally anywhere?
Trace amounts of similar compounds exist in cedarwood and patchouli oils, but commercial Iso E Super is entirely synthetic. This ensures batch-to-batch consistency impossible with natural extracts.
