Principal synonym: Timbersilk · Boisiris · Iso Gamma Superne
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One of the most influential materials in modern perfumery. Iso E Super contributes a smooth, transparent woody-amber effect — often described as velvety cedar with a soft, slightly musky glow. Its most valuable trait is diffusion: it extends and lifts a composition without shouting, giving fragrances an airy, radiant volume.
On the strip it opens quiet and grows in presence over hours, drying down to a clean, refined woody warmth. It blends effortlessly with almost everything and is frequently used at high percentages as a backbone or "glue" that ties disparate materials together.
| Typical role | Woody backbone · diffuser · fixative |
| Complements | Cedarwood · Vetiver · Ambroxan · Hedione |
| Effects it creates | Radiance · volume · smooth dry-down |
| Suggested starting range | 1–20% of concentrate |
| Notes | Very safe to overdose; anosmia common at high levels |
| Chemical name | Octahydro-tetramethyl-acetonaphthone |
| CAS number | 54464-57-2 |
| FEMA number | 3312 |
| Appearance | Colourless to pale-yellow liquid |
| Solubility | Soluble in ethanol & DPG; insoluble in water |
| Recommended storage | Cool, dark, tightly closed |
| Flash point | > 100 °C |
| Shelf-life guidance | 36+ months, well stored |
| Available concentrations | Neat · 10% DPG · 50% DPG |
Dry ambergris warmth that pairs beautifully with Iso E.
Smoky-earthy root that grounds woody accords.
Velvety woody-musk with spicy-pine warmth.
Dry cedar-amber; a useful woody amplifier alongside Iso E.