1H-Indene, 1-ethyl-2,3-dihydro-1,3,3-trimethyl- (CAS 60899-29-8) — Woody Middle to base Note Fragrance Ingredient
1H-Indene, 1-ethyl-2,3-dihydro-1,3,3-trimethyl-
CAS 60899-29-8
What Is 1H-Indene, 1-ethyl-2,3-dihydro-1,3,3-trimethyl-?
1H-Indene, 1-ethyl-2,3-dihydro-1,3,3-trimethyl- is a synthetic fragrance ingredient primarily used in industrial and niche perfumery. It’s not commonly encountered in everyday consumer products but may appear in avant-garde or experimental fragrances. This compound contributes unique woody and amber nuances, valued for its ability to add complexity and depth to fragrance compositions where traditional ingredients fall short.
Safety Profile
USE WITH AWARENESSWhat Does 1H-Indene, 1-ethyl-2,3-dihydro-1,3,3-trimethyl- Smell Like?
This synthetic molecule offers a bold, unconventional olfactory profile. Initially presents with sharp, almost metallic woody tones that quickly evolve into a warm, resinous heart reminiscent of aged amber and fossilized resins. The dry-down reveals subtle leathery undertones with a faintly animalic edge, behaving like a chameleon that shifts between modern synthetic crispness and ancient amber warmth. Lasting power is moderate with a tendency to cling to fabric fibers.
Chemistry, Properties & Perfumer Guide
The Chemistry
1H-Indene, 1-ethyl-2,3-dihydro-1,3,3-trimethyl- belongs to the indane chemical class, characterized by a fused benzene and cyclopentane ring system. The ethyl and methyl substitutions create steric hindrance that influences its volatility and odor characteristics. Synthesized through Friedel-Crafts alkylation reactions, this compound exemplifies how subtle modifications to indane structures can dramatically alter olfactory properties. The absence of chirality simplifies production but limits olfactory nuance compared to asymmetric analogs.
Physical & Chemical Properties
Perfumer Guide
| Application | Typical % | Range | Notes |
|---|---|---|---|
| Fine Fragrance | 0.5-2% | Up to 5% | Used as an amber modifier |
| Functional Fragrance | 0.1-0.5% | Up to 1% | For industrial applications |
Classic Accords
Tip: Use sparingly as an amber enhancer in woody-oriental bases where traditional materials need modern augmentation.
Alternatives & Comparisons
Offers similar woody-indole character with added floralcy from the acetate group, useful when more diffusion is needed.
Safety, Regulatory & Sustainability
⚠ Regulatory Disclaimer
General reference only. Consult current IFRA Standards Library before formulating.
IFRA Status
Not currently restricted by IFRA standards.
RIFM Assessment
No RIFM assessment available; treat as precautionary material.
Sustainability
As a fully synthetic material, this compound avoids natural resource depletion but requires petrochemical feedstocks. Production energy costs are moderate compared to complex natural isolates. Being a single molecule simplifies biodegradability prediction compared to complex natural mixtures.
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