Woody · Balsamic

Octahydro-4,4,7-trimethyl-3H-naphth[1,8a-b]oxiren-7-ol

CAS 68845-01-02

Origin

synthetic

Note

Middle to base

IFRA

Use with awareness

Data as of: Apr 2026

What Is Octahydro-4,4,7-trimethyl-3H-naphth[1,8a-b]oxiren-7-ol?

Octahydro-4,4,7-trimethyl-3H-naphth[1,8a-b]oxiren-7-ol is a synthetic fragrance ingredient used in modern perfumery. It appears in niche and avant-garde fragrances seeking unusual woody-ambery effects. This molecule matters because it represents perfumery’s push toward novel synthetic structures that expand creative possibilities beyond natural materials.

Safety Profile

USE WITH AWARENESS

Generally safeUse with awarenessProfessional use

✓ No major restrictions in current IFRA guidelines

⚠ Limited safety data – recommended for professional formulation

CAS

68845-01-02

Formula

Mixture

Variable

Odor Family

Woody · Balsamic

Layer 1 · Enthusiast

What Does Octahydro-4,4,7-trimethyl-3H-naphth[1,8a-b]oxiren-7-ol Smell Like?

This synthetic molecule delivers a complex interplay of dry woody facets with subtle ambery undertones. Initially presenting a crisp, almost camphoraceous top note, it evolves into a heart of weathered driftwood and faintly resinous character. The dry-down reveals surprising tenacity, leaving traces of smoked vanilla and mineralic musk. Imagine the scent of sun-baked stones near a cedar forest, with a whisper of antique parchment.

Scent Profile

Layer 2

Chemistry, Properties & Perfumer Guide

The Chemistry

Octahydro-4,4,7-trimethyl-3H-naphth[1,8a-b]oxiren-7-ol belongs to the class of oxygenated polycyclic compounds. Its structure features a naphthalene core with an epoxy bridge and hydroxyl group, creating unique stereochemical constraints. Synthesized through Diels-Alder reactions followed by selective oxidation, this molecule demonstrates how strategic oxygenation of polycyclic hydrocarbons can yield novel odor profiles. The epoxy group contributes to its distinctive mineralic character.

Physical & Chemical Properties

Perfumer Guide

Note Position

Middle to base

Volatility

Moderate (2-6 hours)

Blending

Good with woody materials

Application	Typical %	Range	Notes
Fine Fragrance	0.5-2%	Up to 5%	Used as woody-ambery modifier
Functional Fragrances	0.1-0.5%	Up to 1%	For dry woody effects

Classic Accords

+ Iso E Super = Enhanced woody diffusion + Cashmeran = Textured wood-amber accord

Tip: Use sparingly in woody bases to add mineralic complexity without overwhelming the blend.

Alternatives & Comparisons

Ambrox CAS 3738-00-9

For similar ambery-woody effects with better substantivity and safety profile.

Norlimbanol CAS 70788-30-6

When seeking more pronounced woody-dry effects with higher impact.

Layer 3

Safety, Regulatory & Sustainability

⚠ Regulatory Disclaimer

General reference only. Consult current IFRA Standards Library before formulating.

IFRA Status

No specific IFRA restrictions currently apply to this material.

RIFM Assessment

Not currently evaluated by RIFM – recommended for professional use only.

Sustainability

As a synthetic material, this compound avoids natural resource depletion but requires energy-intensive synthesis. Its environmental impact depends on manufacturing processes and waste management. Being relatively new, its biodegradation profile requires further study.

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