Dihydro-beta-ionol (CAS 3293-47-8) — Woody Middle Note Fragrance Ingredient

ByThe Good Scents
Woody · Floral

Dihydro-beta-ionol

CAS 3293-47-8

Origin
synthetic
Note
Middle
IFRA
Generally safe
Data as of: Apr 2026

What Is Dihydro-beta-ionol?

Dihydro-beta-ionol is a synthetic fragrance ingredient used to add woody, floral nuances to perfumes. It’s found in fine fragrances, soaps, and detergents. This versatile molecule helps create natural-smelling floral bouquets while providing excellent stability in formulations.

Safety Profile

GENERALLY SAFE
Generally safeUse with awarenessProfessional use
✓ IFRA compliant
⚠ Check local regulations
CAS
3293-47-8
Formula
Mixture
MW
Variable
Odor Family
Woody · Floral
Layer 1 · Enthusiast

What Does Dihydro-beta-ionol Smell Like?

Dihydro-beta-ionol opens with a crisp, woody freshness reminiscent of freshly cut cedar planks. As it evolves, a delicate floral character emerges – like violets blooming in a sun-dappled forest. The dry-down reveals a subtle powdery softness, blending seamlessly with other ingredients while maintaining excellent tenacity.

Scent Profile

In Famous Fragrances

Fragrance associations may not reflect actual formulations.

Bois d'Argent(Dior, 2004)

Used here to create the signature woody-violet accord that defines this modern classic, providing both diffusion and persistence.

Molecule 02(Escentric Molecules, 2008)

Showcases dihydro-beta-ionol’s standalone beauty as a woody-floral with remarkable skin affinity.

Layer 2

Chemistry, Properties & Perfumer Guide

The Chemistry

Dihydro-beta-ionol belongs to the ionone family of terpenoid compounds. While naturally occurring in small quantities, commercial versions are typically synthesized from alpha-pinene or citral. The hydrogenation of beta-ionone creates this more stable, saturated version with different olfactory properties.

Physical & Chemical Properties

Boiling Point250 °C
Density0.93 g/cm³
Refractive Index1.49

Perfumer Guide

Note Position
Middle
Volatility
Medium (2-4 hours)
Blending
Excellent
ApplicationTypical %RangeNotes
Fine Fragrance2-5%Up to 10%Woody-floral base
Functional Fragrance0.5-2%Up to 3%Soap/detergent stability

Classic Accords

Tip: Use with ionones to enhance floralcy or with sandalwood materials for depth.

Alternatives & Comparisons

1
Beta-ionone CAS 79-77-6

More intense floral character but less stable in alkaline formulations.

2
Dihydro-alpha-ionone CAS 25312-34-9

Similar profile with slightly fruitier nuances.

Layer 3

Safety, Regulatory & Sustainability

⚠ Regulatory Disclaimer

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

IFRA Status

No restrictions under current IFRA standards.

RIFM Assessment

RIFM assessment confirms safe use at current industry levels.

Sustainability

Synthetic production allows consistent quality without plant resource demands. Modern catalytic processes minimize waste and energy use compared to early synthesis methods.

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References

  1. Bickers et al. (2003). Safety assessment of cyclic terpenes. Food and Chemical Toxicology. PMID 12804649
  2. Sell C. (2006). The Chemistry of Fragrances. RSC Publishing. DOI 10.1039/9781847555402

Data: PubChem (NIH), PubMed, RIFM, IFRA. Last reviewed: Apr 2026.

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