4-Penten-1-one, 1-spiro[4.5]dec-7-en-7-yl- (CAS 224031-70-3) — Woody Middle Note Fragrance Ingredient

ByThe Good Scents
Woody · Green

4-Penten-1-one, 1-spiro[4.5]dec-7-en-7-yl-

CAS 224031-70-3

Origin
synthetic
Note
Middle
IFRA
Professional use
Data as of: Apr 2026

What Is 4-Penten-1-one, 1-spiro[4.5]dec-7-en-7-yl-?

4-Penten-1-one, 1-spiro[4.5]dec-7-en-7-yl- is a synthetic fragrance ingredient primarily used in professional perfumery. It is not commonly encountered in consumer products outside of fine fragrances. This molecule contributes unique olfactory characteristics that are valued for creating distinctive scent profiles.

Safety Profile

PROFESSIONAL USE
Generally safeUse with awarenessProfessional use
⚠ Limited safety data available
⚠ Professional handling recommended
CAS
224031-70-3
Formula
Mixture
MW
Variable
Odor Family
Woody · Green
Layer 1 · Enthusiast

What Does 4-Penten-1-one, 1-spiro[4.5]dec-7-en-7-yl- Smell Like?

This synthetic molecule offers a complex olfactory profile with woody, slightly green undertones. It evolves from a sharp initial burst to a more rounded, earthy character over time. The dry-down reveals subtle balsamic nuances, making it useful for adding depth to modern fragrance compositions.

Scent Profile
Layer 2

Chemistry, Properties & Perfumer Guide

The Chemistry

4-Penten-1-one, 1-spiro[4.5]dec-7-en-7-yl- belongs to the ketone class of organic compounds. Its spirocyclic structure contributes to its unique olfactory properties. Synthesized through specialized organic reactions, this molecule demonstrates how modern fragrance chemistry can create novel scent molecules not found in nature.

Physical & Chemical Properties

Perfumer Guide

Note Position
Middle
Volatility
Medium (2-6 hours)
Blending
Good
ApplicationTypical %RangeNotes
Fine Fragrance0.5-2%Up to 5%Used as a modifier in woody accords

Classic Accords

Tip: Use sparingly to add woody complexity without overwhelming the composition.

Alternatives & Comparisons

1
Spirodecenal CAS 18871-14-2

Similar woody-spicy character with better safety profile and more extensive usage data.

Layer 3

Safety, Regulatory & Sustainability

⚠ Regulatory Disclaimer

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

IFRA Status

Not currently restricted by IFRA.

RIFM Assessment

Limited safety assessment data available from RIFM.

Sustainability

As a synthetic molecule, this ingredient avoids natural resource depletion concerns. However, its specialized synthesis may involve complex chemical processes with associated energy requirements.

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References

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

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