Heptylidene diacetate (CAS 56438-09-06) — Green Top Note Fragrance Ingredient

ByThe Good Scents
Green · Citrus

Heptylidene diacetate

CAS 56438-09-06

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

What Is Heptylidene diacetate?

Heptylidene diacetate is a synthetic fragrance ingredient used in perfumery to add fresh, green, and slightly fruity nuances. It’s found in some modern citrus and floral fragrances, particularly those aiming for a crisp, contemporary effect. This molecule matters because it helps perfumers create bright opening accords that transition smoothly into heart notes, offering versatility in both masculine and feminine compositions.

Safety Profile

GENERALLY SAFE
Generally safeUse with awarenessProfessional use
✓ No major safety concerns at typical usage levels
⚠ Limited safety data – follow IFRA guidelines
CAS
56438-09-06
Formula
Mixture
MW
Variable
Odor Family
Green · Citrus
Layer 1 · Enthusiast

What Does Heptylidene diacetate Smell Like?

Heptylidene diacetate presents a vibrant olfactory profile – imagine biting into a just-ripe green apple with a whisper of pear skin, underscored by the crispness of freshly cut grass. The top note bursts with aldehyde-like freshness that quickly settles into a green, slightly waxy floralcy reminiscent of magnolia leaves. As it dries down, it reveals a subtle musky undertone that adds depth without heaviness, making it particularly useful for modern citrus and floral fragrances where a clean, diffusive quality is desired.

Scent Profile
Layer 2

Chemistry, Properties & Perfumer Guide

The Chemistry

Heptylidene diacetate belongs to the ester class of compounds, specifically a diacetate derivative of heptanal. While not found in nature, its structure mimics certain green, fruity odorants found in plants. Industrially, it’s synthesized through acetylation of heptanal derivatives, often using acetic anhydride as the acetylating agent. The molecule’s relatively small size and ester functional groups contribute to its volatility and fresh olfactory character.

Physical & Chemical Properties

Perfumer Guide

Note Position
Top
Volatility
Medium (1-2 hours)
Blending
Good
ApplicationTypical %RangeNotes
Fine Fragrance0.5-2%Up to 5%Used as fresh top note modifier
Functional Fragrance0.1-0.5%Up to 1%Adds green freshness to detergents

Classic Accords

Tip: Use in trace amounts to lift citrus compositions without adding excessive sweetness.

Alternatives & Comparisons

1
Hexyl acetate CAS 142-92-7

For a more pronounced fruity effect with similar green freshness

2
Cis-3-hexenyl acetate CAS 3681-71-8

When a more intense green leaf character is desired

Layer 3

Safety, Regulatory & Sustainability

⚠ Regulatory Disclaimer

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

IFRA Status

No specific IFRA restrictions. General ester guidelines apply.

RIFM Assessment

Limited RIFM assessment data available. Considered safe at current usage levels based on analog data.

Sustainability

As a synthetic material, heptylidene diacetate production avoids natural resource depletion. Modern synthesis routes aim for atom economy and reduced solvent waste. Being produced in controlled industrial settings allows for better environmental monitoring compared to some natural ingredient production.

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References

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

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    Perfumer’s Notes

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