Heptanal dimethyl acetal (CAS 10032-05-0) — Green Top Note Fragrance Ingredient

ByThe Good Scents
Green · Citrus

Heptanal dimethyl acetal

CAS 10032-05-0

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

What Is Heptanal dimethyl acetal?

Heptanal dimethyl acetal is a synthetic fragrance ingredient used to add crisp, green, and aldehydic notes to perfumes. It’s often found in modern citrus and aquatic fragrances. This versatile ingredient helps create fresh, clean impressions that are popular in laundry detergents, air fresheners, and personal care products.

Safety Profile

GENERALLY SAFE
Generally safeUse with awarenessProfessional use
✓ Safe in regulated products
⚠ Avoid direct skin contact in high concentrations
CAS
10032-05-0
Formula
Mixture
MW
Variable
Odor Family
Green · Citrus
Layer 1 · Enthusiast

What Does Heptanal dimethyl acetal Smell Like?

Heptanal dimethyl acetal delivers a sharp, green-aldehydic burst reminiscent of freshly cut grass with a citrusy edge. The initial impression is intensely fresh, evolving into a soapy-clean heart with waxy undertones. Dry-down reveals subtle marine nuances, making it ideal for modern aquatic compositions.

Scent Profile

In Famous Fragrances

Fragrance associations may not reflect actual formulations.

Cool Water(Davidoff, 1988)

Used to amplify the marine freshness, contributing to its iconic ozonic-citrus opening.

L'Eau d'Issey(Issey Miyake, 1992)

Provides crisp aldehydic lift to the watery floral accord.

Layer 2

Chemistry, Properties & Perfumer Guide

The Chemistry

Heptanal dimethyl acetal is an acetal derivative of heptanal. It’s synthesized through acid-catalyzed reaction of heptanal with methanol. The acetal group provides stability against oxidation while preserving the aldehydic character. This makes it valuable for long-lasting fresh effects in functional fragrances.

Physical & Chemical Properties

Boiling PointN/A
DensityN/A

Perfumer Guide

Note Position
Top
Volatility
Medium (1-2 hours)
Blending
Good
ApplicationTypical %RangeNotes
Fine Fragrance0.5-2%Up to 5%Fresh top notes
Functional Products0.1-0.5%Up to 1%Clean effect booster

Classic Accords

Tip: Use with citrus notes to prevent soapy dominance.

Alternatives & Comparisons

1
Octanal dimethyl acetal CAS 10032-06-1

Similar profile with more citrus intensity, used when brighter top notes are needed.

Layer 3

Safety, Regulatory & Sustainability

⚠ Regulatory Disclaimer

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

IFRA Status

No restrictions under IFRA standards.

EU Allergen Declaration

Not listed in EU allergen regulation.

RIFM Assessment

RIFM safety assessment concluded safe at current usage levels.

Sustainability

Synthetic production allows consistent quality without natural resource depletion. Manufacturing process follows green chemistry principles with high atom economy.

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References

  1. PubChem Compound Summary for Heptanal dimethyl acetal PubChem

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

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