• Long-chain aldehyde with waxy citrus-soapy aroma
• Adds brightness, diffusion, and vintage polish to top and heart notes
• Essential in aldehydic florals, soapy perfumes, and green musky blends
• Works well in both classic and modern perfume structures
• Ideal for fine fragrance, attars, powdery perfumes, and body mists

Aldehyde C-11 (Undecanal) is a classic fatty aldehyde known for its fresh, waxy, citrus-like scent with creamy-soapy nuances. It provides a strong aldehydic top note that gives perfumes an elegant, sparkling lift, commonly used in aldehydic florals, green fragrances, and luxurious powdery compositions.

This aldehyde brings vintage sophistication and radiance, making it ideal for building classic or modern floral structures, especially in high-end, long-lasting perfumes.

INCI Name: Undecanal (Aldehyde C-11)

CAS Number: 112-44-7

Molecular Formula: C11H22O

Appearance: Clear, colorless liquid

Odor Description: Fresh, waxy, citrus-soapy, aldehydic

Purity: 98%+

Boiling Point: ~230°C

Flash Point: ~95°C

Density: ~0.83 g/cm³

Solubility: Soluble in alcohol, DPG, and carrier oils

Recommended Usage Level: 0.01%–1% in perfume concentrate

Category: Aldehydic Modifier – Top Note – Perfumery Use

Use 0.05–1% to bring soapy elegance and aldehydic lift to floral, green, or vintage perfume structures.

💡 To create a classic bright opening in your perfume 🌿🧼, use 0.05–1% Aldehyde C-11 in mists, attars, or sprays.

🌼 Blend with rose, muguet, or jasmine for luxurious aldehydic florals.

🍋 Use with petitgrain, neroli, or violet leaf for green citrus openings.

🧴 Perfect in vintage-style powdery perfumes and elegant unisex blends.

🔄 Let your formula rest 3–5 days—aldehydes mellow beautifully over time.

⚠️ Very diffusive—start with low percentages and build gently for balance.

Q1: What does Aldehyde C-11 smell like?

It smells waxy, citrusy, and soapy, with aldehydic freshness and a clean creamy tone—bright and classic.

Q2: Is it natural or synthetic?

It is a synthetic fatty aldehyde, used in perfumery to replicate clean citrusy-soapy effects found in luxury fragrances.

Q3: Can it be used in oil-based perfumes or attars?

Yes! It dissolves well in DPG, alcohol, and carrier oils, making it suitable for roll-ons, body mists, and solids.

Q4: What types of perfumes benefit from Aldehyde C-11?

Perfect for aldehydic florals, green fragrances, powdery perfumes, and vintage-style compositions.

Q5: What does it blend well with?

Pairs beautifully with aldehydes C-10 to C-12, rose, violet, neroli, sandalwood, musk ketone, and orris.