• 10% dilution in DPG for controlled dosing in oil-based and solid perfumes
• Adds aldehydic brilliance, green freshness, and soft creaminess
• Excellent in aldehydic florals, fresh musks, green florals, and ozonic blends
• Great for soap-style perfumes and classic white floral compositions
• Helps smooth transitions between citrus and floral notes

Aldehyde C-11 (10% in DPG) — also known as Undecylenic Aldehyde — is a classic fatty aldehyde with a waxy-green, citrusy-metallic scent, often used to impart a sparkling, airy lift to top notes and a soapy-clean elegance to floral and musky perfumes. Its long-chain structure gives it a slightly green, ozonic feel with soft warmth and creaminess in the drydown.

This 10% dilution in DPG (Dipropylene Glycol) makes it easier to blend in attars, oil-based perfumes, roll-ons, incense blends, and solid perfumes where a refined aldehydic lift is desired.

INCI Name: Aldehyde C-11 (Undecylenic Aldehyde)

CAS Number: 112-44-7

Molecular Formula: C11H22O

Appearance: Clear, colorless to pale yellow liquid

Odor Description: Waxy, green, metallic, soapy, aldehydic citrus

Purity: 10% in DPG

Boiling Point: ~243°C

Flash Point: ~90°C

Density: ~0.83 g/cm³

Solubility: Soluble in alcohol and DPG

Recommended Usage Level: 0.2%–3% of this dilution

Category: Aldehydic Modifier – Top Note – Perfumery Use

10% Aldehyde C-11 in DPG adds metallic-green aldehydic brilliance to citrus, floral, and soapy perfume compositions.

💡 Want to give your top notes a clean, sparkling lift? 🌿💫 Use 0.3–2% Aldehyde C-11 (10% in DPG) in your floral, citrus, or soap-style perfumes.

🌼 Pair with lily, muguet, or iris to create a refined vintage floral base.

🍋 Add to neroli or petitgrain blends for a fresh, ozonic citrus accord.

🧴 Combine with white musks or aldehyde C-12 for luxury soap effects.

🔄 Let the blend age a few days to allow the aldehydes to round out.

⚠️ Highly diffusive—dose carefully to avoid harshness in delicate blends.

Q1: What does Aldehyde C-11 smell like?

It smells metallic-waxy and green, with subtle citrus-soapy brightness and a creamy aldehydic warmth.

Q2: What kind of perfumes is it best for?

Perfect in aldehydic florals, fresh colognes, vintage musky scents, and soapy or ozonic blends.

Q3: Can I use this in oil-based perfumes or attars?

Yes! The 10% DPG dilution is ideal for use in attars, roll-ons, solid perfumes, and mists.

Q4: Is it natural?

No. It’s a synthetic fatty aldehyde, commonly used in fine fragrance for top-note brilliance.

Q5: What does it blend well with?

It blends well with jasmine, neroli, iris, musk ketone, aldehyde C-12, and green herbal notes.