• 10% dilution in DPG for controlled, low-dosage blending
• Adds bright citrus-green aldehydic lift to perfume top notes
• Excellent for soapy colognes, aldehydic florals, and masculine Fougères
• Widely used in vintage and classic compositions
• Suitable for attars, oil mists, roll-ons, and solid perfumes

Aldehyde C-9 (10% in DPG) is a short-chain fatty aldehyde with a sharp, citrusy, slightly waxy and green scent, often used to create a bright, sparkling top note in floral, citrus, and fougère compositions. It imparts freshness, energy, and radiance in small amounts, especially in classic aldehydic perfumes or soap-style blends.

This 10% dilution in DPG (Dipropylene Glycol) makes it suitable for use in attars, oil-based perfumes, roll-ons, solid perfumes, and incense oils where a clean aldehydic top is desired.

INCI Name: Aldehyde C-9 (Nonanal)

CAS Number: 124-19-6

Molecular Formula: C9H18O

Appearance: Clear, colorless liquid

Odor Description: Citrus, green, aldehydic, metallic, waxy

Purity: 10% in DPG

Boiling Point: ~191°C

Flash Point: ~75°C

Density: ~0.83 g/cm³

Solubility: Soluble in alcohol and DPG

Recommended Usage Level: 0.1%–2% of this dilution

Category: Aldehydic Top Note Modifier – Perfumery Use

Use 0.2–1.5% to boost freshness and top-note brilliance in classic or clean compositions. Especially helpful for brightening citrus or leafy-green accords.

💡 To create a sparkling aldehydic top note 🍋💫, use 0.2–1.5% Aldehyde C-9 (10% in DPG) in oil-based perfumes or attars.

🌼 Blend with jasmine or rose to recreate vintage aldehydic floral effects.

🍃 Add to fougères or citrus mists for a green aromatic twist.

🧼 Layer with soft musks or iris for a polished soap-like profile.

🔄 Let your blend rest for 2–5 days to allow aldehydes to harmonize.

⚠️ Strong and diffusive—use with care to avoid overpowering your top notes.

Q1: What does Aldehyde C-9 smell like?

It smells sharp, citrusy, green, and waxy, with a clean aldehydic brightness that’s instantly recognizable in classic perfumes.

Q2: Is it used in vintage-style or modern perfumes?

Both. It’s ideal for classic aldehydic florals as well as modern fresh fougères and soapy blends.

Q3: Can it be used in oil-based formats?

Yes. This 10% DPG dilution is ready to use in oil perfumes, solid fragrances, roll-ons, and incense compositions.

Q4: Is Aldehyde C-9 synthetic?

Yes, it’s a synthetic fatty aldehyde, although it can be found naturally in small amounts in citrus peels.

Q5: What does it blend well with?

Blends beautifully with jasmine, rose, neroli, musk, iris, and other aldehydes like C-10, C-11, and C-12 Lauric.