Gamma Nonalactone (Aldehyde C-18): What Is It?
The name includes "aldehyde," but it is not an aldehyde. Gamma Nonalactone is a lactone — that is, a cyclic ester. In old perfumery jargon it goes by "Aldehyde C-18," a technically incorrect name that has nonetheless become firmly established in the trade. Its scent makes you forget the misnomer: warm coconut, a creamy sweetness, a subtle peach-hazelnut touch. The rest is your signature.
It is a low-grade viscous liquid. Smelled neat, it has an oily coconut character; within a formula it weaves a sweet, creamy texture. It is frequently used alongside fruity notes such as Damascone Delta or musks such as Tonalide.
What It Does & Scent Profile
Gamma Nonalactone acts as a bridge material that adds "softness" to a composition. It rounds off harsh transitions and gives the fragrance a sweet, milky body. When the top notes lift off, this layer takes the stage.
| Property | Description |
|---|---|
| Fragrance family | Lactonic — creamy, milky |
| Main character | Coconut, peach, sweet hazelnut |
| Position in the pyramid | Heart–base bridge |
| Diffusion (sillage) | Medium — rounding, not projecting |
| Volatility | Medium-low; contributes to longevity |
It is indispensable in gourmand (sweet, edible-evocative) and tropical accords. It shines in coconut-monoi themes, peach hearts, and creamy floral compositions. Combined with warm balsamic notes such as Labdanum Absolute Super Premium, it creates an amber-gourmand balance.
How & At What Rate to Use It
This is a potent material. A small amount goes a long way. Too much will drag the composition into an oily, suffocating coconut oil. Start low and increase gradually, smelling as you go.
| Purpose | Approximate rate (in concentrate) |
|---|---|
| Trace/rounding (background texture) | 0.1–0.5% |
| Distinct creamy heart | 0.5–1.5% |
| Tropical/coconut theme (featured note) | 1.5–3% |
IFRA context: The limit is determined not by the total fragrance oil percentage but by the product category (leave-on/rinse-off) and the material itself. Always verify the IFRA limit from the current category guidelines and the fragrance oil's compliance declaration. Do not generalise; every formula must be assessed on its own profile.
Solubility & Blending
Because Gamma Nonalactone is a liquid, there is no need to heat and dissolve it as you would a solid material. It dissolves readily in ethanol, DPG (dipropylene glycol), and IPM (isopropyl myristate). It is not water-soluble.
- Prepare a stock solution
A 10% solution is convenient for dose control: 1 g Gamma Nonalactone + 9 g DPG. Weigh by grams.
- Mix
As this is a liquid-to-liquid blend, a magnetic stirrer or manual shaking at room temperature is sufficient. No heat is required.
- Account for density
Its specific gravity is approximately 0.96–0.97 g/ml. Do not skip the gram-to-millilitre conversion when measuring by volume; otherwise you will encounter overflow or shortfall during bottling. Always weigh in grams and apply the density factor when converting to ml.
- Add to the formula
You can incorporate it after combining the concentrate with alcohol; no solubility issues will arise.
After blending, allow the composition to rest at room temperature (~15–20 °C) in the dark; this is maceration (the maturation of alcohol and fragrance oil). A cool environment slows the process — it does not accelerate it. If you wish to remove waxy deposits, apply chilling (~0–4 °C, ~24 hours) followed by cold filtration as a separate step after maceration is complete. Do not conflate these two stages.
Tips & Frequently Asked Questions
Used correctly, it adds a smooth body to a composition. A few practical notes, and a few common questions.
For stock solution details and raw material information, you can review the technical data on the product's esans.com.tr page.
Is Gamma Nonalactone really an aldehyde?
What do I do if the creamy scent becomes overpowering?
Does it improve longevity on its own?
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