The Marine Accord: Calone, Helional & Ultrazur
The Marine Accord: Calone, Helional & Ultrazur
The smell of sea air was long thought impossible – until a handful of synthetic molecules made it plausible and launched a whole genre: the aquatic wave of the 1990s. This page shows which building blocks make up a marine accord, and introduces the three molecules we stock for it: Calone, Helional and Ultrazur.
Where the sea note comes from
The key molecule was not invented for perfumery. In 1966, J. J. Beereboom at Pfizer was researching sedative compounds with a benzodiazepine-like structure – close to Valium. One of them was useless as a drug but smelled astonishingly of sea and watermelon. Pfizer patented it for fragrance: Calone 1951 was born.
By the late eighties the “sea note” had reached the big launches: Davidoff Cool Water (1988), Calvin Klein Escape (1991), Issey Miyake L’Eau d’Issey (1992), later Acqua di Gio. The effect – salty, ozonic freshness – defined a whole decade.
The three building blocks in detail
Calone – the engine
Calone (watermelon ketone, CAS 28940-11-6) is the heart of almost every sea note: a powerful, ozonic-salty freshness with a clear watermelon tone. It is very strong – Escape uses it at around 0.8%, L’Eau d’Issey (men’s) at about 0.4%. Overdosed it turns screechy; as a fraction of a percent it shows its full effect.
Helional – the green transparency
Helional (CAS 1205-17-0) takes the edge off Calone. It adds a green-floral, cyclamen-like transparency and keeps the accord airy rather than synthetic. This very interplay sits inside Cool Water. More in the Helional reference.
Ultrazur – the radiance
Ultrazur is a ready-made marine base by Givaudan built around the captive molecule Azurone. Azurone is Givaudan’s answer to Calone – even stronger and more diffusive, effective in pure form at just 0.025–0.06%, and especially substantive on fabrics. Ultrazur brings this radiant sea note into the formula ready to use. More in the Ultrazur reference and in the story Ultrazur & Shiokaze.
How to build a marine accord
A convincing sea accord needs three roles: body, transparency and radiance. A proven starting point:
- Body – Calone as the melon-salty base (a fraction of a percent).
- Transparency – Helional for green-floral airiness that smooths the edge.
- Radiance – Ultrazur for diffusive, tenacious sea width.
From there you refine: Hedione gives floral lift and volume, an Ambroxan material such as Ambrofix adds salty skin-warmth and length, and citrus like bergamot or grapefruit provides the fresh opening. Important: these molecules are powerful – always dose in dilution and approach in small steps.
Data sheet: the marine molecules
| Molecule | CAS / type | Character | Practical dosage |
|---|---|---|---|
| Calone (watermelon ketone) | 28940-11-6 | ozonic-salty, watermelon | 0.1–0.5% (up to ~0.8%) |
| Helional | 1205-17-0 | green-floral, cyclamen-like, transparent | fractions to a few % |
| Ultrazur (on Azurone) | Givaudan base | marine-ozonic, diffusive, tenacious | sparingly – approach slowly |
No warranty – always check the current IFRA amendment for the relevant category before use. Dosages are practical guide values.
Common mistakes
- Calone overdosed – quickly turns screechy and “cheap”. Less is more.
- Only one molecule – alone, any sea note stays flat. Only body + transparency + radiance give depth.
- Dosed without dilution – with such strong materials this leads to missteps; work in a 10% solution.
Frequently asked questions
Which molecule makes the “sea note”?
Above all Calone (watermelon ketone) – the ozonic-salty, watermelon-like freshness. Helional and Ultrazur round and reinforce it.
What is the difference between Calone and Azurone/Ultrazur?
Calone is the 1966 classic. Azurone, the base of Ultrazur, is Givaudan’s newer, even stronger and more diffusive answer – effective in tiny amounts and very tenacious.
How much Calone do you use?
Usually 0.1–0.5%, rarely up to about 0.8%. Overdosing sounds screechy.
What is Helional good for in the marine accord?
It brings green-floral transparency and takes the synthetic edge off Calone – the accord feels airier and more natural.