Calone

Origin

Calone, full commercial name Calone 1951, is a synthetic molecule of the benzodioxepinone family, molecular formula C10H10O3, molar mass 178.2 g/mol. Its IUPAC name is 7-methyl-2H-1,5-benzodioxepin-3(4H)-one. It is known in the industry under the figurative name of watermelon ketone, in reference to its characteristic melon and watermelon effect (Wikipedia, accessed 31 May 2026).

The molecule was synthesized for the first time in 1966 by chemists J. J. Beereboom, D. P. Cameron and C. R. Stephens at the American laboratories of Pfizer (New York, United States). The name Calone is an acronym of Camilli, Albert and Laloue, a Grasse perfumery house founded in Grasse, France, in 1830, acquired by Pfizer in 1963 and folded into its aromatic branch. The 1951 code is not a year but an internal reference number of the watermelon-scented compound (Fragrantica, accessed 31 May 2026).

Olfactive profile

Calone offers an aqueous, melon, marine and ozonic profile. It evokes the iodine air of an Atlantic shoreline at dawn, with a fruity backdrop close to watermelon and green melon skin, crossed by a sensation of ozone after a storm. Its pyramid position sits mainly in the top and heart, where it acts as a trigger of freshness and airy openness. Its sillage is volatile but its presence remains legible for several hours thanks to its intrinsic power.

Calone is very powerful. Its typical concentration in commercial formulas sits between 0.1 and 1.5 percent, sometimes up to 2 percent in sport and signature aquatic compositions. Above this range, the effect becomes invasive and pulls the composition toward a dated 1990s shampoo or household-product register. Contemporary perfumers dose it as a touch, paired with Helional, Floralozone, Hedione or Algenone, to round out the marine accord without overload.

Key characteristics

Synthesis and production

Calone does not exist in nature in this form, even if its structure recalls brown algae pheromones such as ectocarpene. It is produced by organic synthesis starting from 4-methylcatechol, through condensation and then cyclization to form the seven-membered benzodioxepinone skeleton carrying a methyl group in position 7. Its official CAS number is 28940-11-6.

Several industrial suppliers market the molecule today:

• Pfizer and successors: the historic producer, registered trademark Calone 1951.
• Givaudan, Firmenich, Symrise, IFF: production under the generic name methylbenzodioxepinone after patent expiry.
• Asian producers: large-scale entry in the 2000s, at reduced cost.

Firmenich has developed a variant named Cascalone, a softer floral-aqueous version of Calone, designed for transparent feminine compositions (Wikipedia, accessed 31 May 2026). On the regulatory side, Calone is not subject to severe IFRA restrictions and remains widely used in functional perfumery, personal care, household products and fine fragrance.

History in perfumery

Between 1966 and the mid-1980s, Calone remained confidential. It was used in trace dosages within certain floral accords, notably to reinforce lily of the valley, without forming an autonomous olfactive signature. The aquatic family did not exist as such in the industrial classification at the time.

The shift came in 1988 with New West for Her by Aramis, composed by perfumer Yves Tanguy. This fragrance is generally regarded as the first to use Calone at a structural dosage, around 1.2 percent of the formula. The same year, Cool Water by Davidoff, composed by Pierre Bourdon, exploited Calone for its marine and masculine opening and installed the molecule in mainstream perfumery.

In 1992, L'Eau d'Issey by Issey Miyake, composed by Jacques Cavallier, moved Calone into the feminine register with a lotus, melon and lily of the valley accord that became a global blockbuster. Four years later, Acqua di Gio pour Homme by Giorgio Armani (1996), composed by Alberto Morillas, sealed the identity of the masculine aquatic family and turned Calone into one of the most recognizable ingredients of the 1990s.

After 2000, Calone remained a daily tool of perfumers but left signature compositions. Its 1990s overexposure earned it a dated reputation, and contemporary perfumers dose it more discreetly, in combination with other less recognizable aqueous or ozonic notes, to suggest freshness without directly quoting the 1990s aesthetic. Niche perfumery has gradually rediscovered the molecule from the 2010s onward, in a more mineral and more lunar reading of marine freshness.

Notable perfumes featuring Calone

Six compositions are cited as decisive moments in the history of Calone in commercial perfumery, across the 1988 to 1996 arc. The selection covers the founding overdose, the mainstream masculine adoption, the first Asian reading of the aquatic, the feminine global blockbuster, the masculine signature of the decade, and the Mediterranean mineral interpretation.

Frequently asked questions

See also