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Cyclosia® (Firmenich)

Description

A beautifully radiant and diffusive floral note defines this classic perfumery staple. It presents the quintessential scent of lily-of-the-valley, complete with its dewy, green petal freshness and a powerful, blooming character. Subtle waxy undertones enhance the realism of the floralcy, while delicate hints of sweet melon and a touch of citrus provide a modern, aqueous lift. This olfactive profile makes Hydroxycitronellal, particularly the refined grade known as Cyclosia®, an indispensable material for creating the signature heart of luminous white floral fragrances.

As a foundational element in perfumery, its primary application lies in the construction of classic floral bouquets, especially muguet, lilac, and cyclamen accords. It imparts significant volume and a clean, sweet tenacity to a composition, acting as a powerful heart note that seamlessly blends with citrus top notes and musky or woody bases. A long-established aldehyde, the use of Hydroxycitronellal is a hallmark of traditional floral perfumery, often dosed from trace amounts to substantive percentages to achieve the desired bloom. The quality of Cyclosia® ensures a consistent and pure expression for both fine fragrance and consumer product applications.

General Information

CategoryAromatic Compound
IUPAC Name7-hydroxy-3,7-dimethyloctanal
CAS Number107-75-5
Molecular Weight172.26 g/mol
Canonical SMILESCC(CCCC(C)(C)O)CC=O

Organoleptic Properties

Odor Family
Floral
Odor Strength
1
2
3
4
5
Odor DescriptionFloral, Lily, Sweet, Green, Waxy, Tropical, Melon, Citrus
Substantivity218 hours at 100%

Physical Properties

AppearanceColorless to pale yellow clear oily liquid (est)
Specific Gravity0.917 to 0.921 @ 25 °C.
Pounds per Gallon7.63 to 7.664
Refractive Index1.447 to 1.45 @ 20 °C.
Vapor Pressure0.003 mmHg @ 25 °C. (est)
Vapor Density5.9 ( Air = 1 )
Boiling Point241 °C. @ 760 mm Hg
Flash Point255 °F. TCC ( 123.89 °C. )
XLogP1.6
Acid Value3 max. KOH/g
StorageStore in cool, dry place in tightly sealed containers, protected from heat and light.

IFRA

Standardhttps://ifrafragrance.org/standards/IFRA_STD_043.pdf
CategoryFlavor and fragrance agents
Critical EffectDermal sensitization
Restrictions
Usage limits in the finished product
Cat. 1Category 1:0.38 %
Cat. 2Category 2:0.11 %
Cat. 3Category 3:2.3 %
Cat. 4Category 4:2.1 %
Cat. 5ACategory 5A:0.53 %
Cat. 5BCategory 5B:0.53 %
Cat. 5CCategory 5C:0.53 %
Cat. 5DCategory 5D:0.53 %
Cat. 6Category 6:1.2 %
Cat. 7ACategory 7A:4.3 %
Cat. 7BCategory 7B:4.3 %
Cat. 8Category 8:0.22 %
Cat. 9Category 9:4.1 %
Cat. 10ACategory 10A:15.00 %
Cat. 10BCategory 10B:15.00 %
Cat. 11ACategory 11A:8.2 %
Cat. 11BCategory 11B:8.2 %
Cat. 12Category 12:

Safety Information

PictogramsGHS07: Harmful
R-phrasesR36/38 - Irritating to eyes and skin
R41 - Risk of serious damage to eyes
R43 - May cause sensitisation by skin contact
S-phrasesS02 - Keep out of the reach of children
S24 - Avoid contact with skin
S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice
S36 - Wear suitable protective clothing
Europe Standard HazardXi - Irritant
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