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Guaiazulene

Guaiazulene

IUPAC name	1,4-dimethyl-7-isopropylazulene
Identifiers
CAS number	489-84-9
SMILES	CC2=C1C(C=C2) =C(C)C=C C(C(C)C)=C1
Properties
Molecular formula	C₁₅H₁₈
Molar mass	198.31 g/mol
Density	0.976 g/cm³
Melting point	31-33 °C
Boiling point	153 °C (7 mm Hg)
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) Infobox disclaimer and references

Guaiazulene, also azulon or 1,4-dimethyl-7-isopropylazulene, is a dark blue crystalline hydrocarbon and a derivative of azulene. Specifically, it is a bicyclic sesquiterpene that occurs naturally as a constituent of some essential oils, mainly oil of guaiac and chamomile oil, which also serve as its commercial sources. Various soft corals also contain guaiazulene as a principal pigment.

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Guaiazulene is an FDA-approved cosmetic color additive. It is also a common component of cosmetics like shampoos or skin care products with other skin soothing compounds such as allantoin.

Guaiazulene has applications as an anti-ulcer drug, and can be also used as a volatile dye with a known evaporation rate to indicate end of use of various products (such as insecticide strips.)