Cadalene or cadalin (4-isopropyl-1,6-dimethylnaphthalene) is a polycyclic aromatic hydrocarbon with a chemical formula C₁₅H₁₈ and a cadinane skeleton. It is derived from generic sesquiterpenes, and ubiquitous in essential oils of many higher plants.^[1]

Quick Facts Names, Identifiers ...

Cadalene

Names
IUPAC name 4-Isopropyl-1,6-dimethylnaphthalene
Preferred IUPAC name 1,6-Dimethyl-4-(propan-2-yl)naphthalene
Other names Cadalin
Identifiers
CAS Number	483-78-3
3D model (JSmol)	Interactive image
ChemSpider	9808
ECHA InfoCard	100.110.415
PubChem CID	10225
UNII	49X2436USB
CompTox Dashboard (EPA)	DTXSID40197483
InChI InChI=1/C15H18/c1-10(2)13-8-6-12(4)14-7-5-11(3)9-15(13)14/h5-10H,1-4H3 Key: VMOJIHDTVZTGDO-UHFFFAOYAQ
SMILES c12c(ccc(c1ccc(c2)C)C)C(C)C
Properties
Chemical formula	C15H18
Molar mass	198.30342
Appearance	Colorless liquid
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

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Cadalene, together with retene, simonellite and ip-iHMN, is a biomarker of higher plants, which makes it useful for paleobotanic analysis of rock sediments.

The ratio of retene to cadalene in sediments can reveal the ratio of the genus Pinaceae in the biosphere.^[2]