Title: Cadalene
CAS Registry Number: 483-78-3
CAS Name: 1,6-Dimethyl-4-(1-methylethyl)naphthalene
Additional Names: 4-isopropyl-1,6-dimethylnaphthalene; cadalin
Molecular Formula: C15H18
Molecular Weight: 198.30
Percent Composition: C 90.85%, H 9.15%
Literature References: Obtained from cadinene and other sesquiterpenes or sesquiterpene alcohols by dehydrogenation: Ruzicka, Meyer, Helv. Chim. Acta 4, 505 (1921); Ruzicka, Stoll, ibid. 7, 84 (1924). Synthesis: Ruzicka, Seidel, ibid. 5, 369 (1922); Barnett, Cook, J. Chem. Soc. 1933, 22; Johnson, Jones, J. Am. Chem. Soc. 69, 792 (1947); Kohli et al., Experientia 28, 131 (1972).
Properties: Liquid. d425 0.9667. bp720 291-292°; bp10 149°. nD25 1.5785. uv max: 228, 232, 280, 284, 295, 310, 317, 325 nm. Insol in water. Sol in fat solvents, oils.
Boiling point: bp720 291-292°; bp10 149°
Index of refraction: nD25 1.5785
Absorption maximum: uv max: 228, 232, 280, 284, 295, 310, 317, 325 nm
Density: d425 0.9667
Cadaverine Cadexomer Iodine Cadherins Cadinenes Cadmium Acetate

Skeletal formula
Ball-and-stick model
CAS number 483-78-3
PubChem 10225
ChemSpider 9808
Jmol-3D images Image 1
Molecular formula C15H18
Molar mass 198.30342
Appearance Colorless liquid
Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
Infobox references

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]

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]