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Polycyclic organic compounds, Vat dyes, Cyclic compounds

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Aromatic compounds (2)
Dyes (2)
Polycyclic aromatic compounds (2)
Anthraquinone dyes (1)
Phenol dyes (1)

CADALENE (483-78-3)  
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. Cadalene, together with retene, simonellite and ip-iHMN, is a biomarker of higher plants, which makes it useful for paleobotanic analysis of rock sediments.
naphthalene (91-20-3, 68412-25-9)  
Naphthalene is an organic compound with formula C 10H 8. It is the simplest polycyclic aromatic hydrocarbon, and is a white crystalline solid with a characteristic odor that is detectable at concentrations as low as 0.08 ppm by mass. As an aromatic hydrocarbon, naphthalene's structure consists of a fused pair of benzene rings.
PYRENE (129-00-0)  
Pyrene is a polycyclic aromatic hydrocarbon (PAH) consisting of four fused benzene rings, resulting in a flat aromatic system. The chemical formula is C 16H 10. This colorless solid is the smallest peri-fused PAH (one where the rings are fused through more than one face).
CHRYSENE (65996-93-2, 50-32-8, 218-01-9)  
Chrysene is a polycyclic aromatic hydrocarbon (PAH) with the molecular formula C 18H 12 that consists of four fused benzene rings. It is a natural constituent of coal tar, from which it was first isolated and characterized. It is also found in creosote at levels of 0.5-6 mg/kg.
ACENAPHTHENE (83-32-9)  
Acenaphthene is a polycyclic aromatic hydrocarbon (PAH) consisting of naphthalene with an ethylene bridge connecting positions 1 and 8. It is a colourless solid. Coal tar consists of about 0.3% of this compound.
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Polycyclic organic compounds
Vat dyes
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