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Xanthone
Other Names: 9H-Xanthen-9-one, Dibenzo-γ-pyrone
CAS Number: 90-47-1
Sum Formula: C₁₃H₈O₂
Molar Mass: 196.20 g/mol
Appearance: Pale yellow crystalline powder

Xanthone is a polycyclic aromatic ketone consisting of a dibenzo-γ-pyrone skeleton. It serves as a valuable intermediate in organic synthesis and is also used as a building block in the preparation of dyes, pigments, and functional organic materials. Due to its aromatic and ketone functionalities, it exhibits interesting photochemical and electronic properties.

Chemical and Physical Properties
Density: ~1.23 g/cm³
Melting Point: 173–174°C
Boiling Point: ~358°C
Solubility in Water: Practically insoluble
Solubility in Organic Solvents: Soluble in ethanol, acetone, chloroform, and other organic solvents
Stability: Stable under normal conditions; light-sensitive

Applications
Intermediate in the synthesis of dyes, pigments, and specialty chemicals
Applied in materials science for photophysical studies and as a fluorophore scaffold
Used in research on heterocyclic and polycyclic aromatic compounds
Laboratory reagent in organic transformations

Safety

Signal Word: Danger

First Aid Measures
Eye Contact: Rinse thoroughly with water for several minutes. Seek medical attention if irritation persists
Skin Contact: Wash with soap and water. Remove contaminated clothing
Inhalation: Move to fresh air. Seek medical attention if respiratory symptoms occur
Ingestion: Rinse mouth with water. Do not induce vomiting. Seek medical advice if unwell

Handling and Storage
Store in a tightly closed container in a cool, dry, and well-ventilated area
Protect from light and moisture
Avoid dust formation and inhalation