Indene is an important aromatic unsaturated hydrocarbon raw material widely used in fine chemical industry, synthetic resin, pharmaceutical synthesis and rubber additives. It has a reactive double bond and fused ring structure, easily undergoing polymerization, addition, alkylation and condensation reactions. It is mainly used for the production of coumarone-indene resin, petroleum resin and thermoplastic resins, which are widely applied in adhesives, coatings, inks and rubber compounding materials. In pharmaceutical and pesticide synthesis, it acts as a key intermediate for manufacturing anti-inflammatory drugs, antibacterial agents and heterocyclic derivatives. It is also used in organic synthesis for preparing fragrances, surfactants and high-purity organic reagents, as well as in academic research on polymerization mechanism and aromatic compound derivatization. With active chemical properties, it serves as a fundamental building block for synthesizing various high-value downstream fine chemicals.

Indene is a flammable liquid with moderate irritation and certain health hazards. Its vapor may form explosive mixtures with air; inhalation of vapor or mist can irritate respiratory tract, causing dizziness, headache, cough and throat discomfort. Direct skin contact may lead to degreasing, dryness, redness and allergic irritation; prolonged contact may cause dermatitis. Eye contact can result in congestion, burning pain and temporary visual discomfort. Accidental ingestion may cause nausea, vomiting and gastrointestinal irritation. Keep away from fire, heat source and static electricity during operation; work in a well-ventilated fume hood, wear flame-retardant lab coat, chemical-resistant gloves and safety goggles. Avoid contact with strong oxidants and strong acids to prevent polymerization and exothermic reaction. Store tightly sealed under nitrogen protection to prevent auto-oxidation and polymerization. Waste liquid and contaminated containers must be disposed of in accordance with hazardous waste and flammable chemical regulations, and shall not be discharged arbitrarily to avoid fire risk and environmental pollution.