Overview
1-Indanone is a bicyclic aromatic ketone that serves as a versatile building block in organic synthesis. Its fused benzene and cyclopentanone structure makes it valuable for creating complex molecules. Industrially produced through Friedel-Crafts acylation of indane, it's classified as a specialty chemical with annual global production estimated in hundreds of metric tons. As a key chiral intermediate, 1-indanone's derivatives appear in various FDA-approved drugs, particularly in cardiovascular and CNS therapeutics. The compound's stability and predictable reactivity profile contribute to its widespread adoption in process chemistry at pilot and production scales.
Physical and Chemical Properties
1-Indanone exhibits typical ketone characteristics with moderate polarity (logP ~1.8). The crystalline solid shows UV absorption maxima at 248 nm and 282 nm, useful for analytical detection. Its carbonyl group undergoes standard nucleophilic addition reactions while the aromatic ring allows electrophilic substitutions under controlled conditions. The compound demonstrates good thermal stability below 200°C but may decompose at higher temperatures. Vapor pressure is relatively low (0.01 mmHg at 25°C), reducing volatility concerns during handling. In solution, it shows keto-enol tautomerism with the keto form predominating (>99% in neutral conditions).
Main Applications
In pharmaceuticals, 1-indanone derivatives form the core structure of several ACE inhibitors and dopamine agonists. It's particularly valuable for synthesizing indane-based scaffolds in drug discovery programs targeting GPCRs and enzymes. The agrochemical industry utilizes it in producing certain fungicides and plant growth regulators. Fragrance applications leverage its woody-herbal odor profile, often as a precursor to musk compounds. Recent research explores its use in organic electronics as a building block for π-conjugated materials. About 60% of production serves pharmaceutical applications, with 25% going to fragrance synthesis and 15% to other specialty chemical uses.
Safety and Storage
Classified as harmful if swallowed (H302) and irritating to eyes (H319), 1-indanone requires standard laboratory precautions including gloves and eye protection. The dust may form explosive mixtures with air (LEL ~1.1% v/v). Spills should be contained with inert absorbents and disposed as hazardous waste. For long-term storage, maintain under nitrogen atmosphere in amber glass or polyethylene containers. Shelf life typically exceeds 24 months when stored below 30°C. Incompatible with strong oxidizers and reducing agents—separate storage required. Transportation generally falls under UN1325 (Flammable Solids, Class 4.1) for international shipments.
B2B Procurement Guide
Industrial buyers should specify purity requirements (typically 98-99.5%) and analytical methods (GC/HPLC). Pharmaceutical-grade material requires additional documentation including residual solvent reports and heavy metal analysis. Lead times vary from 2-8 weeks depending on quantity (metric ton purchases often require production scheduling). Quality verification should include melting point determination, FTIR fingerprint matching, and impurity profiling. Consider suppliers with ISO 9001 certification and REACH compliance for EU markets. For Asian sourcing, verify the manufacturer's CEP (Certificate of Suitability) status if supplying to regulated drug applications. Bulk pricing shows volume discounts at 100kg+ quantities.
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