Overview
2-Coumaranone (C8H6O2) is a benzofuran derivative with a lactone ring structure. It serves as a versatile intermediate in organic synthesis, particularly in pharmaceutical and fragrance industries. Its mild aromatic properties and reactivity make it valuable for constructing complex molecules. First synthesized in the early 20th century, 2-coumaranone is now produced industrially via oxidation or cyclization processes. Its stable crystalline form ensures ease of handling in B2B transactions, though purity grades (e.g., 98%, 99%) must be specified for end-use compatibility.
Physical and Chemical Properties
2-Coumaranone is a pale yellow to white crystalline solid with a density of approximately 1.28 g/cm³. It melts at 46-48°C and boils at 245-247°C, indicating moderate thermal stability. The compound is soluble in common organic solvents like ethanol and acetone but exhibits limited water solubility. Its key chemical feature is the lactone ring, which undergoes hydrolysis under strong alkaline conditions. The aromatic benzofuran core contributes to UV absorption, making it useful in spectroscopic analysis. Stability tests show minimal degradation when stored properly, though prolonged exposure to moisture should be avoided.
Main Applications
In pharmaceuticals, 2-coumaranone is a precursor for anticoagulants and anti-inflammatory agents. Its structure is incorporated into active pharmaceutical ingredients (APIs) through reactions like alkylation or condensation. The fragrance industry utilizes it to synthesize woody and floral notes, especially in perfumes and soaps. Agrochemically, it aids in producing pesticides and herbicides due to its heterocyclic reactivity. Emerging research explores its role in OLED materials and photostabilizers, though these applications remain niche.
Safety and Storage
2-Coumaranone is classified as an irritant (GHS07). Direct contact with skin or eyes may cause redness or discomfort. Always use gloves, goggles, and fume hoods during handling. In case of exposure, rinse thoroughly with water and seek medical advice if symptoms persist. Store in tightly sealed containers under inert gas (e.g., nitrogen) to prevent oxidation. Ideal storage temperatures range from 2-8°C for long-term preservation. Bulk shipments require climate-controlled transport to avoid melting or clumping.
B2B Procurement Guide
When sourcing 2-coumaranone, prioritize suppliers with ISO 9001 or GMP certifications to ensure consistent quality. Request COA (Certificate of Analysis) detailing purity (≥98%), residual solvents, and heavy metal content. Pricing varies by order volume; bulk purchases (100+ kg) often reduce costs by 10-20%. Sample testing is recommended to verify compatibility with your process. For international shipments, confirm compliance with REACH or TSCA regulations to avoid customs delays.
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