Overview
delta-Valerolactone (δ-valerolactone) is a five-membered cyclic ester belonging to the lactone family. It is chemically synthesized via the oxidation of cyclopentanone or through esterification reactions. The compound is valued for its versatility in industrial and pharmaceutical applications due to its stable cyclic structure and reactivity as an intermediate. In B2B markets, δ-valerolactone is commonly supplied in bulk quantities by chemical manufacturers specializing in fine chemicals. Its demand is driven by niche applications in fragrance formulation and polymer production, where its mild odor and solvency properties are advantageous.
Physical and Chemical Properties
delta-Valerolactone is a colorless, low-viscosity liquid with a faint, characteristic odor. Its cyclic ester structure grants it moderate polarity, making it soluble in both water and organic solvents like ethanol or acetone. The compound is stable at room temperature but may polymerize under strong acidic or basic conditions. Key thermodynamic properties include a boiling point of 207-209°C and a melting point of -31°C, indicating its suitability for reactions requiring elevated temperatures. Its density (1.045 g/cm³) and refractive index (1.432 at 20°C) are critical for quality control in industrial batches.
Main Applications
In pharmaceuticals, δ-valerolactone serves as a building block for synthesizing active ingredients, particularly in antiviral and anti-inflammatory drugs. Its lactone ring is a reactive site for further chemical modifications. The fragrance industry utilizes δ-valerolactone as a subtle, fruity note in perfumes and flavorings. Additionally, it acts as a high-boiling solvent for resins and cellulose derivatives, offering advantages over traditional solvents due to its low toxicity and biodegradability.
Safety and Storage
While δ-valerolactone is not classified as highly hazardous, proper handling is essential. It may cause mild skin or eye irritation upon direct contact. Use nitrile gloves and goggles when handling, and ensure adequate ventilation to avoid vapor accumulation. Storage recommendations include keeping the chemical in tightly sealed stainless steel or polyethylene containers away from heat sources. Incompatible materials include strong oxidizers and bases, which may induce polymerization. Shelf life typically exceeds two years when stored under ideal conditions.
B2B Procurement Guide
When sourcing δ-valerolactone, B2B buyers should prioritize suppliers with demonstrated expertise in lactone chemistry. Key procurement criteria include batch purity (98% minimum), residual solvent levels, and packaging options (e.g., 200kg drums or ISO tanks for bulk orders). Request certificates of analysis (CoA) and safety data sheets (SDS) to verify compliance with regional regulations like REACH or TSCA. For pharmaceutical-grade material, ensure the supplier follows GMP guidelines. Price negotiations should account for order volume, with discounts commonly available for contracts exceeding 1 metric ton annually.
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