Overview
Propyl Levulinate is an ester derived from levulinic acid and propanol. It is widely used in the flavor and fragrance industry due to its mild fruity aroma, resembling apple or berry notes. As a versatile chemical intermediate, it also finds applications in pharmaceuticals and agrochemical synthesis. Its production typically involves esterification of levulinic acid with propanol under acidic conditions. The compound is valued for its stability and compatibility with other organic materials, making it a preferred choice for formulators seeking ester-based solvents or carriers.
Physical and Chemical Properties
Propyl Levulinate is a colorless to slightly yellow liquid with a density close to water (∼1.01 g/cm³). It has a characteristic fruity odor and a boiling point range of 210-215°C, which makes it suitable for high-temperature applications. The ester group in its structure contributes to its solubility in common organic solvents like ethanol and acetone. Chemically, it exhibits typical ester properties, including susceptibility to hydrolysis under strongly acidic or alkaline conditions. Its stability at room temperature and low volatility ensure easy handling in industrial settings. The molecular weight of 158.20 g/mol classifies it as a medium-sized organic molecule.
Main Applications
In the food industry, Propyl Levulinate serves as a flavor enhancer in baked goods, candies, and beverages, often blended with other esters to create complex fruity profiles. Perfumers utilize its subtle aroma in personal care products like soaps and lotions. Beyond fragrances, it acts as a building block in pharmaceutical synthesis, particularly for prodrug formulations. Agrochemically, it is explored as a solvent for pesticides due to its biodegradability. Recent research also investigates its potential as a green solvent or biofuel additive, leveraging its renewable origin from biomass-derived levulinic acid.
Safety and Storage
While Propyl Levulinate is generally low in toxicity, industrial users should adhere to standard chemical handling protocols. Skin contact may cause mild irritation, necessitating gloves and protective clothing. Adequate ventilation is recommended to avoid vapor accumulation. Storage requires inert containers (e.g., HDPE or glass) in well-ventilated areas away from oxidizers. Shelf life typically exceeds two years when stored below 30°C. Spills should be contained with absorbent materials and disposed of as organic waste, complying with local environmental regulations.
B2B Procurement Guide
Buyers should prioritize suppliers with ISO certification and detailed COA (Certificate of Analysis) specifying purity (≥98%) and moisture content. Batch-to-batch consistency is critical for flavor/fragrance applications. Consider manufacturers with biomass-derived production routes for sustainability-focused supply chains. Pricing varies based on order volume (bulk discounts apply) and purity grade. Sample testing for odor profile and solubility is advised before large purchases. Logistics should ensure temperature-controlled transport if ordered in warmer climates to preserve quality.
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