Propyl Propionate
Overview
Propyl propionate is a colorless, volatile ester with a characteristic fruity odor, widely used in the flavor and fragrance industry. It is synthesized via esterification of propionic acid with propanol, yielding high purity (>99%) grades suitable for food and industrial applications. As a versatile solvent, it exhibits excellent compatibility with resins, cellulose derivatives, and oils, making it a preferred choice in coatings, inks, and cleaning formulations. Its low toxicity and favorable evaporation rate further enhance its utility in B2B sectors.
Physical and Chemical Properties
Propyl propionate has a molecular weight of 116.16 g/mol and a density of 0.88 g/cm³. Its low melting point (-76°C) and moderate boiling point (122-124°C) ensure easy handling and rapid drying in solvent applications. The ester is slightly soluble in water but readily mixes with alcohols, ethers, and hydrocarbons. Its stability under normal conditions and mild reactivity (avoid strong oxidizers) make it a reliable component in formulations requiring controlled volatility and odor profiles.
Main Applications
In the food industry, propyl propionate serves as an artificial flavoring agent for fruity notes (e.g., apple, pear) in candies and beverages. Fragrance manufacturers utilize it in perfumes and soaps for its sweet, ethereal aroma. Industrially, it acts as a solvent for nitrocellulose, acrylic resins, and printing inks. Its rapid evaporation and low residue properties are valued in paint thinners and degreasers. Specialty applications include use as a reaction intermediate in pharmaceutical synthesis.
Safety and Storage
Classified as a flammable liquid (Flash point: 22°C), propyl propionate requires storage in tightly sealed containers away from heat and open flames. Ventilation is critical to prevent vapor accumulation. Personal protective equipment (PPE) such as nitrile gloves and chemical goggles is recommended during handling. Spills should be contained with inert absorbents. Disposal must comply with local regulations for organic solvents.
B2B Procurement Guide
Bulk buyers should prioritize suppliers offering GC/MS certificates to validate purity (≥99%). Packaging options include 200L steel drums or ISO tank containers for large orders. Key procurement considerations include batch consistency, lead times, and compliance with standards like FDA 21 CFR for food-grade use. Sample testing is advised to confirm suitability for specific applications. Prices fluctuate with raw material (propionic acid) costs and order volume.
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