Overview
2-Heptanone, commonly referred to as methyl pentyl ketone, is an organic compound belonging to the ketone family. It is a colorless liquid with a distinctive fruity odor, making it useful in both industrial and flavoring applications. The compound is primarily synthesized through the oxidation of heptane or via the catalytic dehydrogenation of secondary alcohols. As a solvent, 2-heptanone is valued for its balanced evaporation rate and solvency power, which makes it suitable for formulations requiring moderate drying times. Its chemical stability and compatibility with resins and polymers further enhance its utility in coatings and adhesive industries.
Physical and Chemical Properties
2-Heptanone exhibits a boiling point of 151°C and a melting point of -35°C, indicating its stability under a wide range of temperatures. With a density of 0.816 g/cm³, it is lighter than water and forms a separate layer when mixed. The compound's slight water solubility (approximately 0.4% at 20°C) limits its use in aqueous systems but enhances its miscibility with organic solvents like ethanol and ether. Its vapor pressure (3.7 mmHg at 25°C) and flash point (46°C) classify it as a flammable liquid, necessitating careful handling. The fruity aroma of 2-heptanone is attributed to its ketone functional group, which also contributes to its reactivity in condensation and oxidation reactions.
Main Applications
In industrial settings, 2-heptanone serves as a key solvent for nitrocellulose, acrylic resins, and vinyl coatings due to its ability to dissolve these materials without causing degradation. It is also employed in adhesive formulations to adjust viscosity and improve bonding strength. The food and fragrance industries utilize 2-heptanone as a flavoring agent, imparting a creamy, fruity note to products like cheeses and baked goods. Additionally, it acts as an extraction solvent for essential oils and as a intermediate in pharmaceutical synthesis. Its low toxicity profile (when handled properly) makes it a preferred choice for these applications.
Safety and Storage
As a flammable liquid, 2-heptanone requires storage in tightly sealed containers away from heat sources and oxidizing agents. Ventilation is critical to prevent vapor accumulation, which can form explosive mixtures with air. Grounding containers during transfer minimizes static discharge risks. Personal protective equipment (PPE) such as gloves, goggles, and respirators should be used to avoid skin contact or inhalation. In case of spills, absorb with inert materials like sand and dispose of according to local regulations. First aid measures include rinsing exposed skin or eyes with water and seeking medical attention if irritation persists.
B2B Procurement Guide
When sourcing 2-heptanone, prioritize suppliers who provide certificates of analysis (CoA) detailing purity (≥98%), water content, and impurity levels. Bulk purchases in drums or intermediate bulk containers (IBCs) often yield cost savings, but verify compatibility with your storage infrastructure. Consider regional logistics: the compound’s flammability may restrict shipping options. Some manufacturers offer technical-grade 2-heptanone for industrial uses and food-grade variants for flavoring applications. Negotiate contracts with flexibility for volume adjustments, especially if market prices fluctuate due to raw material (heptane) availability.
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