Overview
2-Ethylacrolein is an industrially important α,β-unsaturated aldehyde characterized by its reactive C=C and C=O functional groups. As a derivative of acrolein, it serves as a versatile building block in organic synthesis. The compound's reactivity makes it valuable for Michael additions, Diels-Alder reactions, and other condensation processes. Commercial production typically involves vapor-phase oxidation of appropriate hydrocarbons or aldol condensation pathways. Its primary value lies in specialty chemical synthesis rather than bulk applications, with strict quality control required due to its tendency to polymerize.
Physical and Chemical Properties
As a low-viscosity liquid with a pungent odor characteristic of unsaturated aldehydes, 2-ethylacrolein demonstrates typical carbonyl reactivity including nucleophilic addition and oxidation. The ethyl substituent increases steric hindrance compared to acrolein, moderating some reaction rates. The compound's conjugated double bond system makes it particularly reactive in polymerization and cycloaddition reactions. Technical grades often contain polymerization inhibitors (0.1-1% hydroquinone) to enhance shelf stability. Its vapor pressure of approximately 15 mmHg at 20°C necessitates careful handling to prevent inhalation exposure.
Main Applications
In pharmaceutical synthesis, 2-ethylacrolein serves as a precursor for heterocyclic compounds and chiral intermediates. The agrochemical industry utilizes it in manufacturing certain fungicides and plant growth regulators with specific alkyl chain requirements. Specialty polymer applications include modification of resin properties through copolymerization, where the ethyl group provides tailored hydrophobicity. Research applications focus on its use in multi-step syntheses of complex molecules, particularly where the ethyl moiety confers specific steric or electronic effects in the target compound.
Safety and Storage
Requires storage under inert atmosphere (nitrogen blanket) with temperature control below 25°C to prevent polymerization. Containers should be made of stainless steel or lined with appropriate polymers (PTFE/PFA). Personal protective equipment must include chemical-resistant gloves (nitrile or neoprene), splash goggles, and organic vapor respirators. Fire protection measures should address both flammability (flash point ~22°C) and potential exothermic polymerization. Spill containment requires non-combustible absorbents, never water spray due to solubility and vapor dispersion concerns.
B2B Procurement Guide
Technical specifications should include inhibitor type/concentration, purity (typically 95-99%), and water content (<0.5%). Batch certificates of analysis are essential for quality assurance. Logistics require UN-approved containers (typically UN 1993 Class 3 PG II) with proper hazard labeling. Minimum order quantities often range from 25kg to 200kg drum quantities. Preferred suppliers are specialty chemical producers with GMP capabilities for pharmaceutical-grade material. Sample testing should verify absence of peroxides and appropriate inhibitor levels before large-scale procurement.
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