2-Ethylhexylamine CAS 104-75-6

Introduction to 2-Ethylhexylamine

2-Ethylhexylamine is a primary aliphatic amine with an ethyl branch at the alpha carbon adjacent to the amino group. The branched structure imparts a low pour point, good solvent compatibility and balanced surface activity. It appears as a colorless to pale yellow liquid at room temperature, with a characteristic amine odor. It is slightly soluble in water and fully miscible with alcohols, ethers and most common organic solvents.

Industrial production follows controlled amination processes with final fractional distillation to achieve target purity. The compound exhibits typical primary amine reactivity, forming salts with acids, undergoing alkylation reactions, and absorbing atmospheric carbon dioxide to form carbonate salts.

2-Ethylhexylamine Chemical & Physical Properties

Applications of 2-Ethylhexylamine

Emulsifier and surfactant intermediates: Reacts with fatty acids to form amide emulsifiers, or undergoes quaternization to produce cationic surfactants. The branched structure enhances emulsion stability and low-temperature flowability for agrochemical and industrial cleaning formulations.

Corrosion inhibitors: Used in metalworking fluids and oilfield systems. It adsorbs onto metal surfaces to form protective barriers, inhibiting corrosion from acidic media. The branched structure improves film density and coverage.

Polyurethane catalysts: Acts as a co-catalyst and chain extender in polyurethane foam systems, balancing blowing and gelling reactions. The branched structure delivers moderate reaction rates and improved foam flexibility.

Rubber processing aids: Serves as an intermediate for rubber vulcanization accelerators, or as a dispersing agent to improve processing flow and filler distribution in rubber compounding.

Storage & Safety Precautions for 2-Ethylhexylamine

• Store in tightly sealed containers, preferably under nitrogen blanket. Exposure to air causes carbon dioxide absorption and carbonate formation, leading to turbidity and reduced active amine value. Keep away from strong acids and oxidizing agents.
• Handle as a corrosive material. Wear chemical splash goggles, nitrile gloves and chemical-resistant clothing during bulk transfer. Work in well-ventilated areas to avoid amine vapor inhalation.
• Classified as a flammable liquid. Keep away from open flame, heat sources and ignition sources. Bond and ground all transfer equipment to prevent static buildup.

2-Ethylhexylamine FAQ

Q: What is 2-Ethylhexylamine mainly used for in industry?

A: It acts as an intermediate for emulsifiers, corrosion inhibitors, PU catalysts and cationic surfactants across agrochemical, metalworking and polymer applications.

Q: Why does 2-Ethylhexylamine turn cloudy in open containers?

A: It absorbs atmospheric CO₂ to form insoluble carbonate salts. Store sealed under nitrogen to preserve clarity and active amine value.

Q: What safety measures apply to 2-Ethylhexylamine handling?

A: It is corrosive and flammable. Wear proper chemical PPE, handle in ventilated areas and keep away from ignition sources.