sec-Octylphenol

Updated: 2026-09-19

Overview

sec-Octylphenol is an organic compound belonging to the alkylphenol family, characterized by a phenolic group attached to a branched octyl chain. It is primarily used as an intermediate in the production of surfactants, resins, and other industrial chemicals. Its moderate volatility and solubility in organic solvents make it versatile for various formulations. Industrially, sec-Octylphenol is synthesized through the alkylation of phenol with octene. The compound's properties, such as its hydrophobic nature and reactivity, make it valuable in creating nonionic surfactants and stabilizing agents for polymers and coatings.

Physical and Chemical Properties

sec-Octylphenol is a colorless to pale yellow liquid with a distinct phenolic odor. It has a density of 0.94-0.96 g/cm³ and a boiling point range of 280-290°C. The compound is insoluble in water but dissolves readily in most organic solvents, including alcohols, ethers, and hydrocarbons. Chemically, sec-Octylphenol exhibits typical phenol reactivity, such as forming salts with bases and undergoing electrophilic substitution reactions. Its branched alkyl chain provides steric hindrance, influencing its behavior in polymerization and surfactant applications. Stability under normal conditions is good, but it should be protected from strong oxidizers to prevent decomposition.

Main Applications

The primary use of sec-Octylphenol is in the manufacture of nonionic surfactants, particularly ethoxylates, which are widely used in detergents, emulsifiers, and wetting agents. These surfactants are valued for their stability and performance in both industrial and household products. Additionally, sec-Octylphenol serves as a key intermediate in producing phenolic resins, plasticizers, and rubber chemicals. Its compatibility with polymers makes it useful in coatings and adhesives, where it enhances flexibility and adhesion. Specialty applications include its role in oilfield chemicals and agrochemical formulations.

Safety and Storage

sec-Octylphenol is classified as an irritant to skin, eyes, and respiratory systems. Proper personal protective equipment (PPE), including gloves and goggles, should be worn when handling the chemical. Adequate ventilation is necessary to avoid inhalation of vapors. Storage should be in tightly sealed containers, placed in a cool, dry, and well-ventilated area away from direct sunlight and oxidizers. Spills should be contained and cleaned up promptly using inert absorbents. Always refer to the Safety Data Sheet (SDS) for detailed handling and disposal guidelines.

B2B Procurement Guide

When procuring sec-Octylphenol, verify the CAS number (94-68-8) to ensure product authenticity. Key specifications to check include purity (typically 98-99%), moisture content, and residual phenol levels. Reputable suppliers often provide certificates of analysis (CoA) for quality assurance. Bulk purchases (e.g., drum or tanker quantities) may offer cost advantages. Consider logistics, such as shipping regulations for hazardous chemicals, and evaluate supplier reliability based on industry reputation and compliance with safety standards. Negotiate pricing based on volume and long-term contracts where applicable.