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4-Octylphenol

Updated: 2026-08-05

Overview

4-Octylphenol is an organic compound belonging to the alkylphenol family. It is primarily used as an intermediate in the synthesis of surfactants, resins, and other industrial chemicals. The compound features an octyl group attached to the para position of a phenol ring, contributing to its hydrophobic properties. Due to its surfactant-like behavior, 4-octylphenol is valued in formulations requiring emulsification or wetting agents. However, its environmental and health impacts necessitate careful handling and compliance with regulatory standards, particularly in regions restricting alkylphenol ethoxylates (APEs).

Physical and Chemical Properties

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4-Octylphenol is a white to light yellow crystalline solid with a mild phenolic odor. It has a molecular weight of 206.33 g/mol and a density of approximately 0.93 g/cm³. The compound melts at 72-74 °C and boils around 280-290 °C under standard conditions. Its solubility profile favors organic solvents like ethanol and acetone, while it remains insoluble in water. This property makes it suitable for applications in non-aqueous systems. The octyl chain enhances lipophilicity, enabling its use in modifying surface tension in industrial processes.

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Main Applications

The primary use of 4-octylphenol is as a building block for nonionic surfactants, particularly alkylphenol ethoxylates (APEs), which are employed in detergents, agrochemicals, and textile processing. It also serves as a monomer in phenolic resins, contributing to heat resistance and adhesion properties. In coatings and adhesives, 4-octylphenol acts as a plasticizer or stabilizer. However, due to environmental concerns, alternatives are increasingly sought for consumer-facing applications. Industrial uses remain significant, especially in regions with less stringent regulations.

Safety and Storage

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4-Octylphenol is classified as an irritant to skin, eyes, and respiratory systems. Proper personal protective equipment (PPE), including gloves and goggles, is mandatory during handling. Prolonged exposure may require additional respiratory protection. Storage recommendations include keeping the compound in a cool, dry place away from oxidizing agents. Containers should be tightly sealed to prevent moisture absorption and degradation. Spills must be contained and disposed of according to local hazardous waste regulations.

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B2B Procurement Guide

When sourcing 4-octylphenol, prioritize suppliers with ISO or REACH certifications to ensure quality and regulatory compliance. Key specifications include purity (typically >98%), CAS number verification, and batch-specific COA (Certificate of Analysis). Bulk procurement (e.g., drum or ton quantities) often reduces costs. However, evaluate logistics for safe transportation, especially for international shipments. Alternative surfactants like fatty alcohol ethoxylates may be considered for eco-conscious buyers, though cost-performance trade-offs apply.

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