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OP-11

Updated: 2026-07-15

Overview

OP-11, also known as Nonylphenol Ethoxylate, is a non-ionic surfactant widely used in industrial and commercial applications. It belongs to the family of alkylphenol ethoxylates and is valued for its emulsifying, wetting, and dispersing properties. Its molecular structure consists of a nonylphenol group attached to a polyethylene glycol chain. Due to its surfactant properties, OP-11 is commonly employed in formulations requiring stability and effectiveness in aqueous and non-aqueous systems. However, environmental and regulatory concerns have led to restrictions on its use in certain regions, particularly in consumer products.

Physical and Chemical Properties

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OP-11 is a viscous liquid at room temperature, with a density of approximately 1.06 g/cm³. It is soluble in both water and organic solvents, making it versatile for various formulations. The compound exhibits stability under normal conditions but may degrade at high temperatures or in the presence of strong acids or bases. Its non-ionic nature allows it to function effectively in a wide pH range, which is advantageous for applications in detergents and industrial cleaners. The molecular weight of OP-11 is around 660 g/mol, and its boiling point exceeds 200°C, indicating its thermal stability in many industrial processes.

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Main Applications

OP-11 is primarily used in the production of detergents, emulsifiers, and industrial cleaners. Its ability to reduce surface tension makes it ideal for formulations requiring wetting and dispersing agents. In the textile industry, it is used as a scouring and dyeing assistant. Additionally, OP-11 finds applications in agricultural chemicals, where it acts as an emulsifier in pesticide formulations. Its use in oilfield chemicals is also notable, particularly in enhanced oil recovery processes. However, due to environmental concerns, alternatives are being explored in many regions.

Safety and Storage

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OP-11 should be handled with care to avoid skin and eye contact. Personal protective equipment (PPE), including gloves and goggles, is recommended. Proper ventilation is essential to minimize inhalation risks. Storage conditions should be cool and dry, away from direct sunlight and oxidizing agents. Containers must be tightly sealed to prevent moisture absorption and contamination. Spills should be contained and cleaned promptly using appropriate absorbent materials.

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B2B Procurement Guide

When procuring OP-11, verify the CAS number (9016-45-9) and purity specifications to ensure product quality. Suppliers should provide material safety data sheets (MSDS) and comply with regional regulations. Bulk purchases may offer cost advantages, but storage capacity and shelf life should be considered. Due to regulatory restrictions in some areas, it is advisable to explore alternative surfactants if OP-11 is prohibited or limited in your region. Always source from reputable suppliers with a track record of compliance and reliability.

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