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Nonionic ethoxylated alkylphenol surfactant with balanced hydrophilic-lipophilic properties.
Excellent wetting, emulsifying, and dispersing performance in aqueous systems.
Good compatibility with anionic, cationic, and other nonionic surfactants.
Stable across a broad pH range (pH 4–12) and tolerant to moderate electrolyte concentrations.
Low foaming profile suitable for high-shear industrial cleaning and formulation processes.
Industrial and institutional cleaners (I&I), including hard-surface degreasers and floor cleaners.
Agrochemical formulations—used as emulsifier and solubilizer in EC (emulsifiable concentrate) and SC (suspension concentrate) products.
Textile auxiliaries, especially for scouring, dye leveling, and pigment dispersion.
Metalworking fluids, where stable oil-in-water emulsions and corrosion inhibition support are required.
Paints and coatings—functions as a co-emulsifier and stabilizer in acrylic and styrene-butadiene latex systems.
| Chemical Type | Nonionic surfactant — octylphenol ethoxylate (approx. 7.9 mol EO) |
| Product Form | Liquid |
| Appearance | Pale yellow to amber viscous liquid |
| pH (1% aqueous solution, 20 °C) | 5.0–7.0 |
| Cloud Point (1% aqueous solution) | Approx. 68–72 °C |
| Active Content (by weight) | 99–100% |
| Solubility | Freely soluble in water and common organic solvents (e.g., alcohols, glycol ethers) |
| Storage Stability | Stable for ≥12 months at 5–30 °C in sealed original container |
Q1: What is the primary function of Lutensol ON 79 in industrial formulations?
A: Lutensol ON 79 is a nonionic surfactant based on alkylphenol ethoxylates, primarily used for its excellent wetting, emulsifying, and solubilizing properties in aqueous systems—especially in metalworking fluids, cleaning agents, and agrochemical concentrates.
Q2: Is Lutensol ON 79 suitable for low-foaming applications?
A: Yes, it exhibits inherently low foaming behavior, making it well-suited for high-shear or recirculating systems such as industrial cleaners and metalworking coolants where foam control is critical.
Q3: How does temperature affect the performance of Lutensol ON 79?
A: As a cloud point-type surfactant, its solubility and surface activity are temperature-dependent; it remains fully soluble at ambient temperatures but may undergo phase separation near its cloud point—typically observed above 60 °C—requiring formulation adjustments for high-temperature processes.
Q4: Can Lutensol ON 79 be used in combination with ionic surfactants?
A: Yes, it demonstrates good compatibility with anionic and cationic surfactants in most cases, enabling synergistic performance in complex formulations—though compatibility testing under actual use conditions is recommended to confirm stability and efficacy.
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