The rapid penetrant T-70E (wetting agent OT) has the chemical name sodium di(2-ethylhexyl) sulfosuccinate (CAS No.: 577-11-7), also known as dioctyl sodium sulfosuccinate, sodium diisooctyl sulfosuccinate, docusate sodium, Aerosol OT, etc. The product appears as a colorless to pale yellow transparent viscous liquid. It is a classic anionic surfactant with good solubility and compatibility in water, and can be used in combination with various surfactants and auxiliaries.
The core value of this product lies in its "rapid" characteristic—it can extremely quickly reduce the surface tension of liquids, allowing the working solution to wet and penetrate into the substrate within a very short time. This property is particularly key in processes requiring fast and uniform wetting, such as textile pretreatment, paper coating, and pesticide spraying. At the same time, its emulsifying and dispersing functions can effectively stabilize the emulsion system, preventing oil-water separation and particle aggregation, playing a dual role in emulsion polymerization and coating preparation.
Another prominent advantage is its excellent hard water resistance. Many surfactants tend to combine with calcium and magnesium ions in hard water conditions, causing precipitation and deactivation. However, the rapid penetrant T-70E can maintain stable performance in hard water environments, adapting to various water quality conditions, which is especially important in areas with high water hardness.
In textile printing and dyeing, it is used in pretreatment processes such as desizing, scouring, bleaching, and finishing to promote uniform penetration of dyes and chemicals, improving dye uptake and color fastness. In pesticide formulations, it serves as a wetting and penetrating synergistic component, enhancing the spreading and absorption of the pesticide solution on plant leaf surfaces, improving efficacy and rainfastness. In emulsion polymerization, it participates as a co-emulsifier in the polymerization reaction, improving emulsion particle size uniformity and storage stability. In coatings and inks, it accelerates pigment wetting and dispersion, reduces surface defects, and enhances coating adhesion and gloss. In metal cleaning and household cleaning agents, it enhances the penetration and removal of oil stains, improving degreasing efficiency and cleaning speed.
This product is an anionic surfactant. When combined with cationic auxiliaries, precipitation may occur, so compatibility tests should be conducted. Protective gloves and goggles should be worn during operation to avoid direct contact with skin and eyes. For specific safety information, please refer to the product SDS.