Quick Penetrant Fast T-40 (also known as Quick Penetrant T, Penetrant T, Wetting Agent OT, Aerosol OT, AOT), with the full chemical name of sodium di(2-ethylhexyl) sulfosuccinate, molecular formula C₂₀H₃₇NaO₇S, and molecular weight 444.56. The product appears as a colorless to light yellow transparent viscous liquid, belonging to the anionic surfactant type, produced by Hai'an Guoli Chemical Co., Ltd. The core feature of this product is its extremely fast penetration ability, with a penetration time of ≤5 seconds measured by the standard canvas sedimentation method, significantly superior to conventional penetrants.
The HLB value of Fast T-40 is 12.4, combining excellent wetting, spreading, emulsifying, and dispersing capabilities. The surface tension of its 1% aqueous solution can be reduced to ≤30 mN\/m, with a critical micelle concentration (CMC) of approximately 0.1~0.4 g\/L, indicating that significant effects can be achieved at very low dosage. The product is easily soluble in water and exhibits excellent chemical stability - it remains active in acid, alkali, and hard water systems without easy precipitation or failure. Additionally, Fast T-40 produces low foam during use, making it suitable for industrial continuous operations.
| Parameter Item | Technical Index |
|---|---|
| Chemical Name | Sodium di(2-ethylhexyl) sulfosuccinate |
| CAS Number | 577-11-7 |
| Molecular Formula | C₂₀H₃₇NaO₇S |
| Molecular Weight | 444.56 |
| Ionic Type | Anionic Surfactant |
| Appearance | Colorless to light yellow transparent viscous liquid |
| Effective Content (Solid Content) | ≥40% |
| pH Value (1% Aqueous Solution) | 5.0~7.0 |
| HLB Value | 12.4 |
| Penetration Power (Standard Canvas Sedimentation Method) | ≤5 seconds |
| Surface Tension (1% Aqueous Solution) | ≤30 mN\/m |
| Critical Micelle Concentration (CMC) | ~0.1~0.4 g\/L |
| Density | 1.03~1.08 g\/cm³ |
| Saponification Value | 252 mg KOH\/g |
| Refractive Index | 1.415~1.420 |
| Water Solubility | Easily soluble in water |
| Foam Characteristics | Low foam |
| Chemical Stability | Resistant to acid, alkali, and hard water |
| Free Alcohol | ≤1% |
| Packaging Specifications | 50kg plastic drum \/ 200kg plastic drum \/ IBC tote |
1. Textile Printing and Dyeing - High-efficiency Wetting Penetrant
In textile pretreatment, dyeing, and finishing processes, Fast T-40 can quickly reduce the surface tension of dye liquors and treatment liquids, promoting deep penetration of dyes and auxiliaries into the fiber interior, significantly improving dye uptake and leveling, especially suitable for rapid processing of high-density fabrics. Its low foam characteristics facilitate continuous operation and reduce the amount of defoamer needed.
2. Pesticide Formulations - Wetting and Spreading Auxiliary
In wettable powders (WP), water-dispersible granules (WDG), suspension concentrates (SC), and aqueous solutions (AS), Fast T-40 significantly enhances the wetting and spreading ability of the spray liquid on plant leaf surfaces and target organism surfaces, reducing liquid roll-off and loss, and improving the effective utilization rate of pesticides and field control effects.
3. Daily Chemical and Industrial Cleaning - Penetrating and Emulsifying Component
Used in general and heavy-duty cleaning formulations, its powerful penetrating ability deeply removes stubborn oil, grease, and carbon deposits from fabric surfaces and industrial component crevices, maintaining excellent cleaning efficiency even at room temperature and low temperature conditions.
4. Paper Industry - Sizing and Coating Penetration Aid
During sizing and coating processes, it promotes the uniform penetration and distribution of sizing agents and coatings into paper fibers, enhancing the surface strength, smoothness, and printability of paper, effectively reducing linting and dusting.
5. Leather Industry - Soaking, Degreasing, and Finishing Penetrant
It accelerates the penetration of water and chemicals into the leather fiber interior, shortens soaking and rehydration time, improves degreasing efficiency and adhesion strength of finishing layers, and enhances the softness and uniformity of leather.
The recommended dosage is usually 0.1% to 2.0% of the total working solution (specific dosage should be determined by experiments based on actual process requirements and substrate characteristics). The product can be directly added to the aqueous phase with stirring for dissolution, or used in combination with other surfactants. Due to its good compatibility with anionic, nonionic, and most cationic systems, the formulation design has high flexibility.