High-content fast penetrant T-75A (CAS No.: 577-11-7) has the chemical name dioctyl sodium sulfosuccinate, molecular formula C20H37NaO7S, and molecular weight 444.56. The product appears as a light yellow transparent liquid, easily soluble in water, and belongs to the high-efficiency anionic surfactant category. Its most outstanding performance is extremely fast penetration ability—at 0.1% aqueous solution and 25°C, using the canvas sedimentation method, the penetration time is only ≤5 seconds. It is an ideal auxiliary agent for achieving rapid wetting and deep penetration in industries such as textiles, pesticides, and daily chemicals.
This product has excellent chemical stability, remaining active and stable within the pH range of 4~10, and is resistant to hard water and electrolytes. In terms of foam performance, it exhibits low foaming characteristics, with foam height less than 50mm (Ross method), making it suitable for processes requiring rapid defoaming or continuous production. Additionally, the product has high purity, with diester content ≥98%, monoester content controlled below 2%, free alcohol ≤1%, and stable batch-to-batch quality.
In terms of safety, according to the safety data sheet of the chemical database of Guoli Chemical, this product has GHS classifications of Skin corrosion/irritation Category 2 and Serious eye damage/eye irritation Category 2. Protective gloves and goggles must be worn during operation. The flash point is greater than 100°C, and it is not classified as a flammable liquid, but it should still be stored away from heat sources and open flames.
| Parameter Item | Technical Index |
|---|---|
| Product Name | High-content fast penetrant T-75A |
| Chemical Name | Dioctyl sodium sulfosuccinate (DOSS) |
| CAS No. | 577-11-7 |
| Molecular Formula | C20H37NaO7S |
| Molecular Weight | 444.56 |
| Ionic Type | Anionic |
| Appearance (25°C) | Light yellow transparent liquid |
| Solid Content | ≥75% |
| Active Matter Content | ≥75% |
| Water Content | ≤25% |
| Density (25°C) | 1.05~1.10 g/cm³ |
| Kinematic Viscosity (25°C) | Approx. 150~200 mm²/s |
| Low Shear Viscosity (25°C) | Approx. 160~220 mPa·s |
| Refractive Index (20°C) | 1.460~1.470 |
| pH Value (1% Aqueous Solution) | 5.0~7.0 |
| pH Value (5% Aqueous Solution) | 5.0~7.5 |
| HLB Value | Approx. 13.5 |
| Cloud Point | None (anionic type) |
| Surface Tension (0.1%, 25°C) | 26.0~29.0 mN/m |
| Critical Micelle Concentration CMC (25°C) | 0.60~0.70 g/L |
| Penetration (0.1%, 25°C, Canvas Sedimentation Method) | ≤5 seconds |
| Foam Performance (Ross Method) | Low foam, foam height < 50mm |
| Acid Value | ≤2 mg KOH/g |
| Saponification Value (Based on 100% Active Matter) | Approx. 250 mg KOH/g |
| Iodine Value | < 1 g I₂/100g |
| Diester Content | ≥98% |
| Monoester Content | < 2% |
| Free Alcohol | ≤1% |
| Melting Point | < -10°C (liquid at room temperature) |
| Flash Point | > 100°C |
| Solubility | Easily soluble in water |
| Chemical Stability | Stable within pH 4~10; strong acids and bases may cause hydrolysis |
| Hygroscopicity | Slightly hygroscopic, stable in humid environments |
| Heavy Metal Content | ≤10 mg/kg |
| Arsenic Content | ≤3 mg/kg |
| Phosphorus Content | None (phosphorus-free) |
| Packaging Specifications | 50KG plastic drum, 200KG plastic drum, IBC tote |
Combining its HLB value of approximately 13.5, extremely strong penetration (≤5 seconds), and low foaming characteristics, this product is particularly suitable for process scenarios requiring rapid wetting and penetration: