The chemical nature of low-foam penetrant SF (CAS number: 26468-86-0) is fatty alcohol polyoxyethylene ether phosphate, with a molecular weight of approximately 676 (calculated as monoester). It appears as a colorless to light yellow transparent liquid. This product belongs to nonionic surfactants, but due to the introduction of phosphate ester groups in its molecular structure, it actually exhibits some anionic characteristics. Its HLB value is between 11 and 13, providing a balanced hydrophilic-lipophilic property, capable of effectively reducing the surface tension of an aqueous solution to about 30 mN/m (0.1% aqueous solution, 25°C). The critical micelle concentration is approximately 150 mg/L, demonstrating excellent wetting and spreading ability.
The core physicochemical characteristic of this product lies in its excellent low-foaming property and rapid penetrating power. According to the data from GUOLI Chemical, the penetration time measured by the canvas sedimentation method for a 1% aqueous solution at 25°C does not exceed 10 seconds, with extremely low foam generation and unstable foam, making it highly suitable for dynamic circulation cleaning or high-pressure spraying systems. At the same time, the product exhibits excellent chemical stability, resisting acids, alkalis, and hard water, especially tolerating NaOH strong alkali solutions at concentrations up to 300 g/L, which is at the top level among similar surfactants, making it an ideal choice for high-concentration alkali processes such as mercerizing.
The product has an active content ≥ 99%, moisture content ≤ 1.0%, density of 1.05~1.10 g/cm³ (25°C), dynamic viscosity of 200~400 mm²/s (25°C), flash point > 150°C, pour point < 0°C, and is a non-flammable liquid with high safety for storage and transportation. The monoester content in the molecule is ≥ 60%, diester content ≤ 40%, free phosphoric acid ≤ 1.0%, free alcohol ≤ 3%, combined phosphorus content (calculated as P₂O₅) is 8~10%, total heavy metals ≤ 20 mg/kg, arsenic ≤ 2 mg/kg, meeting the quality requirements for industrial applications.
| Parameter Category | Parameter Name | Technical Indicator | Remarks |
|---|---|---|---|
| Basic Information | Chemical Name | Fatty alcohol polyoxyethylene ether phosphate | Monoester + diester mixture |
| CAS Number | 26468-86-0 | — | |
| Appearance | Colorless to light yellow transparent liquid | — | |
| Molecular Properties | Molecular Weight | Approximately 676 | Calculated as monoester |
| Ion Type | Nonionic (with anionic characteristics) | — | |
| Physical Properties | Density (25°C) | 1.05~1.10 g/cm³ | — |
| Dynamic Viscosity (25°C) | 200~400 mm²/s | — | |
| Low Shear Viscosity (25°C) | 300~500 mPa·s | — | |
| Refractive Index (25°C) | 1.450~1.460 | — | |
| Melting Point / Pour Point | < 0°C | Liquid at room temperature | |
| Flash Point | > 150°C | Non-flammable liquid | |
| Hygroscopicity | Slightly hygroscopic | — | |
| Solubility | Easily soluble in water | — | |
| Cloud Point (1% Aqueous Solution) | ≥ 100°C | — | |
| Surface Activity Parameters | HLB Value | 11~13 | — |
| Surface Tension (0.1% Aqueous Solution, 25°C) | About 30 mN/m | — | |
| Critical Micelle Concentration (CMC) | About 150 mg/L | — | |
| Penetrating Power (1% Aqueous Solution, 25°C, Canvas Sedimentation Method) | ≤ 10 seconds | Core performance | |
| Foaming Characteristic | Low foam, few and unstable bubbles | Core performance | |
| Alkali Resistance | Resistant to 300 g/L NaOH solution | Excellent | |
| Chemical Stability | Resistant to acids, alkalis, and hard water | — | |
| pH Value | 1% Aqueous Solution | 5.0~7.0 | — |
| 5% Aqueous Solution | 6.0~8.0 | — | |
| Active Ingredient Content | ≥ 99% | — | |
| Chemical Indicators | Acid Value | 80~120 mgKOH/g | — |
| Saponification Value | 120~150 mgKOH/g | — | |
| Hydroxyl Value | ≤ 10 mgKOH/g | — | |
| Iodine Value | ≤ 1 | — | |
| Amine Value | ≤ 1 mgKOH/g | — | |
| Moisture Content | ≤ 1.0% | — | |
| Monoester Content | ≥ 60% | — | |
| Diester Content | ≤ 40% | — | |
| Free Phosphoric Acid | ≤ 1.0% | — | |
| Free Alcohol | ≤ 3% | — | |
| Combined Phosphorus (calculated as P₂O₅) | 8~10% | — | |
| Safety and Limit Indicators | Unsaturation | ≤ 0.1 mmol/g | — |
| Tertiary Amine Content | ≤ 0.5% | — | |
| Total Heavy Metals | ≤ 20 mg/kg | — | |
| Packaging Specifications | 50 kg/200 kg plastic drums, IBC tote tank | — |
Based on the above physicochemical parameters, low-foam penetrant SF is particularly suitable for the following scenarios: ① In the textile industry for desizing, scouring, mercerizing, and dyeing pretreatment processes, its resistance to 300 g/L strong alkali and rapid penetrating power of ≤ 10 seconds can greatly enhance processing efficiency and leveling; ② In industrial high-pressure spray cleaning and CIP inline cleaning, the low-foam characteristic effectively avoids foaming overflow issues; ③ In pesticide formulations as a wetting and penetrating synergist, utilizing its low surface tension and low CMC value to enhance the spreading ability of the liquid on plant leaves. It is recommended to use a conventional concentration range of 0.1%~1%, with specific dosages optimized through gradient experiments based on process conditions and penetration requirements.