Isomeric Alcohol Polyether E-1303 (CAS: 9043-30-5) is a nonionic surfactant produced by Guoli Chemical through ethoxylation (average 3 moles of EO) of isomeric tridecyl alcohol. Its molecular formula is C13H27O(C2H4O)nH (n≈3), with a molecular weight of approximately 332. The product appears as a colorless to light yellow liquid, with an active content ≥99% and free alcohol content ≤1%, making it a high-purity product.
Due to its isomeric branched hydrophobic structure, this product exhibits outstanding interfacial activity. Its HLB value is approximately 8, surface tension is as low as 25-30 mN/m, critical micelle concentration (CMC) ranges from 0.1 to 0.5 g/L, cloud point is 30-45°C, and hydroxyl value is between 165 and 175 mgKOH/g. The product has good chemical stability at room temperature, can withstand a wide range of acidic, alkaline, and hard water environments, and is classified as a low-foaming surfactant. Its penetrating power (0.1% aqueous solution, standard canvas method) is 5-10 seconds.
From a toxicological and environmental perspective, this product has an acute oral toxicity LD50 > 2000 mg/kg (low toxicity), mild skin irritation, moderate eye irritation, and no skin sensitization. Ecotoxicity: fish LC50, algae EC50, and daphnia EC50 are all > 100 mg/L, and it is readily biodegradable (OECD 301 method, ≥60% BOD/COD), making it an environmentally compatible product.
| Parameter Name | Technical Indicator |
|---|---|
| Product Name | Isomeric Alcohol Polyether E-1303 (Isotridecanol Polyoxyethylene (3) Ether) |
| CAS Number | 9043-30-5 |
| Molecular Formula | C13H27O(C2H4O)nH, n≈3 |
| Molecular Weight | Approximately 332 |
| Appearance | Colorless to Light Yellow |
| Ionic Type | Nonionic |
| HLB Value | 8 |
| Cloud Point (°C) | 30-45 |
| Active Content (%) | ≥99 |
| pH Value (1% Aqueous Solution) | 5.0-7.0 |
| Iodine Value (gI₂/100g) | ≤1 |
| Water Solubility | Dispersible in Water |
| Surface Tension (mN/m) | 25-30 |
| Critical Micelle Concentration CMC (g/L) | 0.1-0.5 |
| Acid Value (mgKOH/g) | ≤0.5 |
| Saponification Value (mgKOH/g) | ≤1 |
| Hydroxyl Value (mgKOH/g) | 165-175 |
| Moisture Content (%) | ≤0.5 |
| Density (g/cm³) | 0.92-0.95 |
| Kinematic Viscosity (mm²/s) | 60-120 |
| Refractive Index | 1.450-1.455 |
| Flash Point (°C) | >150 |
| Melting Point (°C) | <-10 |
| Penetrating Power (seconds) | 5-10 (0.1% Aqueous Solution, Standard Canvas Method) |
| Foam Characteristics | Low Foaming |
| Free Alcohol (%) | ≤1 |
| Chemical Stability | Stable at Room Temperature |
| Alkali Resistance | Resistant to Acids and Alkalis |
| Heavy Metals (ppm) | ≤20 |
| Arsenic (ppm) | ≤3 |
| Packaging Specifications | 50kg Plastic Drum / 200kg Plastic Drum / IBC Tote |
Based on its HLB value of about 8, Isomeric Alcohol Polyether E-1303 is particularly suitable for use as a W/O emulsifier and wetting/penetrating agent. In industrial metal cleaning and hard surface cleaning formulations, a recommended dosage is 4%-15%; in textile printing and dyeing as a scouring penetrant, a concentration of 0.5-3 g/L in working solution is suggested; in pesticide emulsifiable concentrate formulations, it works best when paired with surfactants of higher HLB values, with a recommended amount of 5%-12% of the total formula. Since the product disperses in water to form an emulsion and has a low cloud point (30-45°C), its suitability should be carefully evaluated in formulations requiring a completely transparent aqueous solution.