MOA-9P Laureth-9 Phosphate (CAS: 39464-66-9) is an anionic surfactant obtained by phosphating modification of laureth-9. It appears as a colorless to light yellow transparent liquid. Its unique molecular structure contains both polyoxyethylene ether chains (nonionic hydrophilic groups) and phosphate ester groups (anionic hydrophilic groups), giving it excellent compatibility and functional synergy in formulation systems — it retains the good emulsifying ability of nonionic surfactants while also possessing the outstanding wetting and penetrating properties of anionic surfactants.
In terms of performance, MOA-9P has five notable characteristics: First, excellent emulsifying performance, capable of efficiently stabilizing oil-water interfaces, suitable for preparing fine and stable emulsion systems; second, outstanding wetting and dispersing ability, significantly reducing interfacial tension and promoting uniform distribution of active ingredients; third, excellent resistance to acids, alkalis, and hard water, maintaining stable performance under wide pH ranges and high-hardness water conditions without deactivation or precipitation; fourth, good foaming and foam-stabilizing properties, giving the final product a fine and rich foam texture; fifth, extreme-pressure lubrication and anti-rust functions, providing effective boundary lubrication protection in metalworking systems while also exhibiting anti-rust and corrosion-inhibiting effects.
From an environmental and safety perspective, MOA-9P has low acute toxicity (rat oral LD₅₀ > 2000 mg/kg), is readily biodegradable (28-day degradation rate > 80%), has low toxicity to aquatic organisms (zebrafish 96-hour LC₅₀ > 100 mg/L), and has no bioaccumulation potential, making it an environmentally friendly surfactant. However, attention should be paid to its moderate skin irritation and severe eye damage, so appropriate protective measures should be taken during handling.
| Parameter Item | Range/Value |
|---|---|
| Appearance | Colorless to light yellow transparent liquid |
| Ionic Type | Anionic |
| Active Content | ≥95% |
| HLB Value | 11～12 |
| pH Value (1%/5% aqueous solution) | 1.5～3.0 |
| Acid Value | 130～170 mg KOH/g |
| Saponification Value | Approx. 230～260 mg KOH/g |
| Iodine Value | ≤2 g I₂/100g |
| Moisture Content | ≤0.5% |
| Density (25°C) | Approx. 1.05 g/cm³ |
| Kinematic Viscosity (25°C) | Approx. 100～200 mm²/s |
| Surface Tension (1% aqueous solution, 25°C) | Approx. 30～35 mN/m |
| Critical Micelle Concentration (CMC) | Approx. 0.01～0.1 g/L |
| Monoester Content | ≥80% |
| Combined Phosphorus (as P₂O₅) | 8～12% |
| Freezing Point | < 0°C |
| Flash Point | > 150°C |
| Penetrating Power | Excellent |
| Foam Characteristics | Medium foam, good stability |
| Solubility | Easily soluble in water |
Due to its multifunctional properties, MOA-9P has wide application value in six major industries:
This product is an acidic phosphate ester (pH 1.5～3.0) and is moderately irritating to the skin (rabbit skin irritation index PII 2.0～4.0) and can cause severe damage to the eyes. During operation, chemically resistant gloves, protective goggles, and protective clothing must be worn. In terms of chemical stability, it is not resistant to strong alkalis; the phosphate ester bond is susceptible to hydrolysis under strongly alkaline conditions. Direct compounding with strongly alkaline substances should be avoided in formulations. For more safety and emergency treatment information, please refer to the Safety Data Sheet (SDS).