Laureth-3 Phosphate MOA-3P is a core product in the Guoli Chemical alcohol ether phosphate series, and its most notable feature is the precise design with 3 EO addition numbers. Compared to similar products with high EO addition numbers (e.g., MOA-9P, EO≈9), MOA-3P has stronger lipophilicity and a lower HLB value (6.5), which gives it an irreplaceable emulsifying ability in water-in-oil (W\/O) emulsion systems—especially suitable for scenarios where the oil phase is the continuous phase, such as metalworking fluids and pesticide emulsifiable concentrates. Within the Guoli Chemical product series, MOA-9P, with longer EO chains and a higher HLB value, is more suitable for oil-in-water (O\/W) systems; MOA-3P excels in industrial hard surface cleaning and textile pretreatment processes that require rapid penetration and strong degreasing.
From the molecular structure perspective, MOA-3P has a monoester content of ≥55%, diester content of ≤35%, and free phosphoric acid controlled below 2.0%. Compared to iso-alcohol ether phosphate series (e.g., E-1306P\/E-1310P, which use iso-tridecanol structures), MOA-3P adopts a linear lauryl alcohol (C12-14) backbone, giving it more regular molecular arrangement and superior biodegradability, while exhibiting lower irritation to skin and mucous membranes in personal care formulations. Compared to potassium salt derivatives (MOA3PK-40\/70), MOA-3P is provided in acidic form with an acid value of 150~180 mg KOH\/g, allowing formulators to choose different bases (e.g., KOH, TEA, AMP) for neutralization as needed, thus offering greater formulation design flexibility—it can be used directly in acidic cleaning formulas or neutralized and used as a mild anionic surfactant in personal care systems such as facial cleansers and body washes.
In terms of extreme condition tolerance, MOA-3P exhibits excellent electrolyte resistance and hard water tolerance, maintaining effective cleaning and emulsifying performance in hard water with high calcium and magnesium ion content without forming lime soap deposits. Combined with its high active content of ≥95% and low critical micelle concentration (CMC) of approximately 150 mg\/L, MOA-3P achieves outstanding interfacial activity at low dosages, effectively reducing overall formulation costs.
| Parameter | Laureth-3 Phosphate MOA-3P | Comparison with Similar Products |
|---|---|---|
| EO Addition Number (n) | ≈3 | MOA-9P is ≈9; E-1306P is ≈6; E-1310P is ≈10 |
| HLB Value | 6.5 | Moderately low, suitable for W\/O emulsification and penetration; high EO products have higher HLB and are more hydrophilic |
| Active Content | ≥95% | High activity, superior to some low-concentration phosphate ester products on the market |
| Monoester Content | ≥55% | High monoester content means better emulsification performance; diester ≤35% |
| Acid Value (mg KOH\/g) | 150~180 | Acidic form, can be flexibly neutralized; potassium salt products (MOA3PK series) are pre-neutralized |
| pH (1% Aqueous Solution, 25°C) | 1.5~3.0 | Acidic, suitable for acidic cleaning formulas or use after neutralization |
| Surface Tension (1% Aqueous Solution, 25°C) | Approx. 30 mN\/m | Low surface tension, strong wetting and spreading ability |
| Critical Micelle Concentration (CMC) | Approx. 150 mg\/L | Low CMC, achieving good results at low dosage |
| Penetration Power (Canvas Sinking Method) | <10s | Excellent penetration speed, low EO addition number imparts stronger penetration ability |
| Foaming Properties | Rich | Dual functionality of emulsification and foaming |
| Alkali\/Electrolyte Resistance | Good | Maintains stable surface activity in acidic, alkaline, and high-salt solutions |
| Free Phosphoric Acid | ≤2.0% | Low free phosphoric acid content, reducing interference with formulation |
| Density (25°C) | Approx. 1.06 g\/cm³ | — |
| Kinematic Viscosity (25°C) | Approx. 250 mm²\/s | — |
Metalworking Fluids: