MOA-9P laureth-9 phosphate (CAS number: 39464-66-9) is an anionic phosphate ester surfactant obtained by phosphating laureth-9 (AEO-9). Its molecular formula is C12-14H25-29O(C2H4O)nH (n≈9), with a molecular weight of approximately 650. The product appears as a colorless to light yellow transparent liquid, slightly hygroscopic, readily soluble in water, and possesses the dual characteristics of nonionic and anionic surfactants.
From a chemical composition perspective, this product is a mixture resulting from the phosphation reaction, mainly containing two types of components: monoalkyl phosphate and dialkyl phosphate. Monoalkyl phosphate (monoalkyl phosphate ester) is the primary active component, with a content of ≥80%, providing excellent emulsifying, wetting, and dispersing capabilities. Dialkyl phosphate content is ≤20%, which assists in adjusting the oil solubility and interfacial activity of the product. Additionally, the product contains small amounts of unreacted free phosphoric acid (≤2%) and free laureth-9 (≤3%).
It is worth noting that this product is actually a mixture of fatty alcohol polyoxyethylene ether phosphates with a carbon chain distribution ranging from C12 to C14. Therefore, its CAS registration number 39464-66-9 corresponds to the generic name "Laureth-9 Phosphate," which also reflects the common homolog distribution characteristics of phosphate ester surfactants.
| Parameter Item | Technical Indicator |
|---|---|
| Active Content | ≥95% |
| Monoester Content | ≥80% |
| Diester Content | ≤20% |
| Combined Phosphorus (as P2O5) | 8-12% |
| Free Phosphoric Acid | ≤2% |
| Free Alcohol | ≤3% |
| Solid Content | ≥98% |
| Moisture | ≤0.5% |
| Acid Value | 130~170 mgKOH/g |
| Iodine Value | ≤2 gI₂/100g |
| Hydroxyl Value | ≤5 mgKOH/g |
| Saponification Value | Approximately 230~260 mgKOH/g |
| pH (1% Aqueous Solution) | 1.5~3.0 |
| HLB Value | 11-12 |
| Heavy Metals | ≤10 mg/kg |
| Arsenic | ≤2 mg/kg |
Thanks to its excellent stability against acids, alkalis, and hard water, as well as its outstanding emulsifying, wetting, and dispersing properties, MOA-9P is widely used in the following areas: Personal care products (superfattening agent and emulsifier in high-end shampoos, body washes, and facial cleansers; recommended dosage 0.5%-3%), Textile industry (antistatic agent and softening finishing agent for synthetic fibers), Leather processing (fat-liquoring agent and penetrant), Metalworking fluids (extreme pressure lubricant and anti-rust additive), Pesticide formulations (emulsifying and dispersing agent for emulsifiable concentrates and aqueous emulsions), and Emulsion polymerization (polymerization emulsifier for acrylate and styrene-acrylic systems).