Isotridecyl phosphate ester E-1306P (CAS: 9043-30-5) is an anionic surfactant produced by phosphation of isotridecyl polyoxyethylene ether (n≈6). It appears as a pale yellow transparent viscous liquid with an active content ≥95% and is easily soluble in water. It combines the extreme pressure lubricity of phosphate ester groups with the penetrating and wetting properties of EO chains, making it a multifunctional additive.
According to the Guoli Chemical product database, the HLB value of this product is between 7.0 and 9.0, classifying it as a lipophilic-hydrophilic balanced surfactant. It can serve both as a co-emulsifier in O/W emulsification systems and as a lubrication and corrosion inhibition component in concentrates. The pH of a 1% aqueous solution is 5.0~7.0 (near neutral), but at 5% concentration, the pH drops to 2.0~4.0 (acidic). Therefore, attention must be paid to the acid-base compatibility of the system when preparing high-concentration premixes.
In terms of usage, E-1306P can be directly added to the formulation via cold blending or warm mixing (recommended operating temperature not exceeding 40°C), or it can be pre-diluted with deionized water to 10%~20% concentration before addition to facilitate uniform dispersion. It is recommended to add slowly under stirring to avoid local high concentration leading to gelation or precipitation.
| Parameter | Value |
|---|---|
| Ionic type | Anionic |
| Appearance (25°C) | Pale yellow transparent viscous liquid |
| Active content | ≥95% |
| HLB value | 7.0~9.0 |
| pH of 1% aqu. solution | 5.0~7.0 |
| pH of 5% aqu. solution | 2.0~4.0 |
| Density (25°C) | 1.05~1.10 g/cm³ |
| Kinematic viscosity (25°C) | 200~500 mPa·s |
| Surface tension (1‰ aqu. solution) | 35~40 mN/m |
| Free phosphoric acid | ≤0.5% |
| Monoester content | 50%~70% |
| Diester content | 25%~40% |
| Water solubility | Easily soluble in water |
| Foam characteristics | Low foam |
| Alkali resistance | Good |
| Flash point | >100°C |
The following are empirical reference dosage ranges for various application fields (Source: Guoli Chemical database product data does not provide specific dosage; the following are industry general recommendations. Actual dosage must be verified through formulation experiments):
| Application Field | Functional Role | Recommended Dosage (% of total formulation) |
|---|---|---|
| Metalworking fluids (emulsifiable oils/semi-synthetics/full synthetics) | Extreme pressure lubricant, corrosion inhibitor | 2%~8% |
| Industrial alkaline cleaners | Alkali-resistant penetrant, degreaser | 3%~10% |
| Textile pretreatment (scouring agents/penetrants) | Penetration promotion, impurity removal | 1%~5% |
| Leather degreasing and fatliquoring | Emulsifying degreasing, softening aid | 2%~6% |
| Pesticide emulsifiable concentrates/emulsions in water | Emulsifying dispersant | 5%~15% (proportion in total emulsifier amount) |
| Electroplating bath enhancement | Wetting dispersion, auxiliary brightening | 0.1%~1% |
Blending key points: