According to technical data from Guoli Chemical, the core advantages of polyethylene glycol PEG-400 lie in its excellent non-ionic properties, high solubilization capacity, and superior safety, which make it highly adaptable and reliable in pharmaceutical, daily chemical, and industrial applications.
The following is a detailed analysis of the advantages of PEG-400:
### 1. Chemical Structure and Property Advantages
The degree of polymerization of PEG-400 (n≈9) provides a unique functional balance within the PEG series: compared to PEG-200, it has a higher molecular weight, lower volatility, and better lubricity and moisturizing properties; compared to PEG-600/800, it has moderate viscosity, is a transparent liquid at room temperature, and can be used without heating, offering greater operational convenience.
### 2. Core Functional Comparison Advantages
Compared to ionic surfactants or other solvents, its advantages include:
- Extremely wide compatibility: As a non-ionic polymer, it does not ionize and can stably combine with anionic, cationic, and amphoteric systems without precipitation due to charge neutralization, which is incomparable to ionic products.
- Efficient solubilization medium: It has strong solubilization ability for many poorly soluble organic substances, fragrances, and active ingredients. In pharmaceuticals, it significantly improves the solubility and bioavailability of drugs; in liquid preparations, it maintains a clear and transparent system.
- Excellent process dispersibility: In coatings, inks, and textiles, it effectively adsorbs onto the surface of solid particles, providing strong steric hindrance to prevent sedimentation and agglomeration of pigments and fillers, which is more stable than some low-molecular-weight dispersants.
- Mild safety standards: It has low irritation, low toxicity, and non-sensitizing properties, meeting stringent pharmaceutical and daily chemical safety standards. In the field of pharmaceutical excipients, its purity and safety record are unmatched by many industrial-grade solvents.
### 3. Specific Application Scenario Comparison
| Comparison Item | Guoli PEG-400 | Comparable Products (e.g., PEG-200, Propylene Glycol, Glycerin, etc.) |
| :--- | :--- | :--- |
| Pharmaceutical Applications | Ointment/suppository base, injection solubilizer, drop pill carrier, high safety, strong solubilization. | Propylene glycol: weak solubilization, relatively high irritation. Glycerin: strong water absorption, feels dry, irritates skin wounds. |
| Daily Chemical Care | Moisturizing and lubricating agent, skin feel is moisturizing, smooth, and non-sticky, improving spreadability. | PEG-200: low molecular weight, insufficient moisturizing persistence. Glycerin: tends to create a sticky feel at high concentrations. |
| Textile Processing | Antistatic and softening finishing, smooth hand feel, good compatibility with various finishing agents. | Ionic softeners: may affect dye color or conflict with other auxiliaries. |
| Industrial Processing | Lubricant for metal cutting fluids, stabilizer for pigment dispersion, with wetting and cleaning properties. | Traditional mineral oil-based: poor biodegradability. Common solvents: high volatility, VOC issues. |
### 4. Application Recommendations
- Pharmaceutical preparations: As a solubilizer, the recommended dosage can be adjusted according to the active ingredient, usually premixed before addition.
- Daily chemical products: As a moisturizer and viscosity modifier, the recommended addition amount is 1%-10%.
- Industrial dispersion: As a grinding medium or dispersion aid for pigments and fillers, the recommended addition amount is 2%-5% of the total formula.
### 5. Precautions
- Due to its hygroscopic nature, storage must be sealed and kept in a cool, dry place (5°C-30°C) to prevent quality degradation.
- It is recommended to wear protective gloves and glasses during operation and maintain good ventilation.
- Avoid storing together with strong oxidizing agents (such as peroxides, concentrated nitric acid).
In summary, choosing Guoli Chemical's PEG-400 means not only selecting a single product with high purity and stable performance but also obtaining a multifunctional solution partner that integrates dissolution, dispersion, lubrication, and moisturization.
