According to technical data from Guoli Chemical, the core advantages of G-18 glycerol polyoxyethylene ether (polyoxyethyl glycerol ether) over similar products (e.g., G-25) lie in its extremely high hydrophilicity, superior solubilization ability, and better chemical stability in specific systems.
Although they belong to the same series of glycerol polyoxyethylene ether nonionic surfactants, due to differences in molecular structure (degree of polymerization of ethylene oxide n), their performance focuses and application scenarios differ significantly. Below is a detailed comparative analysis based on the Guoli Chemical database.
### 1. Core Performance Advantage Comparison
| Comparison Item | G-18 (n≈18) Advantage | G-25 (n≈25) Characteristic | Advantage Interpretation |
| :--- | :--- | :--- | :--- |
| HLB Value | 18 | 13.5 | G-18 has a higher HLB value, stronger hydrophilicity, dissolves more rapidly in water, and is more suitable as a solubilizer and emulsifier for O/W systems. |
| Solubilization Ability | Stronger | Relatively strong | For fragrances, oils, or active ingredients that are difficult to dissolve in water, G-18 can form clearer and more stable microemulsion systems, which is its outstanding advantage. |
| Foam Characteristics | Rich foam | Low foam | G-18 has an advantage in products requiring rich foam, such as facial cleansers and body washes, enhancing the skin feel during use. |
| Surface Tension | 35~40 mN/m | About 32 mN/m | G-25 is more efficient in reducing surface tension, but in personal care products requiring rich foam, such as facial cleansers and body washes, G-18 offers better overall wetting and foam performance. |
| Cloud Point (1% aqueous solution) | >100°C | >100°C | Both have excellent high-temperature stability and electrolyte resistance, remaining effective in high-temperature or acidic/alkaline cleaning formulations. |
| Chemical Stability | Stable within pH 3~12 | Stable at room temperature | The database specifically emphasizes G-18's stability over a wide pH range, which is a major advantage for formulating strong acidic or alkaline industrial cleaners. |
| Moisturizing & Mildness | Also provides moisturizing properties | Mild, low irritation | Based on its glycerol ether structure, G-18 offers additional moisturizing effects in cleansing products, reducing post-wash tightness and improving skin feel. |
| Molecular Weight & Viscosity | 800~900, moderate viscosity | ~1200, higher viscosity | G-18 has a lower molecular weight, making it easier to handle in formulations with better fluidity. |
### 2. Summary of Application Advantages
According to Guoli Chemical's application data, G-18's advantages are particularly prominent in the following areas:
- Personal Care Products: With its high HLB value, rich foam, and specific moisturizing properties, it is an ideal choice for facial cleansers, body washes, and fragrance solubilizers, achieving a "cleansing and care in one" effect.
- Industrial Cleaners: In scenarios requiring resistance to strong acids/bases and good foam to carry dirt, such as hard surface cleaning, textile pretreatment, its chemical stability and detergency advantages are clear.
- Polyurethane Foam: As a foam stabilizer, G-18 effectively regulates cell structure, a unique application not mentioned in the G-25 product database.
### 3. Selection Recommendations
Choosing G-18 over G-25 depends mainly on your formulation goals:
- Choose G-18 if you need:
- To solubilize poorly soluble ingredients and prepare clear aqueous systems.
- To formulate high-pH industrial cleaners.
- To develop foam-rich facial cleansers or body washes with moisturizing effects.
- For regulating foam structure in the polyurethane foaming industry.
- Choose G-25 if you need:
- Low-foaming or even non-foaming industrial cleaning or metalworking systems.
- Lower surface tension for rapid wetting and spreading.
- As an emulsifying stabilizer in emulsion polymerization to control latex particle size.
Precautions: According to GHS classification, G-18 causes skin irritation (H315) and serious eye irritation (H319). Protective gloves and goggles must be worn during handling; avoid direct contact. Although G-18 formulations are mild, its direct role in the final product is as a functional ingredient, and safe handling practices should still be followed during formulation.
