G-25 Glycereth-25 is a nonionic surfactant produced by the precisely controlled polymerization reaction of natural glycerin with ethylene oxide. Its INCI name is Glycereth-25, and its CAS number is 31694-55-0. Its molecular structure contains both polyhydrophilic groups and polyoxyethylene chains, giving it a very high hydrophilic-lipophilic balance. It remains stable over a wide pH range and is resistant to acids, alkalis, and electrolytes, with excellent hard water resistance.
With its outstanding emulsifying and solubilizing capabilities, superior moisturizing and emollient properties, excellent chemical stability, and mild, safe toxicological profile (rat oral LD50 > 5000 mg/kg, classified as practically non-toxic), this product has become a key functional component in formulations across numerous industries. The specific application processes for each industry are detailed below.
G-25 is most widely used in this field, primarily playing three process roles:
In the textile field, G-25 is mainly applied in two process stages: first, as a key component in spinning oils for synthetic fibers, providing excellent antistatic and bundling properties to ensure smooth spinning; second, as a softening agent in fabric finishing processes, imparting a fluffy and smooth hand feel to synthetic fibers and blends, while reducing static electricity generated by fiber friction, thereby improving wearing comfort.
G-25 serves dual functions as an emulsifier and lubricant in water-based metal cutting fluids, grinding fluids, and hydraulic fluids. It forms a stable working emulsion, effectively dispersing processing heat, reducing friction coefficient and wear, improving machining accuracy, and extending tool life. Its excellent hard water resistance ensures long-term stability of the working fluid under poor water quality conditions, preventing demulsification caused by calcium and magnesium ions.
As a low-foaming or controlled-foaming nonionic surfactant, G-25 is suitable for high-pressure spray cleaning and immersion cleaning of hard surfaces such as metal parts, glass, and plastics. Its excellent wetting, penetrating, and solubilizing abilities effectively remove oils and dirt, and it is easily rinsed off without residue. Its low-foaming characteristic makes it particularly suitable for high-pressure spray systems, avoiding foam overflow issues.
In the emulsion polymerization of synthetic resins, coatings, and adhesives, G-25 is used as an emulsifier and stabilizer. It helps uniformly disperse monomers in the aqueous phase and controls the latex particle size distribution, thereby enhancing the storage stability, mechanical stability, and film-forming properties of the final product. This application fully utilizes the electrolyte tolerance advantage brought by its nonionic nature.
G-25 is used as an emulsifier and spreading synergist in water-based pesticide formulations (e.g., emulsifiable concentrates, emulsions in water, suspension concentrates). On one hand, it assists in dissolving poorly soluble technical materials and forming stable emulsions; on the other hand, it significantly enhances the wetting and spreading ability of the spray liquid on plant leaves, increasing coverage area and improving the effective utilization rate and control efficacy of pesticides.
| Parameter | Description |
|---|---|
| Product Name | G-25 Glycereth-25 |
| INCI Name | Glycereth-25 |
| CAS Number | 31694-55-0 |
| Ionic Type | Nonionic Surfactant |
| Chemical Composition | Polyether of glycerin and ethylene oxide (25 EO) |
| Appearance | Colorless to slightly yellow liquid or paste |
| pH Stability Range | Stable over a wide pH range (resistant to acids, alkalis, and electrolytes) |
| Toxicological Classification | Practically non-toxic (LD50 > 5000 mg/kg) |
| Biodegradability | Readily and rapidly biodegradable (OECD 301F, >60% degradation in 28 days) |
| Skin Irritation | Non-irritating (Rabbit, Primary Irritation Index = 0) |
| Eye Irritation | Mildly irritating (reversible within 48 hours) |
Note: Please refer to the product Certificate of Analysis (COA) for specific physicochemical index ranges.