Stearic Acid Polyoxyethylene Ether SG-6 (chemical name: Polyoxyethylene (6) stearate, CAS: 9004-99-3) appears as a white to slightly yellowish waxy solid or flake. The scientific ratio of the hydrophobic stearic acid chain to the hydrophilic polyoxyethylene chain in its molecular structure gives it balanced hydrophilic-lipophilic properties (moderate HLB value), enabling it to form a stable adsorption layer at the oil-water interface, thereby exerting excellent surface activity.
The core advantage of this product lies in its "four-in-one" combination: excellent emulsifying power, with an extremely low critical micelle concentration, efficiently emulsifying animal and vegetable oils and mineral oils to form a stable and fine emulsion system; strong wetting ability, rapidly reducing the dynamic surface tension of working solutions, imparting outstanding instantaneous wetting and spreading effects on textile fibers and hard surfaces; high tolerance to chemical environments, maintaining stable nonionic activity in acidic, alkaline media and hard water conditions without saponification or hydrolysis; broad formulation compatibility, capable of synergistic compounding with anionic, cationic, and amphoteric surfactants without antagonism, significantly expanding the freedom of formulation design.
In terms of safety and environmental protection, this product is of low toxicity (rat oral LD50 > 2000 mg/kg), non-irritating to skin (PII < 0.5), non-sensitizing, and readily biodegradable (OECD 301B, 28-day degradation rate > 60%), with low impact on the aquatic environment, aligning with the development trend of green chemistry.
| Characteristic Dimension | Specific Performance |
|---|---|
| Emulsifying Power | Extremely low critical micelle concentration; efficiently emulsifies animal/vegetable oils and mineral oils; system is stable and fine |
| Wetability | Rapidly reduces dynamic surface tension; instantaneous wetting and spreading; shortens processing time |
| Chemical Stability | Resistant to acids, alkalis, and hard water; no saponification or hydrolysis; ensures process consistency |
| Formulation Compatibility | Can be compounded with anionic, cationic, and amphoteric surfactants for synergistic enhancement |
| Physical Form | White to slightly yellowish waxy solid or flake, convenient for storage and feeding |
| Solubility | Dispersible or soluble in water; soluble in ethanol and other organic solvents |
| Safety | Low toxicity, non-irritating to skin, non-sensitizing, readily biodegradable |
| Flash Point | > 150°C (closed cup), non-flammable |
With the above characteristics, SG-6 is widely used as a multifunctional additive in multiple industries: