Polyethylene glycol PEG-300 (CAS No.: 25322-68-3) is a colorless to slightly yellow transparent viscous liquid produced by Guoli Chemical, belonging to the nonionic surfactant category. Its molecular weight ranges from 285 to 315, with an average degree of polymerization n≈6. The biggest highlight of this product is its miscibility with various solvents such as water, ethanol, and acetone in any proportion, along with excellent chemical stability that can withstand acidic, alkaline, and hard water environments, making it an ideal choice in many industrial scenarios requiring stable formulations.
In terms of performance, PEG-300 demonstrates strong functionality. Firstly, it has excellent emulsifying, wetting, dispersing, and solubilizing capabilities, significantly enhancing the uniformity and stability of formulations. Secondly, the product has extremely low volatility, which endows it with long-lasting moisturizing and lubricating effects, especially suitable for applications requiring sustained moisture or reduced friction. Additionally, its safety and environmental properties are outstanding, with an acute oral toxicity LD50 greater than 20 g/kg (practically non-toxic), non-irritating to skin, non-sensitizing, rapidly biodegradable, and environmentally friendly to aquatic life.
With these characteristics, PEG-300 has an extremely wide range of applications, covering almost multiple fields from high-tech manufacturing to daily consumer goods. In the pharmaceutical industry, it is used as an ointment base, suppository carrier, and even injection solvent; in the daily chemical industry, it serves as an efficient moisturizing and lubricating ingredient in creams, shampoos, and toothpaste; while in the agricultural sector, it acts as an emulsifier and spreading agent for pesticides, enhancing the spreading ability of the liquid on plant surfaces and improving application efficacy.
| Parameter Category | Parameter Item | Value/Description |
|---|---|---|
| Basic Physical Properties | Appearance | Colorless to slightly yellow transparent liquid |
| Ionic Type | Nonionic | |
| Active Content | ≥99% | |
| Density | 1.11~1.13 g/cm³ | |
| Kinematic Viscosity | 60~75 mm²/s | |
| Physicochemical Parameters | Freezing Point | -15~-8°C |
| Flash Point (Closed Cup) | >200°C | |
| HLB Value | 16.5 | |
| Surface Tension | Approx. 44.5 mN/m | |
| Chemical Indicators | Hydroxyl Value | 356 - 394 mgKOH/g |
| Acid Value | ≤0.2 mgKOH/g | |
| pH Value (1% Aqueous Solution) | 4.5~7.5 | |
| Safety and Ecology | Acute Oral Toxicity (LD50) | > 20 g/kg (Practically non-toxic) |
| Skin Irritation | Non-irritating | |
| Biodegradability | Readily biodegradable |