Polyethylene Glycol (PEG) is a versatile polymer with a range of molecular weights, each offering distinct properties and applications. While higher molecular weight PEGs (e.g., PEG 4000, PEG 6000) are often solid at room temperature and used for different purposes, Polyethylene Glycol 400 (PEG 400) stands out due to its unique liquid form and solubility characteristics. For procurement specialists and R&D scientists, understanding these differences is crucial for selecting the right grade. As a leading manufacturer and supplier of PEG 400 in China, we provide insights to help you make informed decisions.

The primary distinguishing factor between PEG 400 and its higher molecular weight counterparts is their physical state at ambient temperatures. PEG 400, with a molecular weight below 700, is a clear, odorless, viscous liquid. This liquid nature makes it exceptionally easy to handle, measure, and incorporate into formulations without the need for heating or specialized dissolving equipment, which is often required for solid PEGs. This ease of use is a significant advantage when you need to buy Polyethylene Glycol 400 for applications where rapid formulation is key.

In terms of solubility, PEG 400 demonstrates excellent miscibility with water and a broad range of polar organic solvents like ethanol and glycerol. Higher molecular weight PEGs also exhibit water solubility, but their solubility in organic solvents can vary and often decreases as the molecular weight increases. This enhanced solubility in a wider array of solvents makes PEG 400 a preferred choice for applications requiring precise mixing and stable solutions, such as in certain pharmaceutical preparations, cosmetics, and industrial solvents. When you are looking to purchase Polyethylene Glycol 400, you are often seeking this specific solubility profile.

Application areas also diverge significantly. PEG 400 is widely used as a solvent, humectant, plasticizer, and surfactant intermediate in industries like pharmaceuticals (for oral, topical, and parenteral formulations), cosmetics (in lotions, creams, and shampoos), and personal care products. Its low molecular weight also allows it to penetrate the skin more readily than higher molecular weight PEGs. Higher molecular weight PEGs, being solids, are often used as lubricants, tablet binders, or in applications where a solid excipient is required. For instance, PEG 6000 might be used as a lubricant in tablet manufacturing, whereas PEG 400 might be the vehicle for a liquid medication.

For businesses seeking to procure PEG 400, understanding its specific benefits over higher molecular weight PEGs can guide purchasing decisions. The competitive pricing offered by manufacturers like us, combined with the ease of handling and broad solvency, makes PEG 400 a highly cost-effective and versatile organic intermediate. We encourage you to contact us for a quote and to discuss your specific application needs. As a reliable supplier, we can help you choose the right PEG grade and ensure consistent quality and timely delivery. Understanding these distinctions allows you to effectively buy Polyethylene Glycol 400 and maximize its potential in your products.