Polyethylene Glycol 3350 (PEG 3350) is a workhorse polymer with a unique combination of properties that make it indispensable across numerous industries, from pharmaceuticals and cosmetics to various industrial manufacturing processes. Understanding these properties and applications is key for formulators and procurement professionals looking to effectively source and utilize this versatile chemical. This guide aims to provide a comprehensive overview, helping you make informed decisions when you need to buy PEG 3350.

Key Properties of PEG 3350
The versatility of PEG 3350 stems from its fundamental characteristics:

  • Solubility: It is highly soluble in water and many organic solvents, making it an excellent medium for various chemical reactions and formulations.
  • Hygroscopicity: PEG 3350 readily absorbs moisture from the air, which makes it useful as a humectant in cosmetic and pharmaceutical products to retain moisture.
  • Lubricity: It provides excellent lubricating properties, reducing friction and preventing adhesion, which is vital in tablet manufacturing and as a surface lubricant.
  • Chemical Inertness: PEG 3350 is generally chemically stable and non-reactive, ensuring it does not interfere with active ingredients or other components in a formulation.
  • Biocompatibility: Higher grades, such as USP, are biocompatible, making them safe for use in pharmaceuticals and some cosmetic applications.

Diverse Applications of PEG 3350
The unique property profile of PEG 3350 leads to its broad applicability:

  • Pharmaceuticals: As mentioned, it's a primary lubricant for tablets and capsules. It also serves as a base for ointments, suppositories, and as a non-ionic surfactant in liquid formulations. Its role as an osmotic laxative is also significant.
  • Cosmetics: In skincare and haircare products, it functions as a humectant, emulsifier, solvent, and thickener, contributing to product texture and efficacy.
  • Industrial Manufacturing: It’s used in the formulation of inks, dyes, adhesives, and as a plasticizer for various polymers. Its lubricating properties also benefit mold release agents.
  • Medical Devices: Its inert nature and lubricity are leveraged in coatings for medical devices to reduce friction during insertion or use.

How to Buy PEG 3350 Effectively
For procurement professionals and formulators aiming to secure a reliable supply of PEG 3350, consider these points:

  • Specify Grade Requirements: For pharmaceutical or cosmetic use, always opt for USP, BP, or EP grade. For general industrial applications, a technical grade might suffice, but confirm purity levels.
  • Source from Reputable Manufacturers: Identify manufacturers with strong quality control systems and a history of consistent product delivery. Companies in China, with significant production capacities (e.g., 6000 tons/year), are major global suppliers.
  • Evaluate Pricing Structures: Compare the PEG 3350 price across different suppliers. Take advantage of bulk purchasing discounts, which are substantial for large volumes like 10,000+ kg.
  • Check Certifications and CoA: Always request Certificates of Analysis (CoA) for each batch to verify compliance with stated specifications and regulatory standards.
  • Consider Logistics and Lead Times: Factor in shipping costs, customs clearance, and production lead times when planning your procurement. Suppliers with extensive export experience (over 10 years) can streamline this process.

By understanding the properties and applications of PEG 3350 and adopting a strategic approach to sourcing, businesses can confidently procure this essential chemical intermediate, ensuring both quality and cost-effectiveness for their production needs. Whether you are looking for pharmaceutical grade PEG 3350 or an industrial chemical intermediate, a well-informed purchase is the first step to product success.