For B2B buyers in the chemical and pharmaceutical industries, understanding the precise specifications of raw materials is fundamental to successful product development and manufacturing. Polyethylene Glycol (PEG) is a prime example, available in numerous grades characterized by varying molecular weights, purities, and functionalities. Navigating these specifications can be complex, but by working with a knowledgeable manufacturer and supplier, you can make informed purchasing decisions. NINGBO INNO PHARMCHEM CO.,LTD., a leading manufacturer in China, is committed to providing clarity and high-quality Polyethylene Glycol to meet your diverse needs. If you need to buy Polyethylene Glycol, understanding these key metrics is your first step.

The most critical specification for Polyethylene Glycol is its molecular weight. This is often indicated by a number following the PEG acronym, such as PEG 400 or PEG 8000. The molecular weight directly dictates the physical properties: lower molecular weights (e.g., PEG 200-600) are typically clear liquids, while higher molecular weights (e.g., PEG 4000-8000+) are waxy solids. Liquid PEGs are excellent solvents and humectants, widely used in cosmetics and pharmaceuticals, while solid PEGs serve as binders and bases. Knowing your application's requirement for viscosity, solubility, and state at room temperature is key to selecting the correct PEG grade. As a reliable PEG 400 supplier, we offer detailed specifications for all our products.

Purity is another paramount specification, especially for pharmaceutical and cosmetic applications. Pharmaceutical grade PEGs typically require high purity levels, often exceeding 99%, with strict limits on impurities such as heavy metals, residual monomers, and other potential contaminants. Industrial grades may have slightly different purity requirements depending on the application. Always check the Certificate of Analysis (CoA) provided by your supplier to ensure it meets your project's standards. At NINGBO INNO PHARMCHEM, we ensure our products, including our Polyethylene Glycol 400 price range, are backed by comprehensive quality documentation.

The CAS Number is also a critical identifier. For Polyethylene Glycol, the most common CAS number is 25322-68-3, which covers a range of molecular weights. However, specific molecular weight ranges might have associated CAS numbers or be referred to by generic descriptors. For example, when seeking to purchase Polyethylene Glycol, you might also encounter specific identifiers related to its origin or intended use, such as 'Industrial Grade' or 'Pharmaceutical Excipient Grade'. Clarifying these with your Polyethylene Glycol manufacturer in China is essential.

Other important specifications can include hydroxyl value, moisture content, color (APHA), and pH. These parameters provide further insights into the product's quality and suitability for specific applications. For instance, a low moisture content is crucial for many solid-state applications, while a specific hydroxyl value can indicate the degree of polymerization. By understanding these technical details, buyers can confidently select the right PEG for their formulation needs. NINGBO INNO PHARMCHEM CO.,LTD. is your trusted partner for navigating these specifications and securing the best Polyethylene Glycol for your business. Contact us today to discuss your requirements and to receive a quote.