For purchasing managers, R&D scientists, and formulators in the chemical industry, understanding the precise specifications of raw materials is crucial for ensuring product quality and performance. Sodium Lauryl Ether Sulfate (SLES) 70%, a widely used anionic surfactant, is no exception. While the '70%' signifies the active matter content, several other technical parameters are vital for buyers to consider when sourcing this essential ingredient. This guide, provided by a leading manufacturer, outlines the key specifications of SLES 70% that buyers should focus on to make informed purchasing decisions and ensure optimal product formulation.

The Core Specification: Active Matter Content

The most prominent specification for SLES is its active matter content, typically stated as 70% for the product discussed. This refers to the percentage of the actual surfactant molecule present in the product. A higher active matter content generally indicates a more concentrated and potent product. For formulators, understanding this percentage is fundamental for calculating accurate dosage in their final products. When you buy SLES 70%, ensure the Certificate of Analysis (CoA) clearly states this value and that it meets your formulation requirements.

Key Purity Indicators:

  1. Unsulfated Matter (%): This refers to the percentage of organic material in the SLES formulation that is not the desired surfactant. High levels of unsulfated matter can indicate impurities and may affect the foaming, cleansing, and solubilizing properties of the SLES. Reputable manufacturers strive to keep this value low, typically below 2.0%. Minimizing unsulfated matter ensures a cleaner, more effective product. This is a critical metric when looking for a high-purity SLES supplier.
  2. Sodium Sulfate (%): Sodium sulfate is an inorganic salt that can be present as a byproduct of the sulfation process. While some level is often unavoidable, excessive amounts can affect the product's performance, such as its solubility and viscosity. Manufacturers aim to control this level, often keeping it below 1.5%. Excessive sodium sulfate can impact the overall formulation's stability and effectiveness.
  3. pH Value (of a specified solution): The pH indicates the acidity or alkalinity of the SLES solution. SLES is typically formulated to be in a neutral to slightly alkaline range, usually between 7.0 and 9.5 for a 1% active matter solution. An inappropriate pH can affect the stability of the SLES itself, as well as other ingredients in a formulation, and can be detrimental to skin and hair if too extreme. Consistent pH control is a hallmark of quality manufacturing.
  4. Color: SLES 70% is typically described as a white or yellowish viscous paste. While color can be subjective, significant deviations from the expected appearance, or extreme variations between batches, can sometimes indicate issues with raw materials or manufacturing processes. A consistent, acceptable color is important for product aesthetics, particularly in personal care items.

Other Important Considerations:

  • Molecular Weight: While variable due to the ethoxylation process (often around 376.48 g/mol as noted in some specifications), understanding the typical molecular weight can be helpful for advanced formulation calculations.
  • Storage and Handling: Proper storage away from highly flammable substances is essential for maintaining product integrity and safety. Suppliers should provide clear guidance on this.

Why Sourcing from a Reputable Manufacturer Matters

When you buy SLES 70%, especially in bulk, partnering with a manufacturer that adheres to stringent quality control and provides transparent specifications is paramount. A reliable SLES 70% manufacturer in China will not only offer competitive pricing but also ensure that their product consistently meets these critical purity standards. This consistency is vital for formulators who rely on predictable raw material performance for their end products, whether it's for shampoo, detergents, or industrial applications.

Conclusion

Understanding the detailed specifications of SLES 70% goes beyond the primary active matter percentage. By scrutinizing parameters like unsulfated matter, sodium sulfate content, pH, and color, buyers can ensure they are procuring a high-quality surfactant. This diligence in sourcing guarantees product consistency, optimizes formulation performance, and ultimately contributes to the success of your final products. For businesses seeking to buy Sodium Lauryl Ether Sulfate, partnering with a knowledgeable and quality-driven chemical supplier is the foundation for excellence.