Sodium Lauryl Ether Sulfate, commonly abbreviated as SLES and identified by CAS Number 68585-34-2, is a foundational chemical in the surfactant industry. Its widespread application across personal care, household cleaning, and various industrial sectors underscores its versatility and effectiveness. For procurement specialists and R&D professionals, a thorough understanding of SLES—its chemical identity, manufacturing process, key properties, and applications—is vital for optimal sourcing and formulation. This guide provides a detailed overview of SLES, emphasizing its importance and how to source it efficiently from manufacturers and suppliers.

Chemical Identity and Production of SLES

SLES is an anionic surfactant characterized by its ability to reduce surface tension in aqueous solutions. Its structure typically consists of a C10-C16 alkyl chain, an ethoxylated ether linkage, and a sulfate group esterified with sodium. This ethoxylation process, adding polyoxyethylene chains, differentiates it from Sodium Lauryl Sulfate (SLS) and contributes to its milder nature and enhanced solubility.

The production of SLES involves a multi-step chemical synthesis:

  1. Ethoxylation of Fatty Alcohols: Natural or synthetic fatty alcohols (often C12-C14) are reacted with ethylene oxide to create alcohol ethoxylates.
  2. Sulfation: The alcohol ethoxylates are then reacted with a sulfating agent (e.g., SO3) to form an alkyl ether sulfate.
  3. Neutralization: The resulting acid is neutralized with a sodium base, typically sodium hydroxide, to yield the sodium salt, SLES.

Reputable manufacturers in China adhere to stringent quality control measures throughout this process to ensure high purity, consistent active matter content (commonly 70%), and minimal by-product formation, such as 1,4-dioxane.

Key Properties and Benefits of SLES

SLES is valued for its comprehensive performance profile:

  • Excellent Foaming and Cleansing: It generates abundant, stable lather and effectively lifts and removes oils and dirt.
  • Good Emulsification: SLES acts as an effective emulsifier, blending oil and water phases in formulations.
  • Mildness: It is generally considered milder on skin and eyes than many other surfactants.
  • Water Solubility: Highly soluble in water, performing well even in the presence of hard water ions.
  • Biodegradability: Possesses good biodegradability, making it a more environmentally conscious choice.
  • Cost-Effectiveness: Offers a strong performance-to-cost ratio, making it an economical choice for mass-market products.

Diverse Applications Across Industries:

  • Personal Care: Shampoos, body washes, facial cleansers, toothpaste.
  • Household Cleaning: Dish soap, laundry detergents, general-purpose cleaners.
  • Industrial Cleaning: Degreasers, metal cleaners, textile auxiliaries.
  • Agriculture: As a wetting agent in pesticide formulations.

Sourcing SLES 68585-34-2: Partnering with Manufacturers

For businesses seeking to purchase SLES, especially in bulk, sourcing from established Chinese manufacturers and suppliers is a strategic decision. Prioritizing suppliers with strong quality control, reliable logistics, competitive pricing, and responsive customer service ensures a consistent and high-quality supply chain. When inquiring, always confirm the product specifications, purity levels, and any necessary certifications.

Sodium Lauryl Ether Sulfate (CAS 68585-34-2) remains a cornerstone surfactant due to its remarkable performance, versatility, and economic advantages, making it an essential ingredient for formulators worldwide.