SLES 70% vs. SLS: Understanding the Differences for Optimal Formulation
NINGBO INNO PHARMCHEM CO.,LTD. frequently addresses inquiries regarding Sodium Lauryl Ether Sulfate 70% (SLES 70%) and its counterpart, Sodium Lauryl Sulfate (SLS). While both are anionic surfactants and share similar names, understanding their differences is crucial for formulators seeking to optimize product performance and safety, particularly in personal care applications.
The primary distinction lies in their chemical structure. SLES 70% is ethoxylated, meaning it contains repeating ethoxy groups (–OCH2CH2–) linked to the dodecyl chain before the sulfate group. SLS, on the other hand, lacks these ethoxy groups. This structural difference significantly impacts their properties.
The ethoxylation process in SLES 70% results in a milder surfactant. This means SLES 70% is generally less irritating to the skin and eyes compared to SLS. This enhanced mildness makes SLES 70% a preferred choice for products intended for direct skin contact, such as shampoos, body washes, and facial cleansers, where consumer sensitivity is a key consideration. While SLS is also a highly effective cleanser and foaming agent, its harsher nature often leads to dryness and irritation, limiting its use in leave-on products or formulations for sensitive skin.
In terms of performance, both surfactants offer excellent detergency and foaming. However, SLES 70% often exhibits better solubility and stability in hard water, which can be an advantage in various formulations. For NINGBO INNO PHARMCHEM CO.,LTD., supplying SLES 70% means providing an ingredient that offers a superior balance of cleansing power, foaming ability, and consumer-friendly mildness.
When choosing between SLES 70% and SLS, formulators must consider the specific application, desired product profile, and target consumer. For general cleaning products or industrial applications where extreme mildness is not the primary concern, SLS might be considered. However, for the vast majority of personal care products and mild household cleaners, SLES 70% presents a more advantageous and widely accepted option due to its improved safety and performance profile.
Perspectives & Insights
Bio Analyst 88
“This enhanced mildness makes SLES 70% a preferred choice for products intended for direct skin contact, such as shampoos, body washes, and facial cleansers, where consumer sensitivity is a key consideration.”
Nano Seeker Pro
“While SLS is also a highly effective cleanser and foaming agent, its harsher nature often leads to dryness and irritation, limiting its use in leave-on products or formulations for sensitive skin.”
Data Reader 7
“However, SLES 70% often exhibits better solubility and stability in hard water, which can be an advantage in various formulations.”