Sodium Lauryl Ether Sulfate 70% (SLES 70% / Texapon N70) Drum 170kg

SLES 70% (Sodium Lauryl Ether Sulfate) – High-Purity Anionic Surfactant for Cosmetics

SLES 70% or Sodium Lauryl Ether Sulfate is a high-grade anionic surfactant for cosmetics manufactured by continuous SO₃ sulfation of a narrow-cut, natural fatty alcohol ethoxylate, followed by precision neutralization with caustic soda. Supplied as a pale straw pourable paste with an active matter content of 70.0 ± 2.0%, this refined surfactant features exceptional flash-foaming, rapid water solubility, and verified mildness. With 1,4-Dioxane strictly restricted below 20 ppm, sles serves as a primary foaming and cleansing agent across luxury shampoos, foam bath preparations, body washes, and household liquid detergents. THP Chemical is an authorized distributor offering commercial manufacturers reliable access to buy sles 70 bulk with verified batch consistency and complete regulatory compliance.

Technical Specification Standards - Sodium Lauryl Ether Sulfate 70%

Technological Properties & Advantages of RSAW ESB70/ZA

• 2EO Ethoxylate Modification for Skin Mildness: Compared to unethoxylated Sodium Lauryl Sulfate (SLS), inserting two ethylene oxide (2EO) moieties increases hydrophilicity, lowers the critical micelle concentration (CMC), and significantly mitigates cutaneous irritation. This allows formulators to create rich personal cleansing formulations that respect the dermal moisture barrier.
• High Foaming Capacity & Salt Viscosity Build: SLES 70% generates stable, dense, and creamy lather even in hard water conditions. The surfactant exhibits an exceptional thickening response when adjusted with common electrolytes (Sodium Chloride) or secondary amphoteric betaines (CAPB), allowing effortless viscosity control without costly polymeric rheology modifiers.
• Ultra-Low 1,4-Dioxane Content (≤ 20 ppm): Synthesized via advanced vacuum degassing during continuous SO₃ falling-film sulfation, trace 1,4-Dioxane levels are strictly maintained below 20 ppm, ensuring full compliance with international safety regulations, including European (EC) No 1223/2009 and ASEAN Cosmetic Directives.
• Built-in Citric Acid Anti-Hydrolysis Buffer: The paste is stabilized with a controlled level of citric acid to maintain a slightly alkaline buffer (pH 7.0 – 9.0). This prevents autocatalytic acid hydrolysis of the ether sulfate bond during prolonged storage.

Multi-Sector Applications Across Personal Care & Detergents

Engineered for high cleansing efficiency and sensory richness, sodium lauryl ether sulfate 70 is a fundamental ingredient across diverse consumer industries:

• Cosmetics & Personal Care Formulations:
  • Hair Shampoos: Primary surfactant for lifting sebum, scalp dirt, and styling residues while leaving hair fibers manageable and lustrous.
  • Body Washes & Foam Bath Preparations: Delivers high flash-foam volume, velvety lather stability, and an easy-rinse after-feel.
  • Facial Cleansers & Liquid Hand Soaps: Blended with mild secondary surfactants (betaines, glucosides) to provide effective yet gentle hygiene.
• Household & Industrial Detergents:
  • Premium Manual Dishwashing Liquids: Excellent grease-cutting emulsification that strips baked-on culinary oils without leaving watermarks.
  • Concentrated Liquid Laundry Detergents: Compatible with anionic and nonionic builders, delivering deep soil release across diverse fabrics.

Technical Handling Guidelines, Dilution Protocol & Storage Conditions

• CRITICAL DILUTION DIRECTIVE (AVOIDING HIGH VISCOSITY GEL PHASES):
  • ALWAYS SLOWLY ADD SLES 70% PASTE INTO WATER under continuous, moderate-speed mechanical agitation.
  • NEVER ADD WATER DIRECTLY INTO SLES 70% PASTE. In the intermediate concentration zone between 30% and 60% active matter, alkyl ether sulfates transition into an extremely rigid, hexagonal lyotropic liquid crystal phase (the "M-Gel Phase"). This gel phase is unpumpable, virtually insoluble under standard stirring, and can burn out blending drive motors. Introducing paste gradually into bulk water bypasses this phase, creating a smooth micellar solution.
• Recommended Storage Temperature Range: Store within 15°C to 40°C.
  • Overheating Risk (> 40°C): Never subject containers to temperatures exceeding 40°C. High temperatures, especially combined with acidity, trigger rapid autocatalytic cleavage of the sulfate bond, decomposing the surfactant into free alcohol and generating hazardous exothermic pressure.
  • Freezing Point Behavior (< 10°C): SLES 70% has a freezing point of approximately 10°C. Storage below this temperature causes solidification and phase separation. If frozen, warm slowly and indirectly with gentle, uniform agitation; never apply localized high-intensity heat.
• Acid Incompatibility: Strictly prevent contact with strong mineral acids during raw material handling (maintain pH above 5.0), as low pH exhausts the internal citric acid buffer and promotes rapid product degradation.

Commercial Supply Policy at THP Chemical

Tan Hung Phú Chemical Co., Ltd. (THP Chemical) is a premier direct importer and wholesale distributor of SLES 70% supplying personal care formulators, contract cosmetic manufacturers, and detergent enterprises nationwide:

• 100% genuine factory imports meeting technical standards: 70.0 ± 2.0% active matter, with 1,4-Dioxane guaranteed ≤ 20 ppm.
• Original packaging formats: 170 kg / 220 kg Net heavy-duty plastic drums or 1,000 kg IBC totes with intact factory seals.
• Comprehensive compliance documentation: Batch-specific Certificate of Analysis (COA), 16-section Material Safety Data Sheet (MSDS), and legal commercial VAT invoices provided with each dispatch.
• Substantial ready-stock inventories maintained at our central Ho Chi Minh City logistics center, supporting rapid palletized delivery nationwide and providing laboratory trial samples with competitive volume pricing.

Frequently Asked Questions (FAQ)

1. Why must SLES 70% always be added to water, and never water to SLES?

When water is poured into concentrated 70% paste, the active concentration drops into the 30%–60% range, where the molecules form a rigid liquid crystalline hexagonal gel ("M-Gel"). This structure locks water inside, resists dissolution, and can jam mixing impellers. Adding paste slowly into water keeps the active concentration below 25%, where it remains in a low-viscosity, free-flowing micellar state that dissolves easily.

2. How does Sodium Lauryl Ether Sulfate (SLES) differ from Sodium Lauryl Sulfate (SLS)?

SLES contains ethoxylate groups (-OCH₂CH₂-) between the hydrophobic fatty alcohol chain and the hydrophilic sulfate group. This modification reduces the critical micelle concentration, making SLES significantly gentler on skin and eyes than SLS, while enhancing cold-water solubility and maintaining excellent lather performance.

3. What happens if SLES 70% is stored above 40°C or exposed to acidic conditions?

Alkyl ether sulfates are prone to acid-catalyzed hydrolysis. If exposed to temperatures above 40°C or low pH (< 5.0), the ether-sulfate ester bond hydrolyzes into free fatty alcohol and sulfuric acid. This exothermic decomposition generates heat, permanently degrades foaming performance, and ruins the batch.

4. Does THP Chemical provide batch-specific COAs and technical support?

Yes. THP Chemical supplies original batch-specific factory Certificates of Analysis (COA), comprehensive MSDS sheets, and commercial VAT invoices with every shipment to satisfy corporate QA/QC and regulatory audits for cGMP-compliant manufacturing.