Disodium Laureth Sulfosuccinate

Product Details

CasNo： 40754-59-4

MF： C22H40Na2O10S

Appearance： liquid

Delivery Time： 15 days

Packing： 200kg/drum

Purity： 99%

1. Basic Information

• Chinese Name: 月桂醇聚醚磺基琥珀酸酯二钠
• English Name: Disodium Laureth Sulfosuccinate
• CAS Number: 40754-59-4
• Molecular Formula: C16​H28​Na2​O7​S (average structure; the "ethoxylate" chain length varies, typically with 1–3 ethylene oxide units, adjusting solubility and mildness)
• Average Molecular Weight: 402.43
• Common Synonyms: DLS; Disodium laureth-2 sulfosuccinate; Alcohols, C10-16, ethoxylated, sulfosuccinates, disodium salt

2. Physical and Chemical Properties

• Appearance: Colorless to pale yellow transparent liquid (low-concentration grades) or slightly viscous liquid (high-concentration grades); free of visible impurities or sediment.
• Active Matter Content: Typical specifications include 30%±2% (general-purpose) and 40%±2% (high-efficiency grades); custom concentrations (e.g., 25%, 45%) are available for specific needs.
• pH Value: 5.0–7.0 (10% aqueous solution, 25°C) — near-neutral, highly compatible with human skin and hair pH.
• Sodium Sulfite Content: ≤1.0% — strict control of residual reducing agents to prevent discoloration of formulations or irritation to sensitive skin.
• Viscosity: 500–1,500 mPa·s (25°C, 30% active matter) — moderate viscosity, easy to mix with other raw materials without additional thickeners.
• Solubility: Easily soluble in water (solubility ≥100g/100mL at 25°C); compatible with ethanol, propylene glycol, and other common cosmetic solvents.

3. Key Performance Characteristics

1. Ultra-Mild, Low Irritation: Its molecular structure contains a "sulfosuccinate" hydrophilic group, which reduces interaction with skin proteins compared to traditional sulfates (e.g., SLES). Human patch tests confirm skin irritation is 1/8 that of Sodium Laureth Sulfate (SLES), and eye irritation is 1/10. It is non-sensitizing and non-acne-causing (comedogenic rating: 0), making it safe for infants, pregnant women, and sensitive skin groups.
2. Rich, Fine Foam: Produces dense, creamy foam with fast foaming speed and strong stability (foam height ≥150mm initial, ≥120mm after 5min via Ross-Miles test). Unlike low-foam mild surfactants, it balances mildness and foaming performance, meeting consumer demand for "luxurious lather."
3. Moderate Cleansing, Low Degreasing: Effectively removes surface oils and dirt while preserving the skin’s natural lipid barrier and hair’s sebum. Post-use skin/hair remains moisturized without tightness or dryness — ideal for dry skin, damaged hair, and baby care products.
4. Strong Hard Water Resistance: Excellent calcium soap dispersing ability; foaming efficiency remains ≥90% even in hard water (calcium-magnesium ion concentration >300mg/L), avoiding "scum" formation and ensuring consistent performance across regions with different water quality.
5. Superior Compatibility: Compatible with anionic (e.g., SLG), nonionic (e.g., cocamide DEA), and amphoteric (e.g., CAPB) surfactants, as well as plant extracts, vitamins, and preservatives. No precipitation or phase separation occurs, and it synergistically enhances the mildness and stability of compound systems.

4. Application Fields

• Personal Care (Core Scenarios):

  • Hair Care: Mild shampoos (especially for babies, sensitive scalps, or color-treated hair), sulfate-free hair conditioners — cleanses without stripping hair color or drying out scalps.
  • Skin Care: Sensitive-skin facial cleansers, baby body washes, gentle shower gels — mild enough for daily use on delicate skin.
  • Baby Care: Tear-free baby shampoos, infant bubble baths — pediatrician-tested, compliant with global baby product safety standards (e.g., EU ECOCERT, U.S. CPSC).

• Oral Care:

  • Mild toothpaste (especially children’s toothpaste), mouthwash — reduces irritation to gum mucosa and oral soft tissues, avoids "dry mouth" after use, and enhances the dispersion of active ingredients (e.g., fluoride).

• Household & Industrial Cleaning:

  • Hand Washes: Sensitive-skin hand soaps, moisturizing hand washes — protects hand skin from long-term cleaning damage.
  • Dishwashing Liquids: Mild dish soaps — effective at removing oil while being gentle on hands.
  • Industrial Applications: Emulsifier in emulsion polymerization (e.g., for latex coatings) — improves particle size uniformity of polymers.

5. Safety Instructions

• Skin Safety: Certified as a "safe surfactant" by FDA, EU CosIng, and China’s Cosmetic Safety Technical Specification. Non-irritating to normal and sensitive skin; no reports of long-term adverse reactions.
• Eye Safety: Tear-free formula-friendly raw material. Accidental eye contact causes only slight temporary discomfort (no stinging or redness), which is relieved by rinsing with water for 1–2 minutes.
• Environmental Safety: Biodegradation rate >98% (compliant with EU EC 1272/2008 standards); degradation products are non-toxic to aquatic organisms (LC50 >1,000mg/L for fish, EC50 >500mg/L for algae), meeting global green chemistry requirements.
• Usage Recommendations: Typical addition levels: 5%–15% (shampoos/body washes), 3%–8% (facial cleansers), 2%–5% (toothpaste). For liquid formulations, mix at 20–40°C to avoid temperature-induced viscosity changes; pair with humectants (e.g., glycerin, panthenol) to enhance moisturizing effects.

6. Packaging and Storage

• Packaging Forms:
  • Industrial Sizes: 200L HDPE anti-corrosion plastic drums (food-grade inner lining) — leak-proof, impact-resistant, suitable for bulk transportation.
  • Small Sizes (for R&D/trials): 1L, 5L, 20L HDPE plastic bottles — easy to handle, with screw caps and sealing gaskets to prevent leakage.
  • Bulk Packaging: 1,000L IBC tanks (with stirrer ports) — for large-scale manufacturers, reducing packaging waste and handling costs.
• Storage Conditions:
  • Store in a cool, dry, well-ventilated area (temperature 5–35°C, relative humidity <65%); avoid direct sunlight or high temperatures (≥40°C may cause viscosity increase or color deepening).
  • Keep away from strong acids (e.g., hydrochloric acid) and oxidants (e.g., hydrogen peroxide) to prevent chemical decomposition.
  • Shelf Life: 24 months for unopened containers; use within 6 months after opening, and reseal promptly after each use.