Skip to content 
CAS 151-21-3 Sodium lauryl sulfate
Overview
Sodium lauryl sulfate (SLS; sodium dodecyl sulfate/SDS; CAS 151-21-3; C₁₂H₂₅NaO₄S, ~288.38 g/mol) is a high-foaming anionic surfactant delivering strong detergency, wetting/penetration, emulsification, and solubilization in personal care (shampoos, body/face cleansers, toothpastes), HI&I cleaners, textile/leather processing, emulsion polymerization/latex, and laboratory applications (e.g., SDS-PAGE).
Product Description
CAS 151-21-3 Sodium lauryl sulfate
Product Characteristics — Sodium Lauryl Sulfate (SLS, CAS 151-21-3): High-foaming anionic surfactant delivering strong detergency, wetting/penetration, emulsification, and solubilization; forms stable micelles (CMC ~8–9 mM at 25 °C) for rapid foam build and soil dispersion;
Sodium Lauryl Sulfate (SLS) — Product Specification
CAS: 151-21-3 | Formula: C12H25NaO4S | Molecular weight: ~288.38 g/mol | Synonyms: Sodium dodecyl sulfate; SDS
Identity & Form
| Product form | White needles/flakes or powder (≈90–95% active); 28–30% aqueous paste |
|---|---|
| Solubility | Readily soluble in water and alcohol–water; limited in cold water saturation; insoluble in non-polar hydrocarbons |
| Main functions | Detergent, wetting/penetration, emulsifier/solubilizer, foam builder |
| Documents | COA · TDS · SDS |
Typical Specification — Powder/Flake Grade (example)
| Active matter (as SLS) | ≥ 92.0% (titration) |
|---|---|
| Moisture / Loss on drying | ≤ 5.0% (105 °C) |
| Sodium sulfate (Na2SO4) | ≤ 5.0% (w/w) |
| Sodium chloride (NaCl) | ≤ 1.0% (w/w) |
| Unsulfated matter | ≤ 2.0% (w/w) |
| pH (1% aq., 25 °C) | 7.5 – 9.5 |
| Color (APHA) | ≤ 50 |
| Appearance | White, free-flowing needles/flakes or powder; no visible foreign matter |
Typical Specification — 28–30% Paste (example)
| Active matter (as SLS) | 28.0 – 30.0% (w/w) |
|---|---|
| Sodium sulfate (Na2SO4) | ≤ 1.5% (w/w) |
| Sodium chloride (NaCl) | ≤ 1.5% (w/w) |
| Unsulfated matter | ≤ 1.0% (w/w) |
| pH (10% aq., 25 °C) | 7.0 – 9.5 |
| Color (APHA) | ≤ 80 |
| Appearance | White to off-white paste |
Applications & Handling
| Main uses | Shampoos/body & face washes, toothpastes, HI&I cleaners, textile/leather processing, emulsion polymerization/latex, lab use (SDS-PAGE) |
|---|---|
| Handling | Dust/solutions are irritating; sensitive to hard-water ions (Ca2+/Mg2+)—use chelators or softened water; avoid strong oxidizers; ensure ventilation and PPE per SDS |
| Storage | Keep tightly closed, cool and dry; protect from moisture and contamination |
Packaging & Logistics
| Packaging | 20–25 kg bags / fiber drums (powder); 200 kg drums · 1000 L IBC (paste) |
|---|---|
| Ports | Qingdao · Shanghai · Tianjin |
| To quote (please specify) | Grade (powder or paste), pack size, destination country/port, and required documents |
© Shandong Yinglang Chemical CO.,LTD · Information for B2B technical marketing only.
PACKING AND DELIVERY
Packing and delivery
We offer secure and compliant packaging for a wide range of chemical products, from laboratory bottles (100 mL, 250 mL, 500 mL) to customized bulk containers. All shipments follow international hazardous goods standards and include complete documentation such as COA and SDS. With reliable global logistics partners, we ensure safe, fast, and efficient delivery by air, sea, or land according to customer needs.