Shandong Huashang Chemical Co., Ltd. is a high-tech enterprise focused on industry of fine chemicals research and develop, produce and sale. Shandong Huashang Chemical Co., Ltd. is located in Shan Dong Ji Nan China. we have the ability to provide you high quality products. More than 90 % of our products are exported to developed countries and regions such as north America, Europe, Japan, South Korea and the Middle East.
1. Basic Information
Name: Sodium dodecyl sulfate
Alias: SDS, Sodium lauryl sulfate
CAS No.: 151-21-3
Molecular Formula: C12H25NaO4S1
Molecular Weight: 288.38
2. Physical and Chemical Properties
Physical Properties
- Appearance: White or pale yellow crystalline powder
- Odor: Slight characteristic organic odor
- Solubility: Freely soluble in H2O, methanol; slightly soluble in C2H5OH; insoluble in C6H6, acetone, mineral oil
- Melting Point: 204–207 °C (decompose)
- Hygroscopicity: Slightly hygroscopic under high humidity
- Aqueous property: Anionic surfactant, aqueous solution presents foaming, emulsifying, wetting performance
Chemical Properties
- Molecular Structure: Straight-chain alkyl sulfate salt, contains long alkyl hydrophobic group and -OSO3Na hydrophilic group
- Acid-base stability: Stable under neutral and weak alkaline environment; hydrolyze under strong acid heating to generate dodecanol
- Ion compatibility: Precipitate when mixed with cationic surfactants, heavy metal ions
- Thermal stability: Stable below 100 °C; high temperature accelerates hydrolysis and decomposition
- Photostability: Stable under indoor light, no obvious discoloration
- Surface activity: Strong denaturation to protein, widely used for protein electrophoresis
3. Main Application Fields
1. Biochemical Laboratory Reagent (Core Application)
- Protein denaturant for SDS-PAGE electrophoresis, cell lysis buffer raw material
- Membrane protein extraction reagent, nucleic acid purification surfactant
2. Daily Chemical Raw Material
Foaming agent, emulsifier, detergent for shampoo, hand sanitizer, laundry detergent, industrial cleaning agent
3. Coating & Textile Auxiliary
Wetting agent, dispersant for textile printing and dyeing; emulsion stabilizer for water-based coatings
4. Industrial Auxiliary Additive
Electroplating brightener additive, oil field foaming agent, pesticide suspension dispersant
4. Quality Specification Table
| Test Item | Standard Index |
| CAS Number | 151-21-3 |
| Molecular Formula | C12H25NaO4S1 |
| Appearance | White crystalline powder |
| Active Matter Content | Biochemical Grade ≥99.0%; Industrial Grade ≥95.0% |
| Water Content (KF) | ≤1.00% |
| Free Alcohol | ≤0.50% |
| Heavy Metals (Pb1) | Biochemical grade ≤10 ppm |
| Packaging | 25kg PE lined fiber drum / woven bag |
| Storage Condition | Hermetic cool dry warehouse below 25 °C; isolated from cationic substances and strong acid |
| Transportation Requirement | Irritating surfactant solid, moisture-proof sealed packaging |
| Shelf Life | 36 months under intact sealed packaging |
Safety Warning
Strong irritant powder. Dust severely irritates eyes, skin and respiratory tract; long-term skin contact causes degreasing, dry cracking and dermatitis. Wear dust mask, chemical-resistant gloves and full-face goggles during operation with ventilation. Avoid mixing with cationic surfactants to produce flocculent precipitate. Waste liquid needs neutralization treatment before discharge; solid waste belongs to organic chemical hazardous waste for centralized disposal.
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