Product Description
Sodium dodecyl sulfate (SDS), with the chemical formula C₁₂H₂₅NaO₄S, is a highly effective anionic surfactant that is readily soluble in water. It is widely recognized for its excellent emulsifying, foaming, and wetting properties.
SDS appears as a white crystalline powder and is extensively used in the formulation of detergents, cleaning products, and personal care items. It also plays a key role in biochemical applications, particularly as a denaturing agent in protein electrophoresis.
The product has a molecular weight of approximately 288.4 g/mol, high water solubility, a critical micelle concentration (CMC) of around 8 mM, and a melting point above 200°C.
For optimal stability, it should be stored in tightly sealed containers, protected from light and moisture, and maintained at 2–8°C. Due to its potential to cause irritation, appropriate safety precautions and protective equipment should be used during handling.
Properties
| Melting point | 204-207 °C (lit.) |
| density | 1.03 g/mL at 20 °C |
| FEMA | 4437 | SODIUM LAURYL SULFATE |
| Fp | >100°C |
| storage temp. | 2-8°C |
| solubility | H2O: 0.1 M, clear to nearly clear, colorless to slightly yellow |
| form | Powder or Crystals |
| color | White to pale yellow |
| PH | 6-9 (10g/l, H2O, 20℃) |
| Odor | Slight fatty odour |
| PH Range | 7.2 |
| Water Solubility | ca. 150 g/L (20 ºC) |
| λmax | λ: 260 nm Amax: 0.3 |
| λ: 280 nm Amax: 0.2 | |
| Merck | 148636 |
| BRN | 3599286 |
| InChIKey | DBMJMQXJHONAFJ-UHFFFAOYSA-M |
| LogP | 1.6 |
| CAS DataBase Reference | 151-21-3(CAS DataBase Reference) |
| EPA Substance Registry System | Sodium lauryl sulfate (151-21-3) |
Safety Information
| Hazard Codes | F,Xn,Xi |
| Risk Statements | 36/37/38-36/38-22-11-21/22-42-41-20/21/22-37/38 |
| Safety Statements | 26-36/37-36/37/39-36-22-39 |
| RIDADR | UN 2926 4.1/PG 2 |
| WGK Germany | 2 |
| RTECS | WT1050000 |
| F | 3 |
| TSCA | Yes |
| HazardClass | 4.1 |
| PackingGroup | III |
| HS Code | 29209010 |
| Hazardous Substances Data | 151-21-3(Hazardous Substances Data) |
| Toxicity | LD50 orally in rats: 1288 mg/kg (Walker) |
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