Sodium dodecyl sulfate CAS#151-21-3
Excellent surface activity: Sodium dodecyl sulfate delivers outstanding emulsifying, foaming, detergency, penetration, and dispersing performance, making it highly effective in cleaning and formulation applications.
Rich and stable foam: It produces abundant, stable foam, which is ideal for detergents, personal care products, and industrial cleaners.
Good formulation compatibility: SDS is compatible with both anionic and non-ionic ingredients, allowing easy formulation with a wide range of surfactants and additives.
Fast biodegradability: It breaks down quickly in the environment, supporting more environmentally responsible and sustainable product formulations.
Sodium dodecyl sulfate is an anionic surfactant and a typical member of the sulfate surfactant family. It is commonly known as SDS and is also referred to as AS, K12, sodium coconut sulfate, sodium lauryl sulfate, or a foaming agent. Commercial products usually appear as white to pale yellow crystalline powders. They are non-toxic, slightly soluble in alcohol, insoluble in chloroform and ether, and readily soluble in water. SDS shows good compatibility with both anionic and non-ionic components. It provides excellent emulsifying, foaming, penetrating, cleaning, and dispersing performance, producing abundant foam and offering fast biodegradability. However, its solubility in water is lower than that of sodium fatty alcohol polyoxyethylene ether sulfate (AES).
Parameters
| Melting point | 204-207 °C (lit.) |
| density | 1.03 g/mL at 20 °C |
| bulk density | 490-560kg/m3 |
| 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 |
| Odor | Slight fatty odour |
| PH Rane | 7.2 |
| PH | 6-9 (10g/l, H2O, 20℃) |
| biological source | synthetic (oragnic) |
| Water Solubility | ca. 150 g/L (20 ºC) |
| λmax | λ: 260 nm Amax: 0.3 |
| λ: 280 nm Amax: 0.2 | |
| Merck | 148,636 |
| 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) |
| Absorption | ≤0.1 at 280nm in water at 30mg/mL |
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) |
Sodium dodecyl sulfate provides strong cleaning, emulsifying, and foaming performance. It is used as a detergent and textile auxiliary and is widely applied in many fields, including anionic surfactants, toothpaste foaming agents, mine fire extinguishing agents, fire-fighting foams, emulsion polymerization emulsifiers, and pharmaceutical emulsifying and dispersing agents. It is also found in cosmetic products such as shampoos, wool detergents, and cleaners for fine silk and wool fabrics. In addition, it is used as a flotation agent in metal ore beneficiation.
Under the GB 2760-96 standard, it is approved as a processing aid in the food industry, where it functions as a foaming agent, emulsifier, and anionic surfactant. It is applied in products such as cakes, beverages, protein products, fresh fruits, fruit juice drinks, and edible oils.
