Sodium dodecyl sulfate (SDS) is an anionic surfactant with the chemical formula C₁₂H₂₅OSO₃Na, and is widely used in fields such as biochemistry, molecular biology, pharmaceuticals, cosmetics, and industrial cleaning. Its strong decontamination, emulsifying, foaming and protein denaturation capabilities make it an important reagent in laboratories and industries.
Chemical Name: Sodium Dodecyl Sulfate (SDS)
Alternative names: Sodium lauryl sulfate (SLS), Sodium dodecyl sulfate
CAS Number: 151-21-3
Molecular weight: 288.38 g/mol
Appearance: White to light yellow crystalline powder or flaky solid
Solubility: Readily soluble in water, slightly soluble in ethanol, insoluble in non-polar organic solvents (such as ether, chloroform)
pH value (1% aqueous solution) : ~7.0-9.5
Critical micelle concentration (CMC) : ~8.2 mM (25°C)
Main application fields
Biochemistry and Molecular Biology
Protein electrophoresis (SDS-PAGE) : As a denaturant, it depolymerizes proteins and makes them uniformly negatively charged, facilitating separation.
Cell lysis: Destroying the structure of the cell membrane and extracting intracellular contents.
(2) Industry and Daily Chemicals
Detergents and cleaners: Used in laundry powder, shampoo, toothpaste, etc., providing strong decontamination and foaming capabilities.
Emulsifier: Stabilizes the dispersion system in emulsion polymerization (such as synthetic rubber, plastics).
(3) Pharmaceuticals and Cosmetics
Pharmaceutical preparations: As a solubilizer or wetting agent.
Skin care products/shampoo: Foaming and cleansing ingredients (concentration should be controlled to avoid irritation).
|
Parameter |
Specification |
|
Purity |
≥98.5% (Analytical Grade) |
|
Moisture Content |
≤3.0% |
|
Sulfated Ash |
≤0.5% |
|
Heavy Metals (as Pb) |
≤10 ppm |