Sodium Dodecyl Sulfate
Sodium dodecyl sulfate (SDS) is a white or cream-colored crystalline powder with a faint odor. It is soluble in water and alcohol
but insoluble in ether. The compound has a molecular weight of 288.38 g/mol and a melting point of 204°C. SDS
is known for its excellent foaming and detergent properties, making it a common ingredient in cleaning and personal care products.
It has a critical micelle concentration (CMC) of approximately 8.2 mM at 25°C, which allows it to effectively lower surface tension
and form micelles, crucial for its role in solubilizing hydrophobic compounds.
Product name |
Sodium dodecyl sulfate |
Synonyms |
Lauryl sulfate sodium salt |
CAS No. |
151-21-3 |
EINECS |
205-788-1 |
Molecular formula |
C12H25NaO4S |
Molecular weight |
288.38 |
Specifications |
Appearance |
White crystalline flakes |
Melting point |
204-207 °C(lit.) |
Flashing point |
>100°C |
Density |
1.03 g/mL at 20 °C |
Assay |
99% |
Application:
Sodium lauryl sulfate (SLS) is a widely used surfactant with numerous applications across various industries. In personal care
products, it is a key ingredient in shampoos, toothpastes, and soaps due to its ability to create a rich lather and effectively remove
oils and dirt. SLS is also utilized in household cleaning products, such as laundry detergents and dishwashing liquids, for its strong
cleansing and foaming properties. Additionally, it finds use in industrial settings for cleaning and degreasing purposes. In the
pharmaceutical industry, SLS acts as an emulsifying and dispersing agent in topical preparations and oral medications. Despite
its widespread use, SLS is often scrutinized for potential skin irritation, leading to ongoing research into safer alternatives.
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