sodium lauryl sulfate
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Definition
Noun: A synthetic organic compound, specifically an anionic surfactant, commonly used as a detergent and foaming agent. It is a powerful cleanser effective at removing oil and grease. While widely used in personal care and cleaning products, it can be irritating to skin and mucous membranes and is harmful if ingested.
Usage
- Sodium lauryl sulfate is a primary ingredient in many shampoos and body washes for its lathering properties.
- It functions as a surfactant, lowering the surface tension of water to allow it to mix with oils and dirt so they can be rinsed away.
- Due to its potential for irritation, it is sometimes avoided in products formulated for sensitive skin.
Examples
Advanced Usage
- In Chemistry: Often abbreviated as SLS. Its chemical formula is CH₃(CH₂)₁₁OSO₃Na. It is the sodium salt of lauryl sulfate.
- In Product Labeling: Frequently listed on ingredient labels as Sodium Lauryl Sulfate or SLS. A closely related compound, sodium laureth sulfate (SLES), is often used for similar purposes but is generally considered less irritating.
Variants and Related Words
- Sodium Laureth Sulfate (SLES) (n): A related surfactant that undergoes an ethoxylation process, often used as a milder alternative to SLS in personal care products.
- Surfactant (n): A broader category of compounds that lower surface tension, encompassing detergents, emulsifiers, and foaming agents like SLS.
- Detergent (n): A cleansing agent. SLS is a specific type of synthetic detergent.
Synonyms
- Sodium dodecyl sulfate (SDS): This is the more precise chemical name for the same compound, commonly used in scientific and industrial contexts.
- Anionic surfactant: Describes its functional class; it carries a negative charge when dissolved in water.
Notes on Safety and Context
- While effective, sodium lauryl sulfate is known to be a skin irritant and can strip natural oils from the skin and hair.
- It is considered safe for use in rinse-off products like shampoo and shower gel but should not be swallowed, as it can cause gastrointestinal distress.
- The compound is also used in non-personal care applications, such as in industrial cleaners, car wash soaps, and as a reagent in scientific laboratories for protein denaturation in electrophoresis.
Noun
- a caustic detergent useful for removing grease; although commonly included in personal care items (shampoos and toothpastes etc.) it can irritate skin and should not be swallowed