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  • Sodium dodecyl sulfate
  • Sodium dodecyl sulfate
  • Sodium dodecyl sulfate

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Sodium dodecyl sulfate

Sodium dodecyl sulfate

Basic Information

CAS No.: 151-21-3
Molecular Formula: C12H25NaO4S
Molecular Weight: 289.39

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Product Details

Sodium dodecyl sulfate is an anionic surfactant with outstanding foaming, emulsifying, decontaminating and dispersing performance. It features high purity, stable quality and excellent hard water resistance. Widely used in personal care, detergents, industrial cleaning, emulsions and chemical synthesis as a foaming agent, emulsifier and detergent.


Chemical Properties

PropertyValue
Melting point204-207 °C (lit.)
Bulk density490-560 kg/m³
Density1.03 g/mL at 20 °C
FEMA4437 | SODIUM LAURYL SULFATE
Flash point>100°C
Storage condition2-8°C
SolubilityH₂O: 0.1 M, clear to nearly clear, colorless to slightly yellow
FormPowder or crystals
ColorWhite to pale yellow
OdorSlight fatty odor
pH value6-9 (10 g/l, H₂O, 20°C)
pH range (indicator)7.2
Biological sourceSynthetic (organic)
Water solubilityca. 150 g/L (20 °C)
Wavelength maximum (λ_max)λ: 260 nm, Amax: 0.3
λ: 280 nm, Amax: 0.2
Merck14,8636
BRN3599286
Cosmetic ingredient functionCLEANSING SURFACTANT - CLEANSING DENATURANT FOAMING
InChI15/C12H26O4S.Na/c1-2-3-4-5-6-7-8-9-10-11-12-16-17(13,14)15;/h2-12H2,1H3,(H,13,14,15);/q;+1/p-1
InChIKeyDBMJMQXJHONAFJ-UHFFFAOYSA-M
LogP1.600
CAS database151-21-3 (CAS DataBase Reference)
EPA chemical substance informationSodium lauryl sulfate (151-21-3)
Absorption≤0.1 at 280 nm in water at 30 mg/mL


Safety Information

PropertyValue
Hazard symbolsF, Xn, Xi
Hazard class codes36/37/38-36/38-22-11-21/22-42-41-20/21/22-37/38
Safety descriptions26-36/37-36/37/39-36-22-39
UN dangerous goods numberUN 2926 4.1/PG 2
WGK Germany2
RTECS numberWT1050000
F3
TSCATSCA listed
Hazard class4.1
Packing groupIII
HS code29209010
Storage class11 - Combustible solids
Hazard class (category)Acute toxicity, Category 4, Oral
Hazardous to the aquatic environment — long-term hazard, Category 3
Serious eye damage, Category 1
Skin irritation, Category 2
Hazardous substances data151-21-3 (Hazardous Substances Data)
ToxicityLD50 orally in rats: 1288 mg/kg (Walker)


Product Usage:
SDS is a highly effective anionic surfactant and emulsifier, widely used across various industries:

Personal Care & Cosmetics: Shampoos, body washes, toothpaste, shaving creams, and bubble baths (as a primary foaming agent, degreaser, and emulsifier).

Household Cleaning: Laundry detergents, dishwashing liquids, all-purpose cleaners, and stain removers (for its excellent grease-cutting and foaming properties).

Industrial Applications: Emulsion polymerization (for producing latex, PVC, and acrylics), metal cleaning, textile processing (wetting and degreasing agent), and agricultural emulsifiers.

Laboratory & Biochemical Research: Cell lysis buffer, protein solubilization (e.g., in SDS-PAGE for protein separation), DNA extraction, and membrane protein studies.

Pharmaceuticals: As an excipient in tablet coatings and liquid formulations to enhance solubility and absorption.


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