Ammonium lauryl sulfate
Ammonium lauryl sulfate (ALS) is the common name for ammonium dodecyl sulfate (CH3(CH2)10CH2OSO3NH4). The anion consists of a nonpolar hydrocarbon chain and a polar sulfate end group. The combination of nonpolar and polar groups confers surfactant properties to the anion: it facilitates dissolution of both polar and non-polar materials. This salt is classified as a sulfate ester. It is made from coconut or palm kernel oil for use primarily in shampoos and body-wash as a foaming agent. Lauryl sulfates are very high-foam surfactants that disrupt the surface tension of water in part by forming micelles at the surface-air interface.
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IUPAC name
Ammonium dodecyl sulfate | |
Other names
• monododecyl ester, ammonium salt • Ammonium dodecyl sulfate | |
Identifiers | |
3D model (JSmol) |
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ChemSpider | |
ECHA InfoCard | 100.017.086 |
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CompTox Dashboard (EPA) |
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Properties | |
C12H29NO4S | |
Molar mass | 283.43 g/mol |
Appearance | yellowish viscous liquid |
Density | 1.02 g/cm3 |
Boiling point | 418 °C (784 °F; 691 K) |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references |
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