Sodium Dodecyl Sulfate
2001; Linguagem: Inglês
10.1002/047084289x.rs069
Autores Tópico(s)Molecular Sensors and Ion Detection
Resumo[151-21-3] C12H25NaO4S (MW 288.38) InChI = 1S/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 InChIKey = DBMJMQXJHONAFJ-UHFFFAOYSA-M (used in surfactant-based reaction media) Alternate Names: SDS; sodium lauryl sulfate; SLS. Physical Data: mp 204–207 °C. Solubility: sol H2O; insol Et2O; critical micelle concentration (CMC) in H2O (25 °C) = 8.1 mM.1 Form Supplied in: colorless or white solid. Analysis of Reagent Purity: commercially available sodium dodecyl sulfate generally contains 1-dodecanol,2 which yields a minimum at the CMC in plots of surface tension vs. concentration. The presence of 1-dodecanol can be detected by an HPLC method.3 Impurities can also include surfactant homologs and electrolytes,2 which yield low surface tension values above the CMC. Preparative Methods: by sulfation of 1-dodecanol with Sulfur Trioxide, followed by neutralization of the resultant dodecylsulfuric acid with Sodium Hydroxide.4 Purification: recrystallization from H2O and EtOH.5 Handling, Storage, and Precautions: harmful if inhaled or swallowed and is irritating to the eyes and skin; should be stored under nitrogen.2b
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