In cesium chloride purification protocols, this step is performed iteratively until the sample is no longer pink.  
Miller, Dykes, and Polesky developed a cheaper "salting-out" alternative to this process, while Chelex and FTA paper are more recent alternatives.  Impurities generated by this process can lead to artificially inflated 260/280 ratios in spectrophotometric quantification.  In cesium chloride purification protocols, this step is performed iteratively until the sample is no longer pink.  The reagent used for this process may be used at a pH of 4.7 or 7.9, depending on whether the sample contains RNA or DNA, and it is usually followed by ethanol or isopropanol precipitation.  For 10 points, name this technique used to purify nucleic acids by transferring contaminating proteins and lipids into an organic phase consisting in part of hydroxylated benzene.
Miller, Dykes, and Polesky developed a cheaper "salting-out" alternative to this process, while Chelex and FTA paper are more recent alternatives.  
phenol-chloroform extraction [prompt on extraction or phenol extraction, accept TRIzol extraction or PCIA extraction or phenol-chloroform-isoamyl alcohol extraction, accept organic extraction before the word "organic"]