Inorganic Salts

Ionic gradient media, comprised of concentrated heavy metal salts, are almost exclusively used for isopycnic separations of nucleic acids. Cesium chloride and cesium sulfate are the most widely used heavy metal salts with gradient densities of up to 1.91 g/cm3 . Other useful salts include sodium iodide, sodium bromide and the rubidium salts. The steepness and shape of the ionic and non-viscous with high osmolarities. It should be kept in mind that the density of the sample is highly dependent on the sample’s hydration, which in turn depends on the dehydration power of the ionic gradient media.

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C3139 Cesium chloride optical grade, ≥99.5% trace metals basis
C3011 Cesium chloride Grade I, ≥99.0%
C3032 Cesium chloride for molecular biology, ≥99% (silver nitrate titration)
C4036 Cesium chloride for molecular biology, ≥98%
C3309 Cesium chloride BioXtra, ≥99.5% (titration)
C6914 Cesium chloride Grade II, ≥98%
20966 Cesium chloride BioUltra, for molecular biology, ≥99.5% (AT)
C3136 Cesium sulfate Grade I, ≥99%
213233 Lithium chloride ReagentPlus®, 99%
P0838 Potassium bromide BioXtra, ≥99.0%
P9881 Potassium bromide ReagentPlus®, ≥99.0%
60089 Potassium bromide BioUltra, ≥99.5% (AT)
71913 Sodium polytungstate purum p.a., for the preparation of heavy liquid, for sink-float analysis, ≥85% WO3 basis