Rubidium chloride

Rubidium chloride (RbCl) is an inorganic ionic salt composed of rubidium cations and chloride anions. It forms a white, water-soluble crystalline solid.

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Rubidium: Rubidium is a soft, highly reactive alkali metal with atomic number 37. Rubidium atoms lose one electron to form the salt’s positive ions.
Rubidium chloride DNA transformation: A bacterial transformation method that uses rubidium chloride treatment to make cells competent to take up DNA. RbCl is used in some protocols to prepare chemically competent bacteria.
Dissolution: Dissolution is the process by which a solute disperses into a solvent to form a solution. Water separates RbCl ions and surrounds them during dissolving.
Potassium chloride: Potassium chloride (KCl) is an ionic salt composed of potassium cations and chloride anions. KCl shares RbCl’s formula pattern and structure but contains the smaller potassium ion.
Chloride: Chloride is the negatively charged chlorine ion, Cl⁻. Chloride ions balance the positive charge of rubidium ions in RbCl.
Chemical reagent: A chemical reagent is a substance used to cause, detect, or support a chemical reaction or analysis. Laboratory-grade RbCl supplies rubidium ions in chemical and analytical procedures.
Hydration shell: A hydration shell is the organized layer of water molecules surrounding a dissolved ion or molecule. Water molecules stabilize the separated rubidium and chloride ions.
Cesium chloride: Cesium chloride (CsCl) is an ionic salt composed of cesium cations and chloride anions. CsCl illustrates how changing the alkali-metal ion can change a halide’s preferred crystal structure.
Ionic bond: An ionic bond is the electrostatic attraction between oppositely charged ions. This attraction holds rubidium and chloride ions together in the crystal.
Rubidium–strontium dating: Rubidium–strontium dating estimates the ages of rocks and minerals from radioactive rubidium-87 decay to strontium-87. Rubidium chloride can serve as a rubidium source in isotope-analysis workflows.