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Rubidium Chloride

Updated: 2026-08-02

Overview

Rubidium chloride is an inorganic salt composed of rubidium and chlorine. It occurs as a white crystalline solid that is highly soluble in water. The compound is valued in scientific and industrial applications due to rubidium's unique chemical properties. As one of the most common rubidium compounds, RbCl serves as a starting material for producing other rubidium salts and reagents. Its relatively low cost compared to other rubidium compounds makes it accessible for various research and industrial purposes.

Physical and Chemical Properties

Rubidium chloride exhibits typical properties of alkali metal halides. It has a cubic crystal structure similar to sodium chloride. The compound is hygroscopic, absorbing moisture from air to form hydrates. RbCl has a high melting point of 715°C and boils at 1390°C. In aqueous solutions, it dissociates completely into Rb+ and Cl- ions. The compound shows good solubility in water (77 g/100 mL at 0°C) but only limited solubility in organic solvents like ethanol.

Main Applications

In biochemistry, rubidium chloride is used to study potassium transport mechanisms due to rubidium's similarity to potassium ions. It serves as a tracer in ion channel research. The compound finds applications in spectroscopy as a matrix material for matrix-assisted laser desorption/ionization (MALDI). Industrial uses include its role as a catalyst in certain organic reactions and as a precursor for producing other rubidium compounds.

Safety and Storage

While rubidium chloride has relatively low toxicity compared to other rubidium compounds, proper handling precautions are necessary. Use personal protective equipment including gloves and safety glasses. Store RbCl in airtight containers in a cool, dry place away from moisture. The compound is stable under normal conditions but may react violently with strong oxidizing agents. In case of exposure, flush affected areas with plenty of water.

B2B Procurement Guide

When purchasing rubidium chloride commercially, specify the required purity level which typically ranges from 99% to 99.99%. Higher purity grades command premium prices. Consider packaging options including glass bottles, plastic containers, or bulk packaging depending on your usage scale. Lead times may vary as RbCl is not as commonly stocked as other alkali metal chlorides. Verify supplier certifications and request material safety data sheets.

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