R2252 Sigma-Aldrich

Rubidium chloride

ReagentPlus®, ≥99.0% (metals basis)

Synonym: Rubidium monochloride, Rubidium(I) chloride



Related Categories Chemical Synthesis, Essential Chemicals, Inorganic Salts, Materials Science, Metal and Ceramic Science,
Quality Level   200
product line   ReagentPlus®
assay   ≥99.0% (metals basis)
mp   715 °C (lit.)
solubility   H2O: soluble, clear to slightly hazy
density   2.8 g/mL at 25 °C (lit.)
absorption   ≤0.4 at 280 in H2O at 50%
SMILES string   [Cl-].[Rb+]
InChI   1S/ClH.Rb/h1H;/q;+1/p-1



Rubidium chloride (RbCl) may be used as a non invasive biomarker. RbCl may be used to study the chronotypic effects of Rb in hamsters. A RbCl layer inserted inside an electron transport layer (ETL), tris (8-hydroxyquinoline) aluminum (Alq3) can act as a multilayer organic light-emitting diode (OLED.


5, 10, 50, 100 g in poly bottle

Legal Information

ReagentPlus is a registered trademark of Sigma-Aldrich Co. LLC

Safety & Documentation

Safety Information

Personal Protective Equipment 
NONH for all modes of transport
WGK Germany 
Flash Point(F) 
Not applicable
Flash Point(C) 
Not applicable


Certificate of Analysis (COA)

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Certificate of Origin (COO)

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Frequently Asked Questions

Which document(s) contains shelf-life or expiration date information for a given product?
If available for a given product, the recommended re-test date or the expiration date can be found on the Certificate of Analysis.
How do I get lot-specific information or a Certificate of Analysis?
The lot specific COA document can be found by entering the lot number above under the "Documents" section.
What is Rubidium Chloride, Product R2252,soluble in?
This product is soluble in water (100 mg/ml), yielding a clear to slightly hazy, colorless to very faint yellow solution. Also, per the chemicals encyclopedia published by the Royal Society of Chemistry, 13th Edition, 1 gram will dissolve in 90ml of Methanol or 1650ml of Ethanol.
How is Rubidium Chloride, Product R2252, used in the area of Material Science?
Rubidium Chloride has been used to prepare molecular nanowires as potential precursors of nanoscale devices. (Akutagawa, T., et al., Formation of oriented molecular nanowires on mica surface. Proc. Natl. Acad. Sci. USA, 99(8), 5028-5033 (2002).)
Do I need to be aware of anything when handling Rubidium Chloride, Product R2252?
Yes, Rubidium Chloride is hygroscopic and will absorb water. This should be taken into account when handling and storing this compounds. Flushing the head space of the bottle with Nitrogen and storing it in a dessicator will help to keep the material from absorbing moisture.
How is Product R2252, Rubidium Chloride made?
There are many techniques and methods for Rubidium Chloride - here a few: One way to make rubidium chloride is to react the hydroxide with hydrochloric acid. The resulting salt can then be purified by recrystallization.RbOH(aq) + HCl(aq)-> RbCl(aq) + H2O(l)Rubidium(I) bromide can also be made by the neutralization of rubidium(I) carbonate with hydrobromic acid. The resulting salt can then be purified by recrystallization.Rb2(CO3)(aq) + 2HBr(aq)-> 2RbBr(aq) + H2O(l) + CO2(g)While not a normal route of preparation because of the expense, rubidium metal reacts vigorously with all the halogens to form rubidium halides. So, it burns with chlorine, Cl2, to form rubidium(I) chloride, RbCl.2Rb(s) + Cl2(g)-> 2RbCl(s)
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What is the Department of Transportation shipping information for this product?
Transportation information can be found in Section 14 of the product's (M)SDS.To access the shipping information for this material, use the link on the product detail page for the product.
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