Rubidium nitrate

Rubidium nitrate
Rubidium nitrate
CAS number 13126-12-0 YesY
PubChem 25731
ChemSpider 23971 YesY
EC number 236-060-1
RTECS number QV0900000
Jmol-3D images Image 1
Molecular formula RbNO3
Molar mass 147.473 g/mol
Appearance White hygroscopic solid
Density 3.11 g/cm3
Melting point

310 °C decomp.

Boiling point

578 °C

Solubility in water 44.28 g/100 mL (16 °C), 65 g/100 mL (25 C)[1]
Refractive index (nD) 1.524
EU Index Not listed
Main hazards Oxidant
NFPA 704
NFPA 704.svg
Flash point Non-flammable
LD50 4625 mg/kg (rat, oral)
Related compounds
Other cations Lithium nitrate
Sodium nitrate
Potassium nitrate
Caesium nitrate
Related compounds Rubidium sulfate
Rubidium chloride
 YesY nitrate (verify) (what is: YesY/N?)
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)
Infobox references

Rubidium nitrate is an inorganic compound with the formula RbNO3. This salt is white and highly soluble in water.



Solubility of rubidium nitrate in water

Rubidium nitrate is a white crystalline powder that is highly soluble in water and very slightly soluble in acetone. In a flame test, RbNO3 gives a mauve/light purple colour.


Rubidium compounds have very few applications.[1] Like caesium nitrate, it is used in infrared radiation producing pyrotechnic compositions as a colorant and an oxidizer, e.g. in decoys and illumination flares. It is also used as a raw material for preparation of other rubidium compounds and rubidium metal, for manufacture of catalysts and in scintillation counters. It finds uncommon use in fireworks to produce a red-violet color.


RbNO3 can be prepared either by dissolving rubidium metal, its hydroxide or carbonate in nitric acid.

RbOH + HNO3 → RbNO3 + H2O
2 Rb + 2 HNO3 → 2 RbNO3 + H2


  1. ^ a b W. Lenk, H. Prinz, A. Steinmetz,"Rubidium and Rubidium Compounds" in Ullmann's Encyclopedia of Industrial Chemistry, 2010 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim. doi:10.1002/14356007.a23_473.pub2

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