Rubidium nitrate

Rubidium nitrate
	Unit cell of rubidium nitrate
Names
	IUPAC name Rubidium nitrate
Identifiers
CAS Number	13126-12-0 ;
3D model (JSmol)	Interactive image;
ChemSpider	23971 ;
ECHA InfoCard	100.032.767
EC Number	236-060-1;
PubChem CID	25731;
RTECS number	QV0900000;
CompTox Dashboard (EPA)	DTXSID30884577 ;
	InChI InChI=1S/NO3.Rb/c2-1(3)4;/q-1;+1 Key: RTHYXYOJKHGZJT-UHFFFAOYSA-N ; InChI=1S/NO3.Rb/c2-1(3)4;/q-1;+1 Key: RTHYXYOJKHGZJT-UHFFFAOYAE; Key: RTHYXYOJKHGZJT-UHFFFAOYSA-N;
	SMILES [Rb+].[O-][N+]([O-])=O;
Properties
Chemical formula	RbNO3
Molar mass	147.473 g/mol
Appearance	White hygroscopic solid
Density	3.11 g/cm3
Melting point	310 °C (590 °F; 583 K) decomposes
Boiling point	578 °C (1,072 °F; 851 K)
Solubility in water	44.28 g/100 mL (16 °C); 65.0 g/100 mL (25 °C)
Solubility in acetone	very slightly soluble
Magnetic susceptibility (χ)	−41.0·10−6 cm3/mol
Refractive index (nD)	1.524
Structure
Crystal structure	trigonal
Space group	P31
Lattice constant	a = 10.474 Å, c = 7.443 Å
Lattice volume (V)	707.2 Å3
Hazards
	Occupational safety and health (OHS/OSH):
Main hazards	Oxidant
	GHS labelling:
Pictograms
Signal word	Danger
Hazard statements	H272, H315, H319, H335
Precautionary statements	P210, P220, P261, P264, P264+P265, P271, P280, P302+P352, P304+P340, P305+P351+P338, P319, P321, P332+P317, P337+P317, P362+P364, P370+P378, P403+P233, P405, P501
NFPA 704 (fire diamond)	1 0 0 OX
Flash point	Non-flammable
	Lethal dose or concentration (LD, LC):
LD50 (median dose)	4625 mg/kg (rat, oral)
Related compounds
Other anions	Rubidium sulfate; Rubidium chloride
Other cations	Lithium nitrate; Sodium nitrate; Potassium nitrate; Caesium nitrate
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). verify (what is ?) Infobox references

Rubidium nitrate is an inorganic compound with the formula RbNO₃. This alkali metal nitrate salt is a white hygroscopic solid that is highly soluble in water.

Properties

In a flame test, RbNO₃ gives a mauve/light purple colour.

Production

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

RbOH + HNO₃ → RbNO₃ + H₂O

Rb₂CO₃ + 2 HNO₃ → 2 RbNO₃ + CO₂ + H₂O

2 Rb + 2 HNO₃ → 2 RbNO₃ + H₂

Uses

Rubidium compounds have very few applications.^[1] Like caesium nitrate, it is used in infrared radiation optics, in pyrotechnic compositions as a pyrotechnic colorant and as an oxidizer, e.g. in decoys and illumination flares although it is rarely used in fireworks to produce a red-violet colour. 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.

References

^ ^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
^ Jutta Pohl, Dieter Pohl, Gunadi Adiwidjaja (1992). "Phase Transition in Rubidium Nitrate at 346 K and Structure at 296, 372, 413 and 437 K". Acta Crystallographica Section B. B48 (2): 160–166. doi:10.1107/S0108768191013459.{{cite journal}}: CS1 maint: multiple names: authors list (link)
^ PubChem. "Rubidium nitrate". pubchem.ncbi.nlm.nih.gov. Retrieved 2026-01-19.

[Ullmann-1] 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

[2] Jutta Pohl, Dieter Pohl, Gunadi Adiwidjaja (1992). "Phase Transition in Rubidium Nitrate at 346 K and Structure at 296, 372, 413 and 437 K". Acta Crystallographica Section B. B48 (2): 160–166. doi:10.1107/S0108768191013459.{{cite journal}}: CS1 maint: multiple names: authors list (link)

[3] PubChem. "Rubidium nitrate". pubchem.ncbi.nlm.nih.gov. Retrieved 2026-01-19.

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