Rubidium nitrate

Rubidium nitrate
IUPAC name Rubidium nitrate
Identifiers
CAS number	13126-12-0 Y
PubChem	25731
ChemSpider	23971 Y
EC number	236-060-1
RTECS number	QV0900000
Jmol-3D images	Image 1
SMILES [Rb+].[O-][N+]([O-])=O
InChI InChI=1S/NO3.Rb/c2-1(3)4;/q-1;+1 Y Key: RTHYXYOJKHGZJT-UHFFFAOYSA-N Y
Properties
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)
Refractive index (nD)	1.524
Hazards
EU Index	Not listed
Main hazards	Oxidant
NFPA 704	0 1 0 OX
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
Y (verify) (what is: Y/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.

Properties

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.

Uses

Rubidium compounds have very few applications. 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.

Production

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