Caesium nitrate

Caesium nitrate Identifiers InChI InChI=1/Cs.NO3/c;2-1(3)4/q+1;-1 InChIKey NLSCHDZTHVNDCP-UHFFFAOYAE Standard InChI InChI=1/Cs.NO3/c;2-1(3)4/q+1;-1 Standard InChIKey NLSCHDZTHVNDCP-UHFFFAOYSA-N CAS number [7789-18-6] EC number 232-146-8 UN number 1451 ChemSpider 56425 Properties Chemical formula CsNO3 Molar mass 194.91 g/mol Appearance white solid Density 3.685 g/cm3 Melting point 414 ºC Boiling point decomp., see text Solubility in water 9.16 g/100 ml (0 ºC) 196.8 g/100 ml (100 ºC) Solubility in acetone soluble Solubility in ethanol slightly soluble Hazards EU index number not listed GHS pictograms GHS signal word WARNING GHS hazard statements H272 GHS precautionary statements P210, P220, P221, P280, P370+378, P501 Flash point non-flammable Related compounds Other anions Caesium nitrite Other cations Lithium nitrate Sodium nitrate Potassium nitrate Rubidium nitrate Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)

Caesium nitrate—nitric acid (1/1) Identifiers InChI InChI=1/Cs.HNO3.NO3/c;2*2-1(3)4/h;(H,2,3,4);/q+1;;-1 Properties Chemical formula CsNO3·HNO3 Molar mass 257.92 g/mol Melting point 100 ºC Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)

Caesium nitrate—nitric acid (1/2) Identifiers InChI InChI=1/Cs.2HNO3.NO3/c;3*2-1(3)4/h;2*(H,2,3,4);/q+1;;;-1 Properties Chemical formula CsNO3·2HNO3 Molar mass 320.92 g/mol Melting point 32–36 ºC Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)

Caesium nitrate is a chemical compound with the chemical formula CsNO₃. It is used in pyrotechnic compositions, as a colorant and an oxidizer, e.g. in decoys and illumination flares. The caesium emissions are chiefly due to two powerful spectral lines at 852.113 nm and 894.347 nm.

Caesium nitrate prisms are used in infrared spectroscopy, in x-ray phosphors, and in scintillation counters. It is also used in making optical glasses and lenses.

As with other alkali metal nitrates, caesium nitrate decomposes on heating to give caesium nitrite:

CsNO₃ → CsNO₂ + ½O₂

Caesium also forms two unusual acid nitrates, which can be described as CsNO₃·HNO₃ and CsNO₃·2HNO₃ (melting points 100 ºC and 36–38 ºC respectively).

External links

• Cesium Compounds: Nuclear Power Plant Emissions