Strontium nitrate

Strontium nitrate

Names
IUPAC name Strontium nitrate
Identifiers
CAS Number	10042-76-9 Y
3D model (Jmol)	Interactive image
ChemSpider	23231 Y
ECHA InfoCard	100.030.107
EC Number	233-131-9
PubChem	24848
UNII	BDG873AQZL Y
InChI InChI=1S/2NO3.Sr/c2*2-1(3)4;/q2*-1;+2 Y Key: DHEQXMRUPNDRPG-UHFFFAOYSA-N Y InChI=1/2NO3.Sr/c2*2-1(3)4;/q2*-1;+2 Key: DHEQXMRUPNDRPG-UHFFFAOYAG
SMILES [Sr+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O
Properties
Chemical formula	Sr(NO3)2
Molar mass	211.630 g/mol (anhydrous) 283.69 g/mol (tetrahydrate)
Appearance	white granular solid
Density	2.986 g/cm3 (anhydrous) 2.20 g/cm3 (tetrahydrate)[1]
Melting point	570 °C (1,058 °F; 843 K) (anhydrous) 100 °C, decomposes (tetrahydrate)
Boiling point	645 °C (1,193 °F; 918 K) decomposes
Solubility in water	anhydrous: 710 g/L (18 °C) 660 g/L (20 °C) tetrahydrate: 604.3 g/L (0 °C) 2065 g/L (100 °C)
Solubility	soluble in ammonia very slightly soluble in ethanol, acetone insoluble in nitric acid
Structure
Crystal structure	cubic (anhydrous) monoclinic (tetrahydrate)
Hazards
Main hazards	Irritant
Flash point	Non-flammable
Lethal dose or concentration (LD, LC):
LD50 (median dose)	2750 mg/kg (rat, oral)
Related compounds
Other anions	Strontium sulfate Strontium chloride
Other cations	Beryllium nitrate Magnesium nitrate Calcium nitrate Barium nitrate
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
N verify (what is YN ?)
Infobox references

Strontium nitrate is an inorganic compound with the formula Sr(NO₃)₂. This colourless solid is used as a colorant (red) in pyrotechnics and is also used as an oxidizer in pyrotechnics.

Preparation

Strontium nitrate is typically generated by the reaction of nitric acid on strontium carbonate.^[2]

2 HNO₃ + SrCO₃ → Sr(NO₃)₂ + H₂O + CO₂

The reaction of nitric acid and strontium carbonate to form strontium nitrate

.

Uses

Like many other strontium salts, strontium nitrate is used to produce a rich red flame in fireworks and road flares. The oxidizing properties of this salt are advantageous in such applications.^[3]

Strontium nitrate can aid in eliminating and lessening skin irritations. When mixed with glycolic acid, strontium nitrate reduces the sensation of skin irritation significantly better than using glycolic acid alone.^[4]

Biochemistry

As a divalent ion with an ionic radius similar to that of Ca²⁺ (1.13 vs. 0.99 A, respectively), Sr²⁺ ions resembles calcium's ability to traverse calcium-selective ion channels and trigger neurotransmitter release from nerve endings. It is thus used in electrophysiology experiments.

Popular Culture

In his short story "A Germ Destroyer," Rudyard Kipling refers to strontium nitrate as the main ingredient of the titular fumigant

References

1. ↑ Patnaik, Pradyot (2002). Handbook of Inorganic Chemicals. McGraw-Hill, ISBN 0-07-049439-8
2. ↑ Ward, R.; Osterheld, R. K.; Rosenstein, R. D. (1950). "Strontium Sulfide and Selenide Phosphors". Inorg. Synth. Inorganic Syntheses. 3: 11–23. doi:10.1002/9780470132340.ch4. ISBN 978-0-470-13234-0. 
3. ↑ MacMillan, J. Paul; Park, Jai Won; Gerstenberg, Rolf; Wagner, Heinz; Köhler, Karl and Wallbrecht, Peter (2002) "Strontium and Strontium Compounds" in Ullmann's Encyclopedia of Industrial Chemistry, Wiley-VCH, Weinheim. doi:10.1002/14356007.a25_321
4. ↑ Zhai H, Hannon W, Hahn GS, Pelosi A, Harper RA, Maibach HI (2000). "Strontium nitrate suppresses chemically-induced sensory irritation in humans". Contact dermatitis. 11 (2): 98–100. doi:10.1034/j.1600-0536.2000.042002098.x. PMID 10703633.