Strontium nitrate

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Strontium nitrate
Strontium nitrate.png
Identifiers
CAS number 10042-76-9 YesY
PubChem 24848
ChemSpider 23231 YesY
UNII BDG873AQZL YesY
EC number 233-131-9
Jmol-3D images Image 1
Properties
Molecular 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:
71 g/100 mL (18 °C)
66 g/100 mL (20 °C)
tetrahydrate:
60.43 g/100 mL (0 °C)
206.5 g/100 mL (100 °C)
Solubility soluble in ammonia
very slightly soluble in ethanol, acetone
insoluble in nitric acid
Structure
Crystal structure cubic (anhydrous)
monoclinic (tetrahydrate)
Hazards
EU Index Not listed
Main hazards Irritant
Flash point Non-flammable
LD50 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 noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
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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[edit]

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[edit]

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[edit]

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.

References[edit]

  1. ^ Pradyot Patnaik. Handbook of Inorganic Chemicals. McGraw-Hill, 2002, 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. ^ J. Paul MacMillan, Jai Won Park, Rolf Gerstenberg, Heinz Wagner, Karl Köhler, Peter Wallbrecht "Strontium and Strontium Compounds" in Ullmann's Encyclopedia of Industrial Chemistry, Wiley-VCH, Weinheim, 2002. doi:10.1002/14356007.a25_321
  4. ^ Zhai, H; Hannon, Hahn, Pelosi, Harper, Maibach (2000). "Strontium nitrate suppresses chemically-induced sensory irritation in humans". Contact dermatitis 11 (2): 98–100. PMID 10703633. 
Salts and the ester of the Nitrate ion
HNO3 He
LiNO3 Be(NO3)2 B(NO3)4- RONO2 NO3-
NH4NO3
O FNO3 Ne
NaNO3 Mg(NO3)2 Al(NO3)3 Si P S ClONO2 Ar
KNO3 Ca(NO3)2 Sc(NO3)3 Ti(NO3)4 VO(NO3)3 Cr(NO3)3 Mn(NO3)2 Fe(NO3)3 Co(NO3)2,
Co(NO3)3
Ni(NO3)2 Cu(NO3)2 Zn(NO3)2 Ga(NO3)3 Ge As Se Br Kr
RbNO3 Sr(NO3)2 Y Zr(NO3)4 Nb Mo Tc Ru Rh Pd(NO3)2 AgNO3 Cd(NO3)2 In Sn Sb Te I XeFNO3
CsNO3 Ba(NO3)2   Hf Ta W Re Os Ir Pt Au Hg2(NO3)2,
Hg(NO3)2
Tl(NO3)3 Pb(NO3)2 Bi(NO3)3 Po At Rn
Fr Ra   Rf Db Sg Bh Hs Mt Ds Rg Cn Uut Fl Uup Lv Uus Uuo
La Ce(NO3)x Pr Nd Pm Sm Eu Gd Tb Dy Ho Er Tm Yb Lu
Ac Th Pa UO2(NO3)2 Np Pu Am Cm Bk Cf Es Fm Md No Lr