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Ceric ammonium nitrate

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Ceric ammonium nitrate Basic information
Ceric ammonium nitrate Chemical Properties
  • Melting point:107-108 °C
  • Boiling point:83°C
  • Density 1.10 g/mL at 20 °C
  • vapor density 2.3 (vs air)
  • vapor pressure 6.4 kPa (@ 20°C)
  • storage temp. Store at +5°C to +30°C.
  • solubility 919-1020g/l
  • form Powder/Solid
  • Specific Gravity1.045
  • color Yellow to orange
  • PH0.61 (111.11g/l, H2O, 20℃)
  • OdorSlight characteristic odor
  • Odor Threshold0.29 ppm
  • Water Solubility 1410 G/L (20 ºC)
  • Merck 14,1992
  • Stability:Stable. Oxidizer - contact with combustible material may cause fire. Incompatible with strong reducing agents, combustible material.
  • InChIKeyWIBGOERAEYJBOT-UHFFFAOYSA-N
  • CAS DataBase Reference16774-21-3(CAS DataBase Reference)
  • EPA Substance Registry SystemCerate(2-), hexakis(nitrato-.kappa.O)-, diammonium, (OC-6-11)- (16774-21-3)
Safety Information
  • Hazard Codes Xi,O,Xn
  • Risk Statements 8-36/37/38-36/38-41-22
  • Safety Statements 26-36-17-37/39
  • RIDADR UN 1477 5.1/PG 2
  • WGK Germany 3
  • 8
  • TSCA Yes
  • HS Code 3822 00 00
  • HazardClass 5.1
  • PackingGroup III
  • ToxicityLD50 orally in Rabbit: > 300 - 2000 mg/kg
MSDS
Ceric ammonium nitrate Usage And Synthesis
  • Chemical Propertiesyellow-orange crystals
  • Physical propertiesReddish-orange monoclinic crystals; very soluble in water.
  • UsesCeric ammonium nitrate is used as a volumetric oxidizing reagent in many oxidation-reduction titrations. Cerium(IV) ion is a strong oxidant similar to permanganate ion. It is the most widely-used primary standard among all Ce(IV) compounds. Other applications of this compound are in organic oxidation reactions; and as a catalyst in polymerization of olefins.
  • UsesUsed as oxidimetric standard.
  • UsesA strongly oxidizing cerium preparation
  • PreparationCeric ammonium nitrate is prepared by electrolytic oxidation of cerous nitrate in nitric acid to ceric nitrate, followed by the addition of ammonium nitrate solution. It is separated from the solution by crystallization. It may be prepared alternatively by dissolving cerium(II) oxide, CeO•H2O in concentrated nitric acid followed by treatment with ammonium nitrate.
  • ReactionsThe most important reactions of Ceric ammonium nitrate are the oxidations, attributed to Ce4+ ion in the solution. The standard reduction potential E° for the formal half-reaction: Ce4+ + e– Ce3+ in 1 M H2SO4 is 1.44 V. The oxidizing strength is comparable to permanganate (MnO4- ), bromate (BrO3-), and dichromate (Cr2O72-) anions. Analytical applications involve reactions with reductants such as sodium oxalate (Na2C2O4) or arsenic (III) oxide (As2O3) in the presence of iron, with ferroin (1,10–phenanthroline iron(II) complex) as the indicator.
  • HazardCeric ammonium nitrate is a powerful oxidizing agent. Precautions should be taken to avoid accidental contacts with orgnaic or other readily oxidizable substances.
  • Purification MethodsCeric ammonium nitrate (125g) is warmed with 100mL of dilute HNO3 (1:3 v/v) and 40g of NH4NO3 until it dissolves, and filtered through a sintered-glass funnel. The solid which separates on cooling in ice is filtered off on a sintered funnel (at the pump) and air is sucked through the solid for 1-2 hours to remove most of the nitric acid. Finally, the solid is dried at 80-85o.
Ceric ammonium nitrate Preparation Products And Raw materials
Ceric ammonium nitrate(16774-21-3)Related Product Information
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