Chromium(III) nitrate

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Chromium(III) nitrate

Chemical structure of [Cr(H2O)6](NO3)3
Names
IUPAC name
Chromium(III) nitrate
Other names
Nitric acid, chromium(3+) salt
Identifiers
3D model (
JSmol
)
ChemSpider
ECHA InfoCard
 100.033.550 Edit this at Wikidata
RTECS number
  • GB6300000
UNII
UN number 2720
  • InChI=1S/Cr.3NO3/c;3*2-1(3)4/q+2;3*-1 checkY
    Key: BXWGVGRRIQRLLZ-UHFFFAOYSA-N checkY
  • InChI=1/Cr.3NO3/c;3*2-1(3)4/q+2;3*-1
    Key: BXWGVGRRIQRLLZ-UHFFFAOYAO
  • [Cr+2].O=N([O-])=O.[O-]N(=O)=O.[O-]N(=O)=O
Properties
Cr(NO3)3 (anhydrous)
[Cr(H2O)6](NO3)3•3H2O (nonahydrate)
Molar mass 238.011 g/mol (anhydrous)
400.21 g/mol (nonahydrate)
Appearance Blue-violet crystals (anhydrous)
Purple crystals (nonahydrate)
Density 1.85 g/cm3 (nonahydrate)
Melting point 60.06 °C (140.11 °F; 333.21 K) nonahydrate
Boiling point > 100 °C (212 °F; 373 K) (decomposes)
81 g/100 mL (20 °C)
Hazards
NFPA 704 (fire diamond)
NFPA 704 four-colored diamondHealth 3: Short exposure could cause serious temporary or residual injury. E.g. chlorine gasFlammability 0: Will not burn. E.g. waterInstability 1: Normally stable, but can become unstable at elevated temperatures and pressures. E.g. calciumSpecial hazard OX: Oxidizer. E.g. potassium perchlorate
3
0
1
OX
Flash point Non-flammable
Lethal dose or concentration (LD, LC):
3250 mg/kg (rat, oral, nonahydrate)
110 mg/kg (mouse, oral)[1]
Safety data sheet (SDS) Oxford MSDS
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
checkY verify (what is checkY☒N ?)

Chromium(III) nitrate describes several inorganic compounds consisting of chromium, nitrate and varying amounts of water. Most common is the dark violet hygroscopic solid. An anhydrous green form is also known. Chromium(III) nitrate compounds are of a limited commercial importance, finding some applications in the dyeing industry.[2] It is common in academic laboratories for the synthesis of chromium coordination complexes.

Structure

The relatively complicated

aquo ligands, and the remaining volume of the solid is occupied by three nitrate anions and three molecules of water of crystallization.[3]

Properties and preparation

The

catalysts and in pickling
.

Chromium nitrate can be prepared by dissolving chromium oxide in nitric acid.[2]

References

  1. ^ "Chromium(III) compounds [as Cr(III)]". Immediately Dangerous to Life or Health Concentrations (IDLH). National Institute for Occupational Safety and Health (NIOSH).
  2. ^
    ISBN 978-3527306732
    .
  3. doi:10.1107/S0108270190012628
    .
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