Chromium(III) nitrate: Difference between revisions

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Updating {{chembox}} (changes to watched fields - added verified revid - updated 'ChemSpiderID_Ref', 'StdInChI_Ref', 'StdInChIKey_Ref', 'ChEMBL_Ref', 'KEGG_Ref') per Chem/Drugbox validation (repo
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{{short description|Chemical compound}}
{{chembox
{{chembox
| Watchedfields = changed
| Watchedfields = changed
| verifiedrevid = 396312153
| verifiedrevid = 440640654
| ImageFile = chromium nitrate.svg
| ImageFile1 = chromium nitrate.svg
| ImageCaption1= Chemical structure of [Cr(H<sub>2</sub>O)<sub>6</sub>](NO<sub>3</sub>)<sub>3</sub>
⚫
| IUPACName = Chromium(III) nitrate
| ImageFile2 = Cr(aq)6(NO3)3(aq)3.jpg
⚫
| OtherNames = Nitric acid, chromium(3+) salt
⚫
| IUPACName = Chromium(III) nitrate
⚫
| Section1 = {{Chembox Identifiers
⚫
| OtherNames = Nitric acid, chromium(3+) salt
⚫
| ChemSpiderID_Ref = {{chemspidercite|correct|chemspider}}
⚫
|Section1={{Chembox Identifiers
⚫
| ChemSpiderID_Ref = {{chemspidercite|correct|chemspider}}
| ChemSpiderID = 15285818
| ChemSpiderID = 15285818
| UNII_Ref = {{fdacite|correct|FDA}}
| UNII_Ref = {{fdacite|correct|FDA}}
| UNII = C6H0RE016B
| UNII = C6H0RE016B
| UNII_Comment = (anhydrous)
| UNII1_Ref = {{fdacite|correct|FDA}}
| UNII1 = D2806IOL1L
| UNII1_Comment = (nonahydrate)
| InChI = 1/Cr.3NO3/c;3*2-1(3)4/q+2;3*-1
| InChI = 1/Cr.3NO3/c;3*2-1(3)4/q+2;3*-1
| SMILES = [Cr+2].O=N([O-])=O.[O-]N(=O)=O.[O-]N(=O)=O
| SMILES = [Cr+2].O=N([O-])=O.[O-]N(=O)=O.[O-]N(=O)=O
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| StdInChIKey = BXWGVGRRIQRLLZ-UHFFFAOYSA-N
| StdInChIKey = BXWGVGRRIQRLLZ-UHFFFAOYSA-N
| CASNo = 13548-38-4
| CASNo = 13548-38-4
| CASNo_Ref = {{cascite|correct|CAS}}
| CASNo_Ref = {{cascite|correct|CAS}}
| CASNo_Comment = (anhydrous)
| CASNo1 = 7789-02-8
| CASNo1_Ref = {{cascite|correct|CAS}}
| CASNo1 = 7789-02-8
| CASNo1_Ref = {{cascite|correct|CAS}}
| CASNo1_Comment = (nonahydrate) <!-- ICSC verified -->
| CASNo1_Comment = (nonahydrate) <!-- ICSC verified -->
| PubChem = 24598
| PubChem = 24598
| RTECS = GB6300000
| RTECS = GB6300000
| UNNumber = 2720
| UNNumber = 2720
}}
}}
| Section2 = {{Chembox Properties
|Section2={{Chembox Properties
| Formula = Cr(NO<sub>3</sub>)<sub>3</sub><br>[Cr(H<sub>2</sub>O)<sub>6</sub>](NO<sub>3</sub>)<sub>3</sub>•3H<sub>2</sub>O (nonahydrate)
| Formula = Cr(NO<sub>3</sub>)<sub>3</sub> (anhydrous)<br>[Cr(H<sub>2</sub>O)<sub>6</sub>](NO<sub>3</sub>)<sub>3</sub>•3H<sub>2</sub>O (nonahydrate)
| MolarMass = 238.011 g/mol (anhydrous) <br> 400.21 g/mol (nonahydrate)
| MolarMass = 238.011 g/mol (anhydrous) <br> 400.21 g/mol (nonahydrate)
| Appearance = Blue-violet crystals (anhydrous)<br>Purple crystals (nonahydrate)
| Appearance = Blue-violet crystals (anhydrous)<br>Purple crystals (nonahydrate)
| Solubility = 81 g/100 mL (20 °C)
| Solubility = 81 g/100 mL (20 °C)
| Density = 1.85 g/cm<sup>3</sup> (nonahydrate)
| Density = 1.85 g/cm<sup>3</sup> (nonahydrate)
| MeltingPtC = 60.06
| MeltingPtC = 60.06
| Melting_notes = nonahydrate
| MeltingPt_notes = nonahydrate
| BoilingPt = > {{convert|100|C|F}} (decomp.)
| BoilingPt= >
| BoilingPtC =100
| BoilingPt_notes =(decomposes)

}}
}}
| Section7 = {{Chembox Hazards
|Section7={{Chembox Hazards
| ExternalMSDS = [http://msds.chem.ox.ac.uk/CH/chromium_III_nitrate_nonahydrate.html Oxford MSDS]
| ExternalSDS = [http://msds.chem.ox.ac.uk/CH/chromium_III_nitrate_nonahydrate.html Oxford MSDS]
⚫
| FlashPt = Non-flammable
| EUIndex = Not listed
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| NFPA-H = 3
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| FlashPt = Non flammable
| NFPA-H = 3
| NFPA-F = 0
| NFPA-F = 0
| NFPA-R = 1
| NFPA-R = 1
| NFPA-S = OX
| LD50 = 3250 mg/kg (rat, oral, nonahydrate)<br />110 mg/kg (mouse, oral)<ref>{{IDLH|cr3m3|Chromium(III) compounds [as Cr(III)]}}</ref>
⚫
| NFPA-O = OX
| LD50 = 3250 mg/kg (rat, oral, nonahydrate)
}}
}}
}}
}}


'''Chromium(III) nitrate''' describes several [[inorganic compound]]s consisting of chromium, nitrate and varying amounts of water. Most common is the dark violet hydrated solid, but an [[anhydrous]] green form is also known. These compounds are not important commercially but are commonly found in academic laboratories.
'''Chromium(III) nitrate''' describes several [[inorganic compound]]s 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.<ref name=Ullmann/> It is common in academic laboratories for the synthesis of chromium [[coordination complex]]es.


==Structure==
==Structure==
The relatively complicated [[chemical formula|formula]] - [Cr(H<sub>2</sub>O)<sub>6</sub>](NO<sub>3</sub>)<sub>3</sub>•3H<sub>2</sub>O - highlights the complicated structure of this material. The chromium centers are bound to six water [[ligand]]s, and the remaining volume of the solid is occupied by three nitrate anions and three [[water of crystallization|molecules of water of crystallization]]. Such complicated formulas typify [[hydrate]]d metal salts.
The relatively complicated [[chemical formula|formula]] - [Cr(H<sub>2</sub>O)<sub>6</sub>](NO<sub>3</sub>)<sub>3</sub>•[[water of crystallization|3H<sub>2</sub>O]] - betray a simple structure of this material. The chromium centers are bound to six [[aquo ligand]]s, and the remaining volume of the solid is occupied by three nitrate anions and three [[water of crystallization|molecules of water of crystallization]].<ref>{{cite journal |doi=10.1107/S0108270190012628|title=Structure of Hexaaquachromium(III) Nitrate Trihydrate|year=1991|last1=Lazar|first1=D.|last2=Ribár|first2=B.|last3=Divjaković|first3=V.|last4=Mészáros|first4=Cs.|journal=Acta Crystallographica Section C Crystal Structure Communications|volume=47|issue=5|pages=1060–1062}}</ref>


==Properties==
==Properties and preparation==
The [[anhydrous]] salt forms green crystals and very soluble in water. At 100 °C it decomposes. The red-violet hydrate is highly soluble in water. Chromium nitrate is used in the production of [[alkali metal]]-free [[catalyst]]s and in [[Pickling (metal)|pickling]].
The [[anhydrous]] salt forms green crystals and is very soluble in water (in contrast to anhydrous [[chromium(III) chloride]] which dissolves very slowly except under special conditions). At 100 °C it decomposes. The red-violet hydrate is highly soluble in water. Chromium nitrate is used in the production of [[alkali metal]]-free [[catalyst]]s and in [[Pickling (metal)|pickling]].


Chromium nitrate can be prepared by dissolving [[chromium oxide]] in [[nitric acid]].<ref name=Ullmann>{{Ullmann|doi=10.1002/14356007.a07_067|title=Chromium Compounds|year=2000|last1=Anger|first1=Gerd|last2=Halstenberg|first2=Jost|last3=Hochgeschwender|first3=Klaus|last4=Scherhag|first4=Christoph|last5=Korallus|first5=Ulrich|last6=Knopf|first6=Herbert|last7=Schmidt|first7=Peter|last8=Ohlinger|first8=Manfred|isbn=3527306730}}</ref>
==Preparation==
Chromium nitrate can be prepared by dissolving [[chromium oxide]] in [[nitric acid]].<ref name=Ullmann>Gerd Anger, Jost Halstenberg, Klaus Hochgeschwender, Christoph Scherhag, Ulrich Korallus, Herbert Knopf, Peter Schmidt, Manfred Ohlinger, "Chromium Compounds" in ''Ullmann's Encyclopedia of Industrial Chemistry'', Wiley-VCH, Weinheim, 2005.</ref>


==References==
==References==
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{{Chromium compounds}}
{{Chromium compounds}}
{{nitrates}}


[[Category:Chromium compounds]]
[[Category:Chromium(III) compounds]]
[[Category:Nitrates]]
[[Category:Nitrates]]
[[Category:Oxidizing agents]]

[[ar:نترات الكروم الثلاثي]]
[[de:Chrom(III)-nitrat]]
[[it:Nitrato di cromo nonaidrato]]
[[nl:Chroom(III)nitraat]]
[[pt:Nitrato de cromo (III)]]
[[zh:硝酸铬]]
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