Chromium(III) nitrate

Nonahydrate
Chemical structure of [Cr(H2O)6](NO3)3
Names
IUPAC name Chromium(III) nitrate
Other names Nitric acid, chromium(3+) salt
Identifiers
CAS Number	13548-38-4 (anhydrous) Y 7789-02-8 (nonahydrate) Y
3D model (JSmol)	Interactive image
ChemSpider	15285818 Y
ECHA InfoCard	100.033.550
PubChemCID	24598
RTECS number	GB6300000
UNII	C6H0RE016B (anhydrous) Y D2806IOL1L (nonahydrate) Y
UN number	2720
CompTox Dashboard(EPA)	DTXSID8065531
InChI InChI=1S/Cr.3NO3/c;3*2-1(3)4/q+2;3*-1 Y Key: BXWGVGRRIQRLLZ-UHFFFAOYSA-N Y InChI=1/Cr.3NO3/c;3*2-1(3)4/q+2;3*-1 Key: BXWGVGRRIQRLLZ-UHFFFAOYAO
SMILES [Cr+3].O=N([O-])=O.[O-]N(=O)=O.[O-]N(=O)=O
Properties
Chemical formula	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)
Solubility in water	81 g/100 mL (20 °C)
Hazards
NFPA 704 (fire diamond)	3 0 1 OX
Flash point	Non-flammable
Lethal dose or concentration (LD, LC):
LD50 (median dose)	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 theirstandard state (at 25 °C [77 °F], 100 kPa). Y verify (what is YN ?) Infobox references

Chromium(III) nitrate describes severalinorganic compounds consisting of chromium, nitrate and varying amounts of water. Most common is the dark violet hygroscopic solid. Ananhydrous 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 chromiumcoordination complexes.

The relatively complicatedformula - [Cr(H₂O)₆](NO₃)₃•3H₂O - betray a simple structure of this material. The chromium centers are bound to sixaquo ligands, and the remaining volume of the solid is occupied by three nitrate anions and threemolecules of water of crystallization.^[3]

Theanhydrous salt forms green crystals and is very soluble in water (in contrast to anhydrouschromium(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 ofalkali metal-freecatalysts and inpickling.

Chromium nitrate can be prepared by dissolvingchromium oxide innitric acid.^[2]

• Chromium(III) compounds
• Nitrates

• Articles with short description
• Short description matches Wikidata
• Chemical articles with multiple compound IDs
• Multiple chemicals in an infobox that need indexing
• Chemical articles with multiple CAS registry numbers
• Articles without EBI source
• Articles without KEGG source
• ECHA InfoCard ID from Wikidata
• Articles containing unverified chemical infoboxes