13569-75-0

Basic information

• Product Name: CHROMIUM (IC) IODIDE
• Synonyms: CHROMIUM IODIDE;CHROMIUM (III) IODIDE;CHROMIUM (IC) IODIDE;chromium triiodide;Chromium(IV)iodide99.5%;Chromium iodide(CrI3);Chromium(III) triiodide;Einecs 236-991-3
• CAS NO: 13569-75-0
• Molecular Formula: CrI₃
• Molecular Weight: 432.71
• EINECS: 236-991-3
• Mol File: 13569-75-0.mol

Chemical Properties

• Melting Point: >600°C
• Boiling Point: °Cat760mmHg
• Flash Point: °C
• Appearance: /dark green hexagonal crystals
• Density: 4.915
• CAS DataBase Reference: CHROMIUM (IC) IODIDE(CAS DataBase Reference)
• NIST Chemistry Reference: CHROMIUM (IC) IODIDE(13569-75-0)
• EPA Substance Registry System: CHROMIUM (IC) IODIDE(13569-75-0)

Safety Data

• Hazardous Substances Data: 13569-75-0(Hazardous Substances Data)

Usage

Chemical Properties

black crystal(s); -60 mesh with 99.5% purity [CER91] [CRC10]

InChI:InChI=1/Cr.3HI/h;3*1H/q+3;;;/p-3

Synthetic route

chromium (7440-47-3) → chromium(III) iodide (13569-75-0)

Conditions	Yield
With iodine
With iodine

chromium (7440-47-3) + hydrogen iodide (10034-85-2) → chromium(II) iodide + chromium(III) iodide (13569-75-0)

Conditions	Yield
In water byproducts: H2; Cr dissolves at room temp. in aq. HI at concns. 2.2-2.4 Mol/l; at elevated temps. the concn. may be 1.70-2.00 Mol/l; the products CrI2 and CrI3 form an equilibrium.; no products isolated;;
min. concn. of HI for dissolution of Cr in cold and warm given;
min. concn. of HI for dissolution of Cr in cold and warm given;
In water byproducts: H2; Cr dissolves at room temp. in aq. HI at concns. 2.2-2.4 Mol/l; at elevated temps. the concn. may be 1.70-2.00 Mol/l; the products CrI2 and CrI3 form an equilibrium.; no products isolated;;

chromium(III) sulphide + aluminium(III) iodide (7784-23-8) → chromium(III) iodide (13569-75-0)

Conditions	Yield
In neat (no solvent) byproducts: Al2S3; react. at 350 °C. 48 h;; extraction with H2O;;
In neat (no solvent) byproducts: Al2S3; react. at 350 °C. 48 h;; extraction with H2O;;

chromium (7440-47-3) + iodine (7553-56-2) → chromium(III) iodide (13569-75-0)

Conditions	Yield
In neat (no solvent) enclosing Cr and I2 under high vac. in a sublimation tube; heating Cr up to 475 °C; react. with I2 vapor (formed by heating I2 up to 225 °C), 24h;;
In neat (no solvent) enclosing Cr and I2 under high vac. in a sublimation tube; heating Cr up to 475 °C; react. with I2 vapor (formed by heating I2 up to 225 °C), 24h;;
In neat (no solvent) react. of gaseous I2 (in carrier gas N2) with Cr at 1200 °C;;
In neat (no solvent, solid phase) High Pressure; Cr and I2 were heated for 12 h in sealed, evaculated tube at 170-450°C;

chromium(II) iodide + iodine (7553-56-2) → chromium(III) iodide (13569-75-0)

Conditions	Yield
In neat (no solvent) react. of CrI2 with I2 vapor (1 atm) at 500 °C;;
In neat (no solvent) react. of CrI2 with I2 vapor (1 atm) at 500 °C;;

potassium iodochromat(VI) + hydrogen iodide (10034-85-2) → chromium(III) iodide (13569-75-0) + iodine (7553-56-2)

Conditions	Yield
In water byproducts: KI; decompn. by boiling HI soln.;;
In water byproducts: KI; decompn. by boiling HI soln.;;

4Cr(3+)*2H(1+)*7SO4(2-)=Cr4H2(SO4)7 + hydrogen iodide (10034-85-2) → chromium(III) iodide (13569-75-0)

Conditions	Yield
In further solvent(s) byproducts: H2S, H2O, I2; boiling with HI soln.;;
In further solvent(s) byproducts: H2S, H2O, I2; boiling with HI soln.;;

tris(η3-allyl)chromium (27303-69-1) → chromium(III) iodide (13569-75-0)

Conditions	Yield
With I2 In tetrahydrofuran byproducts: C3H5I;	>99

chromium(II) iodide + hydrogen iodide (10034-85-2) → chromium(III) iodide (13569-75-0)

Conditions	Yield
In not given byproducts: H2; equilibrium;;
In not given byproducts: H2; equilibrium;;

hydrogen iodide (10034-85-2) + chromium(III) chloride (10025-73-7) → chromium(III) iodide (13569-75-0)

Conditions	Yield
In further solvent(s) react. of CrCl3 and concd. HI soln. (D=1.70);; not isolated;;
In further solvent(s) react. of CrCl3 and concd. HI soln. (D=1.70);; not isolated;;

lead(II) chromate + hydrogen iodide (10034-85-2) → chromium(III) iodide (13569-75-0)

Conditions	Yield
In water excess HI soln.;;

3Li(1+)*Cr(CH3)6(3-)*3(C4H8O2)=Li3Cr(CH3)6*3(C4H8O2) → chromium(III) iodide (13569-75-0) + lithium iodide * 2 dioxane

Conditions	Yield
With iodine byproducts: CH3I; quant.;

3Li(1+)*Cr(CH3)6(3-)*3(C4H8O2)=Li3Cr(CH3)6*3(C4H8O2) → chromium(III) iodide (13569-75-0) + Li(1+)*I3(1-)=LiI3

Conditions	Yield
With iodine byproducts: CH3I; quant.;
With iodine byproducts: CH3I; quant.;

2Na(1+)*Cr(3+)*5C6H5(1-)*3(C2H5)2O=Na2Cr(C6H5)5*3(C2H5)2O → iodobenzene (591-50-4) + biphenyl (92-52-4) + chromium(III) iodide (13569-75-0)

Conditions	Yield
With iodine byproducts: NaI;
With I2 byproducts: NaI;

Li(1+)*{Cr(C6H4OCH3)4}(1-)*(C2H5)2O=Li{Cr(C6H4OCH3)4}*(C2H5)2O → chromium(III) iodide (13569-75-0)

Conditions	Yield
With I2 byproducts: LiI, o-IC6H4OCH3;

(C6H5)6CrLi3*2.5 diethylether → biphenyl (92-52-4) + chromium(III) iodide (13569-75-0)

Conditions	Yield
With I2 byproducts: C6H5I, LiI;

Li2Cr2(C6H5)6* 3 diethylether → chromium(III) iodide (13569-75-0)

Conditions	Yield
With I2 byproducts: LiI, NaI, biphenyl;

chromium(II) iodide + chromium(III) iodide (13569-75-0) → chromium (7440-47-3)

Conditions	Yield
1000-1400°C, E-3-760 torr;
1000-1400°C, E-3-760 torr;

chromium(III) iodide (13569-75-0) → chromium (7440-47-3)

Conditions	Yield
heating in air-tight sealed crucible at 800-1000°C;
byproducts: iodine; thermal dissocn. in a sealed, evacuated quartz vessel at 800°C; Cr pptd. to Cr wire streching out between two Ni-electrodes at 1100°C;
With D-Fructose; hydrogen iodide; boric acid In not given Electrolysis; 100 g/l Cr; 25 g/l boric acid; 2.5 g/l HI; 20°C; 5V; interelectrode distance 5 cm; 10 A/dm**2;

chromium(II) iodide + chromium(III) iodide (13569-75-0) → chromium(I) iodide

Conditions	Yield
In neat (no solvent) thermal decompn. at 400-700 °C;;
In neat (no solvent) thermal decompn. at 400-700 °C;;

lithium nitride + chromium(III) iodide (13569-75-0) → dichromium nitride

Conditions	Yield
In neat (no solvent, solid phase) CrI3 was reacted with Li3N in steel reactor; washed with water, filtered;

chromium(III) iodide (13569-75-0) → chromium(II) iodide

Conditions	Yield
In neat (no solvent) byproducts: I2; dissociation at 490-664 °C to gaseous I2 and CrI2;;
In neat (no solvent) thermal decompn. at 500 °C under vac.;; sublimation at 700 °C in vac.;;
With H2 In neat (no solvent) redn. in a stream of H2 at 300-350 °C;;

chromium(III) iodide (13569-75-0) + ammonia (7664-41-7) → diiodoethoxotriamminechromium(III)

Conditions	Yield
With diethyl ether In diethyl ether passing dry NH3 into a soln. of chromium(III) iodide in ether;;
With ether In diethyl ether passing dry NH3 into a soln. of chromium(III) iodide in ether;;

chromium(III) iodide (13569-75-0) + (3-methyl-4.5.6.7-tetrahydro-indenyl)MgBr → (3-methyl-4.5.6.7-tetrahydro-indenyl)2CrI

Conditions	Yield
In diethyl ether
In diethyl ether

lithium nitride + chromium(III) iodide (13569-75-0) + ammonium chloride → dichromium nitride + chromium nitride

Conditions	Yield
In neat (no solvent, solid phase) CrI3 was reacted with Li3N and NH4Cl in steel reactor; washed with water, filtered;

chromium(III) iodide (13569-75-0) + rubidium chloride + chromium (7440-47-3) + rubidium iodide → Rb2CrClI3

Conditions	Yield
In neat (no solvent) resublimed Rb-halogenides and CrI3 (from the elements in an evacuated quartz tube at 500°C) are sealed (together with Cr) in an evacuated quartz tube, heating at 600°C for 48 h; filtn. at 600°C through a quartz filter (to remove excess Cr),cooling, grounding to powder, remelting, quenching to room temp., chemical analysis, desired product could not be isolated;	0%

chromium(III) iodide (13569-75-0) + silver picrate (146-84-9) → chromium(III) picrate (148940-98-1)

Conditions	Yield
In water reaction of CrI3 and Ag picrate in an aq. soln.; recrystn. from methanol, molecular weight detn.;	85-90

chromium(III) iodide (13569-75-0) + phenyl pyruvic acid thiosemicarbazone (81118-79-8) → {Cr(phenylpyruvic acid thiosemicarbazone-H)2}I

Conditions	Yield
In ethanol hot ethanolic solns. mixed together, refluxed on a water-bath for about 4 h; cooled, filtered, washed with ethanol, dried (electric oven, 60°C); elem. anal.;

chromium(III) iodide (13569-75-0) + phenyl pyruvic acid semicarbazone (81118-82-3) → {Cr(phenylpyruvic acid semicarbazone-H)2}I

Conditions	Yield
In ethanol hot ethanolic solns. mixed together, refluxed on a water-bath for about 4 h; cooled, filtered, washed with ethanol, dried (electric oven, 60°C); elem. anal.;

chromium(III) iodide (13569-75-0) + (4-methylphenyl)pyruvic acid thiosemicarbazone (81118-81-2) → {Cr((4-methylphenyl)pyruvic acid thiosemicarbazone-H)2}I

Conditions	Yield
In ethanol hot ethanolic solns. mixed together, refluxed on a water-bath for about 4 h; cooled, filtered, washed with ethanol, dried (electric oven, 60°C); elem. anal.;

Upstream product

• 7440-47-3 chromium 
• 10034-85-2 hydrogen iodide 
• 7553-56-2 iodine 
• 27303-69-1 tris(η3-allyl)chromium 
• 10025-73-7 chromium(III) chloride 
• 7784-23-8 aluminium(III) iodide 

Downstream Products

• 7440-47-3 chromium 
• 148940-98-1 chromium(III) picrate 

Relevant articles and documents

Rapid solid-state synthesis of tantalum, chromium, and molybdenum nitrides

Solid-state metathesis (exchange) reactions can be used to synthesize many different transition-metal nitrides under ambient conditions including TiN, ZrN, and NbN. Typical metathesis reactions reach temperatures of greater than 1300 °C in a fraction of a second to produce these refractory materials in highly crystalline form. Likely due to the large amount of heat produced in these solid-state reactions, some transition-metal nitrides such as TaN, CrN, and γ-Mo2N cannot easily be synthesized under ambient conditions. Here metathesis reactions are demonstrated to produce the cubic nitrides TaN, CrN, and γ-Mo2N when sufficient pressure is applied before the reaction is initiated. By pressing a pellet of TaCl5 and Li3N with an embedded iron wire, crystalline cubic TaN forms under 45 kbar of pressure after a small current is used to initiate the chemical reaction. Crystalline cubic CrN is synthesized from CrCl3 and Li3N initiated under 49 kbar of pressure. Crystalline γ-Mo2N is produced from MoCl5 and Ca3N2 (since MOCl5 and Li3N self-detonate) initiated under 57 kbar of pressure. The addition of ammonium chloride to these metathesis reactions drastically lowers the pressure requirements for the synthesis of these cubic nitrides. For example, when 3 mol of NH4Cl is added to CrCl3 and Li3N, crystalline CrN forms when the reaction is initiated with a resistively heated wire under ambient conditions. Cubic γ-Mo2N also forms at ambient pressure when 3 mol of NH4Cl is added to the reactants MoCl5 and Ca3N2 and ignited with a resistively heated wire. A potential advantage of synthesizing γ-Mo2N under ambient conditions is the possibility of forming high-surface-area materials, which could prove useful for catalysis. Nitrogen adsorption (BET) indicates a surface area of up to 30 m2/g using a Langmuir model for γ-Mo2N produced by a metathesis reaction at ambient pressure. The enhanced surface area is confirmed using scanning electron microscopy.