10025-93-1

Basic information

• Product Name: Uranium(III) chloride.
• Synonyms: Uranium(III) chloride.;URANIUMTRICHLORIDE;Uran(III) trichloride
• CAS NO: 10025-93-1
• Molecular Formula: Cl₃U
• Molecular Weight: 344.39
• Mol File: 10025-93-1.mol
• Article Data: 10

Chemical Properties

• Melting Point: 842°
• Appearance: /green hygroscopic crystals
• Density: 5.51
• Water Solubility: very soluble H2O, evolves H2, solution changes color from purple to green due to oxidation of U+++ [MER06]
• CAS DataBase Reference: Uranium(III) chloride.(CAS DataBase Reference)
• NIST Chemistry Reference: Uranium(III) chloride.(10025-93-1)
• EPA Substance Registry System: Uranium(III) chloride.(10025-93-1)

Safety Data

• RIDADR: 2912
• HazardClass: 7
• Hazardous Substances Data: 10025-93-1(Hazardous Substances Data)

Usage

Description

Uranium(III) chloride, also known as uranous chloride, is a dark purple crystalline compound that exhibits hygroscopic properties. It is synthesized by reacting uranium hydride (UH3) with hydrochloric acid (HCl) at temperatures ranging from 250°C to 300°C. Uranium(III) chloride. is known for its role in the refining of uranium metal through the use of molten salt electrolytes.

Uses

Used in Nuclear Industry:
Uranium(III) chloride is used as a starting material for the production of uranium metal. It is essential in the nuclear industry, where uranium metal is a critical component in the fabrication of nuclear fuel for power generation.
Used in Chemical Research:
As a compound with unique chemical properties, Uranium(III) chloride is utilized in various chemical research applications. It serves as a precursor for the synthesis of other uranium compounds and is used in the study of uranium chemistry and its potential applications in various fields.
Used in Molten Salt Electrolytes:
Uranium(III) chloride is used as a component in molten salt electrolytes, which are crucial for the electrochemical refining of uranium metal. This process is vital for the production of high-purity uranium, which is necessary for various applications, including nuclear fuel production and research.

InChI:InChI=1/3ClH.U/h3*1H;/q;;;+3/p-3

Synthetic route

uranium(IV) chloride (10026-10-5) → uranium(III) chloride (10025-93-1)

Conditions	Yield
With zinc redn. of UCl4 by metallic Zn at 450 to 480°C in vacuum;;	86%
In neat (no solvent) on sublimation of UCl4, in part dissocn. and forming of UCl3 (not volatile ppte.);;
With H redn. by hydrogen; using of absolutely pure H;;

Hg(b),Li(1) (X%) + 2Li(1+)*[(UCl4(C4H8O))2((CH3)2CO)2](2-)*99C4H8O=Li2[(UCl4(C4H8O))2((CH3)2CO)2]*99C4H8O → uranium(III) chloride (10025-93-1) + Li(UCl4) + 2Li(1+)*[UCl4(OC(CH3)2)2](2-)*99C4H8O=Li2[UCl4(OC(CH3)2)2]*99C4H8O

Conditions	Yield
In tetrahydrofuran Ar atm; 1 equiv. of amalgam, 20°C, 4.5 h;	A n/a B n/a C 85%

benzocyclooctene (265-49-6) + uranium(IV) chloride (10026-10-5) → uranium(III) chloride (10025-93-1) + dibenzouranocene (87532-97-6)

Conditions	Yield
With potassium In tetrahydrofuran under Ar; to a soln. of benzocyclooctatetraene potassium was added; mixt. stirred for 48 h, added to a soln. of UCl4 and refluxed for 2 days; evapn., washing a residue with hexane, extn. (THF);	A n/a B 20%

potassium (7440-09-7) + uranium(IV) chloride (10026-10-5) → uranium(III) chloride (10025-93-1) + K2UCl5

Conditions	Yield
In neat (no solvent) at 700°C for 7 days;

uranium + uranium(IV) chloride (10026-10-5) → uranium(III) chloride (10025-93-1)

Conditions	Yield
in evacuated quartz tube at 1130 K for 1 h;;
In neat (no solvent, solid phase) at 800°C for 7 d;
In neat (no solvent) fused in evacuated ampule at 860-870°C for 1 h; slowly cooled, elem. anal.;
In neat (no solvent) 400°C, several h; heating (615°C);

silver (7440-22-4) + uranium(IV) chloride (10026-10-5) → uranium(III) chloride (10025-93-1) + silver(I) chloride

Conditions	Yield
In not given equilibrium;
In not given equilibrium;

potassium 6,6-dimethylcyclohexadienide (82360-21-2) + uranium(IV) chloride (10026-10-5) → uranium(III) chloride (10025-93-1) + (6,6-dimethylcyclohexadienyl)2

Conditions	Yield
In tetrahydrofuran under Ar; evapn. of solvent, extn. (pentane), pentane evapd. off: (Me2C6H5)2;

hydrogenchloride (7647-01-0) + uranium(III) hydride → uranium(III) chloride (10025-93-1)

Conditions	Yield
In neat (no solvent) at 250-300°C;;
In neat (no solvent) at 250-300°C;;

uranium + silver(I) chloride → uranium(III) chloride (10025-93-1)

Conditions	Yield
In neat (no solvent) byproducts: Ag; Ar atmosphere; heating (sealed tantalum crucible, 1172-1223 K); sublimation;

uranyl chloride → uranium(III) chloride (10025-93-1)

Conditions	Yield
With zinc In hydrogenchloride on redn. of UO2Cl2 by Zn;; not isolated;;
With Zn In hydrogenchloride on redn. of UO2Cl2 by Zn;; not isolated;;

uranium(IV) chloride (10026-10-5) + lithium (7439-93-2) → uranium(III) chloride (10025-93-1)

Conditions	Yield
In neat (no solvent, solid phase) byproducts: LiCl; at 700°C for 7 d;

uranium → uranium(III) chloride (10025-93-1)

Conditions	Yield
With H2; HCl In neat (no solvent) hydriding of metal (470 K), conversion to trichloride with gaseouc HCl (470 K); sublimation (ca. 1170 K);

uranium + cadmium(II) chloride (10108-64-2) → uranium(III) chloride (10025-93-1)

Conditions	Yield
In melt byproducts: Cd; formation in LiCl-NaCl-CaCl2-BaCl2 melt (455°C, 30 min); not isolated;
With LiCl; KCl In melt (Ar); in glove box; prepd. in LiCl-KCl melt at 773 K; ref.: D. S. Poa, Z. Tomczuk, R. K. Steunenberg. J. Electrochem. Soc.,135, 1161(1988);

hydrogenchloride (7647-01-0) + uranium → uranium(III) chloride (10025-93-1)

Conditions	Yield
With H2 In neat (no solvent) hydriding metal with H2 at 473 K, converting it to UCl3 with HCl at 473 K; subliming under high vacuum at 1173 K;

hydrogenchloride (7647-01-0) + uranium + hydrogen (1333-74-0) → uranium(III) chloride (10025-93-1) + uranium(IV) chloride (10026-10-5)

Conditions	Yield
U reacted with hydrogen at 250°C to yield UH3, whichis dehydrogeated at 330°C in a stream of dry Ar, the obtained powder reacted with HCl gas at 250°C;

disulfur dichloride (10025-67-9) + uranium oxide → uranium(III) chloride (10025-93-1)

Conditions	Yield
on heating U3O8 in mixture with S2Cl2 vapor and S in excess;;	0%
on heating U3O8 in mixture with S2Cl2 vapor and S in excess;;	0%

hydrogenchloride (7647-01-0) + uranium(VI) trioxide → uranium(III) chloride (10025-93-1)

Conditions	Yield
In hydrogenchloride Electrolysis; electrolysis of a soln. of UO3 in HCl (d: 1.12, 15%) in a stream of CO2 with diaphragma and Hg cathode (110V, 1.5 up to 2 A); liquid at anode: HCl (d: 1.12); when react. soln. is getting green brown colored: 0.75 up to 1A, further electrolysis untill; react. soln. is getting red colored; redn.;;
In hydrogenchloride Electrolysis; electrolysis of a soln. of UO3 in HCl (d: 1.12, 15%) in a stream of CO2 with diaphragma and Hg cathode (110V, 1.5 up to 2 A); liquid at anode: HCl (d: 1.12); when react. soln. is getting green brown colored: 0.75 up to 1A, further electrolysis untill; react. soln. is getting red colored; redn.;;

Hg(b),Li(1) (X%) + uranium(IV) chloride (10026-10-5) → uranium(III) chloride (10025-93-1)

Conditions	Yield
In not given Ar atm.;

hydrogenchloride (7647-01-0) + uranium(III) hydride → uranium(III) chloride (10025-93-1) + uranium(IV) chloride (10026-10-5)

Conditions	Yield
In not given react. at 523K, distn. of UCl4 at 813K;

ammonium tetrachlorouranate(III) tetrahydrate → uranium(III) chloride (10025-93-1)

Conditions	Yield
In neat (no solvent) non-static high vac. system:heating slowly from 20-300 ° C, 1E-5 - 1E-7 Pa;
With NH4Cl In neat (no solvent) moisture- and oxygen-free conditions, thermal high vac. decompn., in a sealed quartz tube, 1.5-fold excess of NH4Cl, pumped off to ca. 1E-6 Pa, 25-80°C for 7 h, temp. slowly raised to 400°C; elem. anal.;

uranium(III) hydride → uranium(III) chloride (10025-93-1) + uranium(IV) chloride (10026-10-5)

Conditions	Yield
With hydrogenchloride uranium hydride heating with HCl forms UCl3 and UCl4 at 623-673 K; treated the sample with purified H2 at 600 to 793 the UCl4 impurity was converted into UCl3; treated the sample with purified H2 at 600 to 793 K the UCl4 impurity was converted into UCl3; characterized by X-ray diffraction and elem. anal.;

U(AlCl4)3(C6H6) → uranium(III) chloride (10025-93-1)

Conditions	Yield
In tetrahydrofuran byproducts: AlCl3, benzene; decompn. in THF soln.;
In tetrahydrofuran byproducts: AlCl3, benzene; decompn. in THF soln.;

ammonium tetrachlorouranate(III) trihydrate → uranium(III) chloride (10025-93-1)

Conditions	Yield
In neat (no solvent) in non-static vac. (1-10*0.000001 kPa), temp. increasing from 20 to 300°C;

uranium trichloride heptahydrate → uranium(III) chloride (10025-93-1)

Conditions	Yield
byproducts: water; heating the UCl3*7H2O dimer in a non-static high vacuum system at 25, 60 and 100°C, final heat treatment at about 200°C; IR spectroscopy;

calcium monochloride (15606-71-0) + uranium dichloride (13775-08-1) → uranium(III) chloride (10025-93-1)

Conditions	Yield
In gas byproducts: Ca(g); 1967 - 2181 K; mass spectrometry;

uranium trichloride dihydrate → uranium(III) chloride (10025-93-1)

Conditions	Yield
In neat (no solvent) byproducts: water; 600 - 700 K, vac.;

uranium trichloride trihydrate → uranium(III) chloride (10025-93-1)

Conditions	Yield
In neat (no solvent) byproducts: water; 600 - 700 K, vac.;

uranium trichloride tetrahydrate → uranium(III) chloride (10025-93-1)

Conditions	Yield
In neat (no solvent) byproducts: water; 600 - 700 K, vac.;

uranium trichloride heptahydrate → uranium(III) chloride (10025-93-1)

Conditions	Yield
In neat (no solvent) byproducts: water; 600 - 700 K, vac.;

uranium(III) chloride (10025-93-1) + trifluorormethanesulfonic acid (1493-13-6) → uranium(IV) trifluoromethanesulfonate

Conditions	Yield
In neat (no solvent) Ar atmosphere, 180°C (3 d); distillation of TfOH, drying (150°C, vacuum, 60 h);	100%

uranium(III) chloride (10025-93-1) + trifluorormethanesulfonic acid (1493-13-6) → uranium(III) triflate

Conditions	Yield
In neat (no solvent) Ar atmosphere, 120°C (3 d); distillation of TfOH, drying (120°C, vacuum, 30 h); elem. anal.;	96%

uranium(III) chloride (10025-93-1) + sodium methylcyclopentadienide → tris(methylcyclopentadienyl)uranium(III)*THF

Conditions	Yield
In tetrahydrofuran byproducts: NaCl; (N2); stirring for 6 h; removal of solvent (reduced pressure); warming to 50-60°C for 1.5 h (reduced pressure); extn. of solid (diethyl ether); filtration and concn. of ext.; cooling to -80°C; elem. anal.;	50%

tetrahydrofuran (109-99-9) + uranium(III) chloride (10025-93-1) + 1-indene (95-13-6) → (C9H7)3U*THF

Conditions	Yield
With potassium In tetrahydrofuran glovebox, under N2 or Ar: addn. of potassium (69.5mmol) to a dry and degassed THF soln. of indene and further addn. of a stoichiometric amt. of UCl3 when react. was complete, stirring of mixture at room temp. for 4d at room temp.;; on removal of solvent in vacuo and extraction of the brown residue with pentane for 8 days; elem. anal.;;	35%

uranium(III) chloride (10025-93-1) + sodium methylcyclopentadienide → (η5-MeC5H4)3U(tetrahydrofuran) (78869-46-2)

Conditions	Yield
In tetrahydrofuran crystn. (hexane/THF);	33%

uranium(III) chloride (10025-93-1) + potassium cyclopentadiene → triscyclopentadienyluranium III

Conditions	Yield
In benzene refluxing for 7 d, drying; extn. with benzene;	10%

uranium(III) chloride (10025-93-1) + cesium chloride + sodium chloride (7647-14-5) → 2Cs(1+)*Na(1+)*UCl6(3-) = Cs2NaUCl6

Conditions	Yield
In neat (no solvent) a well ground stoichiometric mixture of CsCl, NaCl and UCl3 sealed in a quartz tube under vacuum; the mixture next heated at 400°C for 3 days;
In melt fusion of stoichiometric amts. of UCl3, CsCl and NaCl at 1073 - 1173 K in sealed tube;
In melt melting a mixt. of CsCl, NaCl and UCl3 at 1050 K for 1 h (Ar) under periodic stirring in evacuated quartz capsules;

uranium(III) chloride (10025-93-1) + cesium chloride + sodium chloride (7647-14-5) → Cs2NaUCl6

Conditions	Yield
In neat (no solvent) heating (high vacuum, quartz tube, 1070-1170 K);

uranium(III) chloride (10025-93-1) + nickel (7440-02-0) → Ni(33),U(b) (A%)

Conditions	Yield
In melt Electrolysis; electrolysis of molten CaCl2, BaF2 or BaCl2 with UCl3 at 900-1050 °C, (0.4-5A, current density: 0.1-1 A/cm*cm), Ni cathode, U anode);; the alloy is dropping from the cathode to the bottom;;
In melt Electrolysis; electrolysis of molten CaCl2, BaF2 or BaCl2 with UCl3 at 900-1050 °C, (0.4-5A, current density: 0.1-1 A/cm*cm), Ni cathode, U anode);; the alloy is dropping from the cathode to the bottom;;

uranium(III) chloride (10025-93-1) + hydrogen fluoride (7664-39-3) → uranium(IV) tetrafluoride (10049-14-6)

Conditions	Yield
byproducts: HCl, H2; 450°C; anhydrous HF;

uranium(III) chloride (10025-93-1) → (x)H2O*(x)O2U

Conditions	Yield
With water In water byproducts: H; dissolving of UCl3 in H2O, purple react. soln., immediately evolving of H, changing to green colored, then forming of ppte. of uranium(IV)hydroxide (probably);;
With H2O In water byproducts: H; dissolving of UCl3 in H2O, purple react. soln., immediately evolving of H, changing to green colored, then forming of ppte. of uranium(IV)hydroxide (probably);;

uranium(III) chloride (10025-93-1) → uranium(III) hydroxide

Conditions	Yield
With ammonia In hydrogenchloride
With NH3 In hydrogenchloride

uranium(III) chloride (10025-93-1) → uranium(4+)

Conditions	Yield
With H3PO4 or H2C2O4 In hydrogenchloride pptg. of U(IV)salts;;
With H3PO4 or H2C2O4 In hydrogenchloride pptg. of U(IV)salts;;

Upstream product

• 7440-09-7 potassium 
• 10026-10-5 uranium(IV) chloride 
• 7647-01-0 hydrogenchloride 
• 7439-93-2 lithium 
• 10108-64-2 cadmium(II) chloride 
• 1333-74-0 hydrogen 
• 15606-71-0 calcium monochloride 
• 13775-08-1 uranium dichloride 
• 265-49-6 benzocyclooctene 
• 10025-67-9 disulfur dichloride 
• 82360-21-2 potassium 6,6-dimethylcyclohexadienide 
• 7440-22-4 silver 

Downstream Products

• 10049-14-6 uranium(IV) tetrafluoride 
• 16089-60-4 uranium⁽⁴⁺⁾ 
• 117097-69-5 ({8}annulene)uranium(IV) dichloride 
• 10026-10-5 uranium(IV) chloride 
• 7783-81-5 uranium hexafluoride 
• 137528-43-9 {OC(C₆H₅)2C(C₆H₅)2O}UCl₂ 

Relevant articles and documents

Catalytic Activity of UIII towards Hydrogenation of Olefins

It has been shown that UCl3 in tetrahydrofuran can catalyse the hydrogenation of olefins by LiH or LiAlH4 according to a mechanism involving two hydrogen atoms of the hydride.

Cyclohexadienyl uranium complexes

The potassium salt of the 6,6-dimethylcyclohexadienyl anion, (dmch)K, reacted with U(BH4)4 (I) to give (dmch)2U(BH4)2 (II), whereas (dmch)U(BH4)3 (III) was obtained from an equimolecular mixture of II and I.The anionic compounds K(18-crown-6)

Metallopinacolate Intermediates in the Reductive Coupling of Acetone Promoted by Uranium Reagents

-

Thermochemical studies of the gaseous uranium chlorides

The gaseous uranium halides UCl, UCl2, UCl3, UCl4, and UCl5 were generated under equilibrium conditions using several types of effusive beam sources, and were identified and characterized thermochemically by mass spectrometry.Five independent gaseous equi

Preparation and characterization of potassium, rubidium and ammonium tetrachlorouranate (III) trihydrates

The synthesis and characterization of a new series of hydrated uranium(III) complex chlorides of the general formula MIUCl4·3H2O (MI ≡ K, Rb or NH4) are reported. The compounds crystallize in the monoclinic system. Unit cell parameters were determined from X-ray powder diffraction data. The magnetic susceptibilities of the complex chlorides were measured by the Faraday method in the 4.2-300 K range. The compounds exhibit Curie-Weiss paramagnetism in the 100-300 K range, with the derived effective magnetic moments ranging from 3.57μB to 3.71μB. Solid state electronic and IR spectra were recorded in the 4000-30 000 and 80-4000 cm-1 ranges, respectively and discussed. Non-static high vacuum thermal dehydrations enabled us to obtain the anhydrous compounds KUCl4, RbUCl4 and UCl3.