Chromium supplier | CasNO.7440-47-3

Name
Chromium
EINECS 231-157-5
CAS No. 7440-47-3
Article Data422
CAS DataBase
Density 7.20℃
Solubility Insoluble in water
Melting Point 1890 ºC
Formula Cr
Boiling Point 2200 ºC
Molecular Weight 51.996
Flash Point 50 °F
Transport Information
Appearance silver-gray solid
Safety Confirmed human carcinogen with experimental tumorigenic data. Powder will explode spontaneously in air. Ignites and is potentially explosive in atmospheres of carbon dioxide. Violent or explosive reaction when heated with ammonium nitrate. May ignite or react violently with bromine pentafluoride. Incandescent reaction with nitrogen oxide or sulfur dioxide. Incompatible with oxidants. See also CHROMIUM COMPOUNDS.
Analytical Methods:

For occupational chemical analysis use OSHA: #ID-125G or NIOSH: Chromium, 7024; Welding and Brazing Fume, 7200; Elements, 7300.
Risk Codes R40
Molecular Structure
Hazard Symbols
Synonyms Alpaste RRA030; Alpaste RRA 050; Chrome; Chromium element
PSA 0.00000
LogP 0.00000

Synthetic route

: chromium(III) oxide

: 7440-47-3
chromium

Conditions

Conditions	Yield
With acetylen soot redn. at 1120°C;	100%
With acetylen soot redn. at 1120°C;	100%
With calcium carbide; potassium chloride byproducts: K2CrO4; forming vapour of K at 600°C; reaction temp. ca 400°C; K2CrO4 dissolving with water; purity: 99.5-99.8% Cr;	90%

: 10025-73-7
chromium(III) chloride

: 7439-95-4
magnesium

: 7440-47-3
chromium

Conditions

Conditions	Yield
With potassium chloride; sodium chloride byproducts: MgCl2; 12 kg CrCl3, 3.5 kg Mg, 17.6 kg KCl and 12.4 kg NaCl mixed then heated in electric furnace at 800°C; formed MgCl2 dissolved and filtrated, remainder washed with water twice then with dild. HNO3;	94.2%
With potassium chloride In ethanol; water equimolar amts.; heating to melt; leaching with water, boiling with dild. aq. HNO3; purity: 99.55% Cr;	75%
With KCl In ethanol; water equimolar amts.; heating to melt; leaching with water, boiling with dild. aq. HNO3; purity: 99.55% Cr;	75%

: chromium(III) oxide

Ce(45),La(20),Nd(15),Pr(15),Y(0),Gd(0),Sm(0) (X%): Ce(45),La(20),Nd(15),Pr(15),Y(0),Gd(0),Sm(0) (X%)

: 7440-47-3
chromium

Conditions

Conditions	Yield
ignition in Mg-pot; 16g of Cr2O3, 20g of the alloy;	90%

: 27303-69-1
tris(η3-allyl)chromium

A: 74-98-6
propane

B: 7440-47-3
chromium

Conditions

Conditions	Yield
With hydrogen In further solvent(s) High Pressure; in perhydrocumol at 100 at;;	A 89% B n/a
With H2 In further solvent(s) High Pressure; in perhydrocumol at 100 at;;	A 89% B n/a

: chromium(III) oxide

: 7429-90-5
aluminium

: 7440-47-3
chromium

Conditions

Conditions	Yield
equimolar amts.; Al content: 0.5%;	82%
equimolar amts.; Al content: 0.5%;	82%
110% of the theoretically necessary Al; Al content: 5%;	73%

: Eisen(II)-chromit

: 12775-96-1, 15158-11-9, 15721-63-8, 16941-75-6, 17493-86-6, 19498-52-3, 20499-83-6, 20499-84-7, 20499-85-8, 20499-86-9, 20573-10-8, 20573-11-9, 21595-51-7, 21595-52-8, 22206-52-6, 26445-28-3, 28959-95-7, 37362-93-9, 39417-05-5, 54603-16-6, 54603-23-5, 54603-32-6, 54603-40-6, 54603-48-4, 54603-81-5, 54603-89-3, 56316-56-4, 95985-91-4, 122297-32-9, 7440-50-8
copper

: 7439-95-4
magnesium

: 7429-90-5
aluminium

: 7440-47-3
chromium

Conditions

Conditions	Yield
chromium iron ore reduced with Al in presence of 0.1-20 % of Cu and 2 % of Mg; molten metal has great fluidity and small surface tension because of Mg and Cu so sepn. between metal and slag simple;	82%
chromium iron ore reduced with Al in presence of 0.1-20 % of Cu and 2 % of Mg; molten metal has great fluidity and small surface tension because of Mg and Cu so sepn. between metal and slag simple;	82%

...Expand

: chromium(III) oxide

: 7440-70-2
calcium

: 7429-90-5
aluminium

A: tricalcium aliminate

B: 7440-47-3
chromium

Conditions

Conditions	Yield
60.9g of Cr2O3, 24g of Ca, 10.8g of Al;	A n/a B 74.3%
60.9g of Cr2O3, 24g of Ca, 10.8g of Al;	A n/a B 74.3%

...Expand

: chromium(III) oxide

: 1304-29-6
barium peroxide

: 7429-90-5
aluminium

: 7440-47-3
chromium

Conditions

Conditions	Yield
96% of the theoretically necessary Al; 80% BaO2 refer to used Al amt.; Al content: <0.1%;	74.3%
96% of the theoretically necessary Al; 80% BaO2 refer to used Al amt.; Al content: <0.1%;	74.3%
96% of the theoretically necessary Al; 30% BaO2 refer to used Al amt.; Al content: <.1%;	65%
96% of the theoretically necessary Al; 30% BaO2 refer to used Al amt.; Al content: <.1%;	65%

...Expand

: 7440-23-5
sodium

: 10025-73-7
chromium(III) chloride

: 7440-47-3
chromium

Conditions

Conditions	Yield
heating in a steel bomb; purity 99.86%;	57%
heating in a steel bomb; purity 99.86%;	57%
With hydrogen CrCl3 free from H2O; H2 flow and introducing of Na vapour; in china pot;
With H2 CrCl3 free from H2O; H2 flow and introducing of Na vapour; in china pot;

: 15604-50-9
CrCl2(tetrahydrofuran)2

: 75-24-1
trimethylaluminum

: 563-43-9
ethylaluminum dichloride

A: [((HN(C2H4SC6H11)2)Cr(methyl)(μ-Cl))2](Al2(CH3)6Cl)2

B: 7440-47-3
chromium

Conditions

Conditions	Yield
In toluene soln. of Cr-complex and amine stirred at 22 °C to give blue suspn., Al(CH3)3 added; soln. filtered, stand at -35 °C for 1 h, mother liquor removed, crystals washed (hexane), dried (vac.); elem. anal.;	A 32% B n/a

...Expand

: chromium dichloride

: sodium hydrogen sulfide

: 23936-60-9
1,2-bis(dimethylphosphanyl)ethane

A: 100681-53-6
tris(bis(1,2-dimethylphosphino)ethane)bis(μ3-sulfido)tris(μ2-sulfido)trichromium

B: 7440-47-3
chromium

Conditions

Conditions	Yield
In methanol to a soln. of CrCl2 and NaSH in methanol at -78°C excess of phosphine was added, warming slowly to room temp. over ca. 12 h; evapd. to dryness, recrystd. from toluene at -20°C; elem. anal.;	A 20% B n/a

...Expand

Reaxys ID: 11358736: Reaxys ID: 11358736

: 7440-47-3
chromium

Conditions

Conditions	Yield
In water at 60℃; for 2h; Electrolysis;

Reaxys ID: 11360458: Reaxys ID: 11360458

: 7440-47-3
chromium

Conditions

Conditions	Yield
In water at 60℃; for 2h; Electrolysis;

Reaxys ID: 11361274: Reaxys ID: 11361274

: 7440-47-3
chromium

Conditions

Conditions	Yield
Electrolysis;

Reaxys ID: 15738955: Reaxys ID: 15738955

A: 7440-47-3
chromium

B: 1333-74-0
hydrogen

Conditions

Conditions	Yield
With thiourea In water at 60℃; for 2h; Electrolysis;
With saccharin In water at 60℃; for 2h; Electrolysis;

Reaxys ID: 15738955: Reaxys ID: 15738955

: 7440-47-3
chromium

Conditions

Conditions	Yield
at 60℃; for 2h; Electrolysis;
With gelatin at 60℃; for 0.166667h; Electrolysis;
With potassium dichromate at 60℃; for 0.5h; Electrolysis;

Reaxys ID: 11385973: Reaxys ID: 11385973

: 7440-47-3
chromium

Conditions

Conditions	Yield
at 60℃; for 0.5h; Electrolysis;

Reaxys ID: 11380532: Reaxys ID: 11380532

: 7440-47-3
chromium

Conditions

Conditions	Yield
at 60℃; for 0.5h; Electrolysis;

: 13530-68-2
dichromic acid

: 7440-47-3
chromium

Conditions

Conditions	Yield
reaction mechanism is given;
reaction mechanism is given;

: iron silicon

: 7440-47-3
chromium

Conditions

Conditions	Yield
With methyllithium; sodium carbonate ferrochromium oxidized by heating with lime and sodium carbonate to mixture of chromite-cromate, mixture reduced with FeSi, FeSi free from C;
With binding agent; chromium ore finely dispersed chromium ore mixed with ferrosilicon and binding agent and heated at 1300°C;
With binding agent; chromium ore finely dispersed chromium ore mixed with ferrosilicon and binding agent and heated at 1300°C;

: iron silicon

: 7440-44-0
pyrographite

: 7440-47-3
chromium

Conditions

Conditions	Yield
With chromium ore chromium ore mixed with C, ferrosilicon and binding agent, briqueting, drying and heating at 1150-1300°C;

: 2Cr(3+)*2OH(1-)*SO4(2-)={Cr2(OH)2SO4}(2+)

: 7440-47-3
chromium

Conditions

Conditions	Yield
In not given Electrochem. Process;	0%

: potassium tris(oxalato)chromate(III)

: 7440-47-3
chromium

Conditions

Conditions	Yield
In not given	0%

Cr(0.2),Hg(b) (X%): Cr(0.2),Hg(b) (X%)

: 7440-47-3
chromium

Conditions

Conditions	Yield
decompn. of amalgame;
decompn. of amalgame;

: chromium sulfate

: 7440-47-3
chromium

Conditions

Conditions	Yield
In not given Electrochem. Process; neutral soln.;	0%
With sulfuric acid In not given Electrochem. Process; 1.5 mol/l CrSO4; 0.05 n H2SO4; anolyte: satd. Na2SO4; CO2 atm.; 30°C; 30 A/dm**2;
In not given Electrochem. Process; 0.77 mol/l, 1.4 mol/l or 1.6 mol/l; 30-35°C; 10.5 A/dm**2; under N2;
In not given Electrochem. Process; CO2 atm.;
In not given Electrochem. Process; 0.77 mol/l, 1.4 mol/l or 1.6 mol/l; 30-35°C; 10.5 A/dm**2; under N2;

: chromium(III) sulfate

: chromium sulfate

: 7440-47-3
chromium

Conditions

Conditions	Yield
With ammonium sulfate; sodium sulfate In not given Electrochem. Process; 15 g Cr/l; 42 g/l NH4(1+); 27 g/l Na(1+); 31°C; 7.0-8.6 A/dm**2; current efficiency 45%; asbestos diaphragm;
Electrochem. Process;
With ammonium sulfate In not given Electrochem. Process; 30 g Cr/l; 200-300 g/l (NH4)2SO4; 50-60°C; 8-12 A/dm**2; pH=2.3-3.0; anode: 99% Pb, 1% Ag alloy;

: chromium(II) hydroxide

: 7440-47-3
chromium

Conditions

Conditions	Yield
With H Electrochem. Process; redn. on cathode;
With H Electrochem. Process; redn. on cathode;

: ammonium tris(oxalato)chromate(III)

: 7440-47-3
chromium

Conditions

Conditions	Yield
In not given pH=7;

: triammonium hexaformiatochromate(III)

: 7440-47-3
chromium

Conditions

Conditions	Yield
In not given Electrochem. Process; pH=7;
In not given Electrochem. Process; pH=7;

: samarium(III) oxide

: 7440-47-3
chromium

: samarium chromite

Conditions

Conditions	Yield
With NaClO4 In neat (no solvent, solid phase) byproducts: NaCl; heating; washing (H2O), filtering, drying (80°C, 4 h);	99%
With O2 In neat (no solvent, solid phase) 800°C;	99%
sintering in air above 800°C;

: hafnium

: 7440-47-3
chromium

: 7440-21-3
silicon

: Hf2Cr4Si5

Conditions

Conditions	Yield
In melt Hf, Cr, and Si were pressed into pellets and arc-melted under Ar; X-ray powder diffraction;	99%

...Expand

: 7440-32-6
titanium

: 7440-47-3
chromium

: 7440-21-3
silicon

: Ti2Cr4Si5

Conditions

Conditions	Yield
In melt Ti, Cr, and Si were pressed into pellets and arc-melted under Ar; X-ray powder diffraction;	99%

...Expand

: 7440-67-7
zirconium

: 7440-47-3
chromium

: 7440-21-3
silicon

: Zr2Cr4Si5

Conditions

Conditions	Yield
In melt Zr, Cr, and Si were pressed into pellets and arc-melted under Ar; X-ray powder diffraction;	99%

...Expand

: 109-99-9
tetrahydrofuran

: 7440-47-3
chromium

: 76-05-1
trifluoroacetic acid

: [Cr3(μ3-O)(CF3COO)6(CH3COOH)2(C4H8O)]

Conditions

Conditions	Yield
In tetrahydrofuran; trifluoroacetic acid Electrolysis; sealed reactor, 1:1 volume ratio of solvents, at 0.001 A and 8 V at 343-353 K; crystd. on hstorage at 378 K over P2O5 for 3 d;	99%

...Expand

: 7440-47-3
chromium

: 75-05-8
acetonitrile

: 76-05-1
trifluoroacetic acid

: 845781-68-2
[Cr3(μ3-O)(CF3COO)6(CH3COOH)2(CF3COO)]

Conditions

Conditions	Yield
In acetonitrile; trifluoroacetic acid Electrolysis; sealed reactor, 1:1 volume ratio of solvents, at 0.01 A and 8 V at 343-353 K; crystd. on hstorage at 378 K over P2O5 for 3 d;	99%

...Expand

: 7440-47-3
chromium

: 63633-05-6
1-vinyl-2-hydroxymethyl(benz)imidazole

: (C3H2N2(CHCH2)CH2O)Cr(2+)*2ClO4(1-)=[(C3H2N2(CHCH2)CH2O)Cr](ClO4)2

Conditions

Conditions	Yield
With tetrabutylammonium perchlorate In acetonitrile Electrolysis; Ar; Pt cathode, metal sacrificial anode, c.d. 10-30 mA/cm**2, electrolyte 0.1-0.2 M tetrabutylammonium perchlorate; elem. anal.;	99%

: dysprosium((III) oxide

: 7440-47-3
chromium

: dysprosium chromite

Conditions

Conditions	Yield
With O2 In neat (no solvent, solid phase) 800°C;	99%
With NaClO4 In neat (no solvent, solid phase) byproducts: NaCl; heating; washing (H2O), filtering, drying (80°C, 4 h);	99%

: europium(III) oxide

: 7440-47-3
chromium

: europium chromite

Conditions

Conditions	Yield
With NaClO4 In neat (no solvent, solid phase) byproducts: NaCl; heating; washing (H2O), filtering, drying (80°C, 4 h);	99%

: cerium(III) oxide

: 7440-47-3
chromium

: cerium chromite

Conditions

Conditions	Yield
With NaClO4 In neat (no solvent, solid phase) byproducts: NaCl; heating; washing (H2O), filtering, drying (80°C, 4 h);	99%

: holmium(III) oxide

: 7440-47-3
chromium

: holmium chromite

Conditions

Conditions	Yield
With NaClO4 In neat (no solvent, solid phase) byproducts: NaCl; heating; washing (H2O), filtering, drying (80°C, 4 h);	99%

: lanthanum(III) oxide

: 7440-47-3
chromium

: lanthanum chromate

Conditions

Conditions	Yield
With O2 In neat (no solvent, solid phase) 800°C;	99%
With NaClO4 In neat (no solvent, solid phase) byproducts: NaCl; heating; washing (H2O), filtering, drying (80°C, 4 h);	99%

: yttrium(III) oxide

: 7440-47-3
chromium

: yttrium orthochromite

Conditions

Conditions	Yield
With NaClO4 In neat (no solvent, solid phase) byproducts: NaCl; heating; washing (H2O), filtering, drying (80°C, 4 h);	99%

: ytterbium(III) oxide

: 7440-47-3
chromium

: ytterbium chromite

Conditions

Conditions	Yield
With NaClO4 In neat (no solvent, solid phase) byproducts: NaCl; heating; washing (H2O), filtering, drying (80°C, 4 h);	99%

: erbium(III) oxide

: 7440-47-3
chromium

: erbium chromite

Conditions

Conditions	Yield
With NaClO4 In neat (no solvent, solid phase) byproducts: NaCl; heating; washing (H2O), filtering, drying (80°C, 4 h);	99%

: gadolinium(III) oxide

: 7440-47-3
chromium

: gadolinium orthochromite

Conditions

Conditions	Yield
With NaClO4 In neat (no solvent, solid phase) byproducts: NaCl; heating; washing (H2O), filtering, drying (80°C, 4 h);	99%

: terbium(III) oxide

: 7440-47-3
chromium

: Tb chromite

Conditions

Conditions	Yield
With NaClO4 In neat (no solvent, solid phase) byproducts: NaCl; heating; washing (H2O), filtering, drying (80°C, 4 h);	99%

: praseodymium(III) oxide

: 7440-47-3
chromium

: praseodymium chromite

Conditions

Conditions	Yield
With NaClO4 In neat (no solvent, solid phase) byproducts: NaCl; heating; washing (H2O), filtering, drying (80°C, 4 h);	99%

: neodymium(III) oxide

: 7440-47-3
chromium

: neodymium chromite

Conditions

Conditions	Yield
With NaClO4 In neat (no solvent, solid phase) byproducts: NaCl; heating; washing (H2O), filtering, drying (80°C, 4 h);	99%

: lutetium(III) oxide

: 7440-47-3
chromium

: Lu chromite

Conditions

Conditions	Yield
With NaClO4 In neat (no solvent, solid phase) byproducts: NaCl; heating; washing (H2O), filtering, drying (80°C, 4 h);	99%

: 7440-47-3
chromium

: 123-54-6
acetylacetone

: chromium(III) acetylacetonate

Conditions

Conditions	Yield
With Et4NBr In acetonitrile Electrolysis; electrolysis at 60°C in a cell with a chromium anode and a nickel catode, surface area of 100 and 35 cm2, resp.; 0.1 N Et4NBr in MeCN as supporting electrolytecurrent density of 15 mA cm-2; after electrolysis completion, mixt. diluted with water and extd. with CHCl3, dried over MgSO4, evapd; purified by pptn. with petroleum ether from a chlooform soln.; identified by elem. anal., IR, mass spectra;	97%
In neat (no solvent) byproducts: H2; Electrolysis; exclusion of air; addn. of acetylacetone and (n-Bu4N)Br to electrolysisautoclave with chromium anode, current 100 mV, initial voltage of 8 V, electrolysis for 27 h; concn (high vac.), recrystn., sublimation (100°C/1E-3 Torr);	94%
In acetonitrile Electrolysis; electrolysis (Pt-cathode, Cr-anode) of a soln. of 2,4-pentanedione/Bu4NFB4 (0.1M), 3-4 Ah, treated with ether/acetone, pptn.; filtered, dried in vacuum;	91%
With (C4H9)4NBF4 In acetonitrile Electrolysis; reaction of Cr anode with 30% soln. of acetylacetone in CH3CN with added 0.1 M Bu4NBF4, Pt cathode; addn. of ether-acetone mixture;; pptn.; drying in vacuo; crystallization from benzene-CH3CN mixture;;	91%
With tert-butylammonium hexafluorophosphate(V) In acetylacetone Electrochem. Process; tetra-n-butylammonium hexafluorophosphate added to dry acetylacetone, Crelectrode, 300 V, 10-50 mA, ca. 10 h; evapd. under vac., solid washed twice with hexane and twice with petroleum ether;	71.7%

: 7440-47-3
chromium

: 7440-02-0
nickel

: 7429-90-5
aluminium

: 7440-33-7
tungsten

A Ni(77.1),Cr(2.0),Al(17.9),W(3.0) (A%): Ni(77.1),Cr(2.0),Al(17.9),W(3.0) (A%)

B Ni(79.8),Cr(5.8),Al(12.2),W(2.2) (A%): Ni(79.8),Cr(5.8),Al(12.2),W(2.2) (A%)

Conditions

Conditions	Yield
In melt Electric Arc; ingots by arc melting of Ni(75)-Cr(2.5)-Al(20)-W(2.5) (at%), several remelts, sealed in silica tube under vac. with partial pressure of Ar, 1573K (2 weeks), furnace cooled to 1523K, 4 weeks, 1273K (6 weeks), quenched in iced water; electron microscopy, electron probe microanalysis, x-ray diffraction;	A 95% B 5%

...Expand

: potassium sulfide

: 7440-47-3
chromium

: phosphorous (V) sulfide

: 7704-34-9
sulfur

: potassium chromium thiophosphate

Conditions

Conditions	Yield
In neat (no solvent, solid phase) byproducts: KCrP2S7, KCrP2S7; Cr, P2S5, K2S and S sealed under vac. in silica tube, heated up to 200°C for 4 h, maintained at this temp. for 12 h, temp. raised to 550°C and kept for 7 d; cooled to room temp. (2°C/h);	95%

...Expand

: 110-80-5
2-ethoxy-ethanol

: 7440-47-3
chromium

: Cr(3+)*3CH3CH2O(CH2)2O(1-)=Cr(C2H5O(CH2)2O)3

Conditions

Conditions	Yield
In cellosolve=2-ethoxyethanol Electrochem. Process; soln. of Et4NBr, carbon steel cathode and Cr anode (N2); centrifugation, washing of ppt. (ethanol, twice), drying (vacuum); elem. anal.;	93.5%

: 7440-47-3
chromium

: 56-40-6
glycine

: 92126-99-3
tetrakis(glycine)tetrabromodichromium(II) tetrahydrate

Conditions

Conditions	Yield
With HBr In water (Ar or N2); Cr added to HBr soln., stirred for 3 h, hot ligand soln. added; ppt. warmed to 70°C to dissolved it, filtered, allowed to cool slowly overnight, filtered in air, washed with EtOH, second drop pptd. from filtrate; elem. anal.;	93.5%

: 3116-85-6
N,N'-(ethane-1,2-diyl)bis(1-(2-methoxyphenyl)methanimine)

: 7732-18-5
water

: 7440-47-3
chromium

: trichlorohydro[N,N'-bis(2-methoxybenzylideneethylenediamine)chromium(III) dihydrate]

Conditions

Conditions	Yield
In ethanol for 2h; Reflux;	93%

...Expand

: 1493-13-6
trifluorormethanesulfonic acid

: 7732-18-5
water

: 7440-47-3
chromium

: chromium(II) triflate hexahydrate

Conditions

Conditions	Yield
In water under Ar atm. using Schlenk techniques; to soln. of CF3SO3H in H2O Cr chips (treated with HClO4 and H2O) added in Schlenk tube; mixt. heated to 40°C; stirred for 7 ds; solvent evapd. (vac.);	91.2%

...Expand

: tetrafluoroboric acid

: 7440-47-3
chromium

: 67-68-5
dimethyl sulfoxide

: [Cr(dmso)6][BF4]3

Conditions

Conditions	Yield
In water; dimethyl sulfoxide Electrochem. Process; 20 h electrochem. oxidn. at 3.5 V, 100 mA; soln. warmed to ca 50°C with stirring; pptn. in 30 min; filtering; washing with diethyl ether; vac. drying; elem. anal.;	91%
In diethyl ether; dimethyl sulfoxide Electrochem. Process; 7 h electrochem. oxidn. at 6 V, 50 mA; soln. warmed to ca 50°C with stirring; filtering; washing with diethyl ether; vac. drying;

...Expand

Chromium Chemical Properties

IUPAC Name: Chromium
Molecular Formula: Cr
Molecular Weight: 51.996100 g/mol
EINECS: 231-157-5
Classification Code: Growth Substances; Micronutrients; Mutation data; Trace Elements; Tumor data
Stability: Stable. Incompatible with carbonates, strong bases, mineral acids, lithium, sulfur dioxide, strong acids.
Heat of fusion: 21.0 kJ·mol^-1
Heat of vaporization: 339.5 kJ·mol^-1
Melting Point: 4 °C
Density: 7.19 g/cm³
Flash Point: 50 °F
Boiling Point of Chromium (CAS NO.7440-47-3): 2671 °C

Chromium Uses

Chromium (CAS NO.7440-47-3) was used as a pigment, and after the discovery that the mineral chromite also contains chromium this latter mineral was used to produce pigments as well. Chromium was regarded with great interest because of its high corrosion resistance and hardness. A major development was the discovery that steel could be made highly resistant to corrosion and discoloration by adding chromium to form stainless steel. This application, along with chrome plating (electroplating with chromium) are currently the highest-volume uses of the metal.

Chromium Production

Approximately 4.4 million metric tons of marketable chromite ore were produced in 2000, and converted into ~3.3 million tons of ferro-chrome with an approximate market value of 2.5 billion United States dollars.The largest producers of chromium ore have been South Africa (44%) India (18%), Kazakhstan (16%) Zimbabwe (5%), Finland (4%) Iran (4%) and Brazil (2%) with several other countries producing the rest of less than 10% of the world production.The two main products of chromium ore refining are ferrochromium and metallic chromium.

Chromium Toxicity Data With Reference

Organism	Test Type	Route	Reported Dose (Normalized Dose)	Effect	Source
rat	LD50	unreported	27500ug/kg (27.5mg/kg)		Gigiena i Sanitariya. For English translation, see HYSAAV. Vol. 37(10), Pg. 27, 1972.

Chromium Consensus Reports

Chromium and its compounds are on the Community Right-To-Know List. Chromium is reported in EPA TSCA Inventory.

Chromium Safety Profile

Powder will explode spontaneously in air. Ignites and is potentially explosive in atmospheres of carbon dioxide. Violent or explosive reaction when heated with ammonium nitrate. May ignite or react violently with bromine pentafluoride. Incandescent reaction with nitrogen oxide or sulfur dioxide. Incompatible with oxidants.
Hazard Codes: F, Corrosive C, Harmful Xn
Risk Statements: 11-20/21/22-34-40-23
R11:Highly flammable.
R20/21/22:Harmful by inhalation, in contact with skin and if swallowed.
R34:Causes burns.
R40:Limited evidence of a carcinogenic effect.
R23 :Toxic by inhalation.
Safety Statements: 16-26-36/37/39-45-36/37-27
S16:Keep away from sources of ignition.
S26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.
S36/37/39:Wear suitable protective clothing, gloves and eye/face protection.
S45:In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.)
S36/37:Wear suitable protective clothing and gloves.
S27:Take off immediately all contaminated clothing.
RIDADR: UN 2924 3/PG 2
WGK Germany: 3
RTECS: GB4200000
HazardClass: 4.1
PackingGroup: III

Chromium Standards and Recommendations

OSHA PEL: TWA 1 mg/m³
ACGIH TLV: TWA 0.5 (Cr)mg/m³; Not Classifiable as a Carcinogen

Chromium Analytical Methods

For occupational chemical analysis use OSHA: #ID-125G or NIOSH: Chromium, 7024; Welding and Brazing Fume, 7200; Elements, 7300.

Chromium Specification

Chromium (CAS NO.7440-47-3), its Synonyms are Chrom ; Chrome ; Chromium metal ; Chromium compounds . It is very hard gray solid with a metallic luster.

Product Name

Chromium

Synthetic route

Chromium Chemical Properties

Chromium Uses

Chromium Production

Chromium Toxicity Data With Reference

Chromium Consensus Reports

Chromium Safety Profile

Chromium Standards and Recommendations

Chromium Analytical Methods

Chromium Specification

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