Barium supplier | CasNO.7440-39-3

Name
Barium
EINECS 231-149-1
CAS No. 7440-39-3
Article Data214
CAS DataBase
Density 3.6 g/mL at 25 °C(lit.)
Solubility Insoluble(decomposes)
Melting Point 725 °C(lit.)
Formula Ba
Boiling Point 1640 °C(lit.)
Molecular Weight 137.33
Flash Point
Transport Information UN 3264 8
Appearance rod
Safety Water and stomach acids solubilize barium salts and can cause poisoning. Symptoms are vomiting, colic, diarrhea, slow irregular pulse, transient hypertension, and convulsive tremors and muscular paralysis. Death may occur in a few hours to a few days. Half-life of barium in bone has been estimated at 50 days. Dust is dangerous and explosive when exposed to heat, flame, or chemical reaction. Violent or explosive reaction with water, CCl₄, fluorotrichloromethane, trichloroethylene, and C₂Cl₄. Incompatible with acids, C₂Cl₃F₃, C₂H₂FCl₃, C₂HCl₃ and water, 1,1,2-trichlorotrifluoroethane, and fluorotrichloroethane. The powder may ignite or explode in air or other oxidizing gases. See also BARIUM COMPOUNDS (soluble).
Analytical Methods:

For occupational chemical analysis use NIOSH: Barium, Soluble Compounds, 7056.
Risk Codes 25-26-34
Molecular Structure
Hazard Symbols Flammable (pyrophoric) at room temperature in powder form; store under inert gas, petroleum, or other oxygen-free liquid. When heated to approximately 200C in hydrogen, barium reacts violently, forming BaH₂. TLV: for all soluble barium compounds, 0.5 mg/m³ (as barium).
Synonyms Bariumelement;
PSA 0.00000
LogP 0.22500

Synthetic route

: barium hexammine

: 7440-39-3
barium

Conditions

Conditions	Yield
byproducts: NH3; decompn. in vac.;	100%

: barium azide

: 7440-39-3
barium

Conditions

Conditions	Yield
from solid recrystd. BaN6; hydrolysis; pure metal;	100%
In neat (no solvent) thermic decomposition of Ba(N3)2;;
byproducts: nitrogen; at 160-120 °C;

: 7429-90-5
aluminium

: barium(II) oxide

: 7440-39-3
barium

Conditions

Conditions	Yield
5h in vac. at 1300-1340 °C; Metal distilles off. Repeated distn. gives 99.5% purity;	98.5%
4h in vac. at 1010-1030 °C; opening of apparatus under CO2, crushing of product under desiccated toluene to avoid self inflammation; Metal sublimes off. Repeated distn. gives 99.48% purity;
sublimation in vac.; 99.9% Ba;
sublimation in vac.; 99.9% Ba;

: beryllium

: barium(II) oxide

: 7440-39-3
barium

Conditions

Conditions	Yield
1.5h at 1250°C; Ba distilles off;	63%
1.5h at 1250°C; Ba distilles off;	63%
1.5h in vac. at 1220-1230 °C;

: barium carbonate

A: 7440-39-3
barium

B: 7440-44-0
pyrographite

C: barium(II) oxide

Conditions

Conditions	Yield
In neat (no solvent) byproducts: CO, CO2; thermal decompn. (700-1200 K, 30-40 K steps, 5 min at each temp.-step); Auger spectroscopy, pressure monitoring;

...Expand

: barium carbonate

A: barium acetylide

B: 7440-39-3
barium

Conditions

Conditions	Yield
With pyrographite In neat (no solvent) heating of BaCO3 and charcoal forms BaO; BaO is reduced above 1400°C forming Ba or BaC2; examination of the weight-loss depending on heating rate;;
With charcoal

: barium carbonate

: 7440-39-3
barium

Conditions

Conditions	Yield
With Fe/Si alloy In neat (no solvent) reduction of BaCO3 with an Fe-Si-alloy with 25% Fe;;
With Ta or Nb In neat (no solvent) reduction of BaCO3 with Ta or Nb at 1600°C;;
With Fe/Si alloy In neat (no solvent) reduction of BaCO3 with an Fe-Si-alloy with 25% Fe;;

: 7439-95-4
magnesium

: barium carbonate

A: 7440-39-3
barium

B: barium(II) oxide

...Expand

: barium carbonate

: 7429-90-5
aluminium

A: 1333-84-2, 1344-28-1
aluminum oxide

B: 7440-39-3
barium

Conditions

Conditions	Yield
In neat (no solvent) byproducts: C; heating equal amounts of carbonate and Al powder to red heat;; powdery product mixture obtained;;
In neat (no solvent) byproducts: C; heating equal amounts of carbonate and Al powder to red heat;; powdery product mixture obtained;;

...Expand

: 7440-44-0
pyrographite

: barium carbonate

A: 201230-82-2
carbon monoxide

B: 7440-39-3
barium

Conditions

Conditions	Yield
With barium(II) chloride In neat (no solvent) Electrolysis; satn. of molten BaCl2-LiCl- or BaCl2-NaCl-mixtures with BaCO3, electrolysis for 1.5h (3-4 V, 10 A, carbon electrodes) forms Ba and CO;;
With BaCl2; LiCl or NaCl

...Expand

: barium sulfide

: 7440-39-3
barium

Conditions

Conditions	Yield
With Ti or Zr or Hf or Al or Be In neat (no solvent) reduction of BaS with Ti or Zr or Hf or Al or Be at approx. 900°C in vac.;;
In melt Electrolysis; electrolysis of waterfree BaS in BaF2- or cryolite melt under a inert or reducing atmosphere (H2 or Ar) at normal or reduced pressure with C-electrodes; electrolysis in absence of air, N2 and O2;;
With Ce or Th or U In neat (no solvent) attack of metals like Ce, Th or U above 1500°C on BaS under formation of gaseous Ba;;

: barium(II) oxide

A: barium nitride

B: 7440-39-3
barium

Conditions

Conditions	Yield
With sodium cyanide byproducts: Na, CO, nitrogen; at 750°C in vac.; formation of alloy with Na;	A 0% B n/a

: barium(II) oxide

: 7440-39-3
barium

Conditions

Conditions	Yield
In neat (no solvent) Electrolysis; electrolytic decomposition of BaO forms Ba;;
With Al or Mg In neat (no solvent) warming of BaO in pieces or as powder; put into contact with molten Al or Mg at temperatures that BaO smelts quickly;;
With Al or Ti or Zr or Nb or W or Mo In neat (no solvent) reduction of an intermediary Ba-beryllate (formed from BaO and BeO) with Al or Ti or Zr or Nb or W or Mo;;

: barium(II) oxide

A: 80937-33-3
oxygen

B: 7440-39-3
barium

Conditions

Conditions	Yield
In neat (no solvent) dissociation of BaO in gaseous Ba and O2 at 1073 K, 1273 K and 1473 K; examination of the equilibrium;;
In neat (no solvent) dissociation of BaO in gaseous Ba and O2 at 1073 K, 1273 K and 1473 K; examination of the equilibrium;;

: 7440-09-7
potassium

: barium(II) oxide

: 7440-39-3
barium

Conditions

Conditions	Yield
partial reduction of BaO on heating with K;
heating; extn. (Hg) and decompn. of amalgam;

: barium(II) oxide

: 7439-98-7
molybdenum

A: barium molybdate

B: 7440-39-3
barium

...Expand

: barium(II) oxide

: 7439-98-7
molybdenum

A: 3Ba(2+)*MoO6(6-)=Ba3MoO6

B: 7440-39-3
barium

...Expand

: 7439-95-4
magnesium

: barium(II) oxide

A: magnesium oxide

B: 7440-39-3
barium

Conditions

Conditions	Yield
In neat (no solvent) reduction of solid BaO with gaseous Mg forms gaseous Ba and MgO;;

...Expand

: 7439-95-4
magnesium

: barium(II) oxide

: 7440-39-3
barium

Conditions

Conditions	Yield
byproducts: MgO; at higher temp.; equil.; no pure Ba obtainable;

: 7439-95-4
magnesium

: barium(II) oxide

A: barium suboxide

B: 7440-39-3
barium

Conditions

Conditions	Yield
above 360°C at normal pressure; at 490°C explosive react.;
above 500°C in vac.;
above 500°C in vac.;
above 360°C at normal pressure; at 490°C explosive react.;

...Expand

: 7440-02-0
nickel

: barium(II) oxide

A: 1313-99-1
nickel(II) oxide

B: 7440-39-3
barium

Conditions

Conditions	Yield
In neat (no solvent) reduction of solid BaO with solid Ni forms gaseous Ba and solid NiO;;
equilibrium constant at 800-1200°C;

...Expand

: 7440-70-2
calcium

: barium(II) oxide

: 7440-39-3
barium

Conditions

Conditions	Yield
at 1100 °C; gaseous Ba for spectroscopic purposes;
big excess of BaO; Ba vapour spreading through BaO layer before condensation;

: hafnium

: barium(II) oxide

: 7440-39-3
barium

Conditions

Conditions	Yield
forming metal mirror for special purposes;

: barium(II) oxide

: 7440-21-3
silicon

A: barium silicate

B: 7440-39-3
barium

Conditions

Conditions	Yield
at 1200 °C in vac.; 98.5% Ba;
In neat (no solvent) reaction of solid BaO with solid Si forms gaseous Ba and solid BaSiO3;;

...Expand

: barium(II) oxide

: 7440-21-3
silicon

A: 112926-00-8, 7631-86-9
silica gel

B: 7440-39-3
barium

Conditions

Conditions	Yield
In neat (no solvent) endothermic reduction of BaO with Si under formation of Ba and SiO2;;
In neat (no solvent) reaction of solid BaO with solid Si forms gaseous Ba and liquid SiO2;;
In neat (no solvent) endothermic reduction of BaO with Si under formation of Ba and SiO2;;

...Expand

: 7440-32-6
titanium

: barium(II) oxide

: 7440-39-3
barium

Conditions

Conditions	Yield
forming metal mirror for special purposes;

: 7440-67-7
zirconium

: barium(II) oxide

: 7440-39-3
barium

Conditions

Conditions	Yield
forming metal mirror for special purposes;

: 7727-37-9
nitrogen

: 7440-39-3
barium

: barium nitride

Conditions

Conditions	Yield
260-560°C, then 0.5h at 600°C;	100%
In neat (no solvent) exothermic formation out of the elements at temperatures under the melting point of Ba; after heating cooling to keeping the necessary temperature;;
above 190°C; 96.15% Ba3N2;

: 7727-37-9
nitrogen

: 7440-39-3
barium

: barium subnitride

Conditions

Conditions	Yield
In neat (no solvent) loading and unloading carried out in inert gas; Ba metal loaded in tungsten crucible, which palced in a steel tube before loaded in quartz glasstube; evacuated (p<1E-6 bar); heated in stream of nitrogen at 1120 K fo r 24 h; evacuated again (p<1E-6 bar) for 24 h at 900 K; elem. anal.;	100%
In further solvent(s) absence of air and moisture; passing N2 through soln. of Ba in liquid Naat 573 K (pptn.); filtration; reaction followed by resistivity measurements;
In further solvent(s) under inert atmosphere; Ba submerged in molten Na in stainless steel crucible; sealed; evacuated; filled with N2; heated at 973 K for 48 h; cooled under vac.; heated at 723 K for 24 h; cooled to room temp.; opened in Ar filled glovebox; detd. by X-ray powder diffraction;

: 7440-56-4
germanium

: 7439-93-2
lithium

: 7440-39-3
barium

: 4Ba(2+)*2Li(1+)*Ge6(10-)=Ba4Li2Ge6

Conditions

Conditions	Yield
In neat (no solvent) Ar atm.; molar ratio Ba:Li:Ge 4:2.1:6, 1000°C; cooling (400°C), annealing;	100%

...Expand

: 7439-93-2
lithium

: 7440-39-3
barium

: 7440-21-3
silicon

: 4Ba(2+)*2Li(1+)*Si6(10-)=Ba4Li2Si6

Conditions

Conditions	Yield
In neat (no solvent) Ar atm.; molar ratio Ba:Li:Si 4:2.1:6, 1000°C; cooling (400°C), annealing;	100%

...Expand

: 641616-32-2
2,2-dimethyl-5-(N',N'-dimethylaminopropyl-imino)-8-methoxyoctan-3-one

: 7440-39-3
barium

: barium(II)-bis-[2,2-dimethyl-5-(N',N'-dimethylaminopropyl-imino)-8-methoxy-5-octanoat]

Conditions

Conditions	Yield
at 20℃; for 168h;	99%

: 7440-56-4
germanium

: 7782-49-2
selenium

: 7440-39-3
barium

: barium ortho-seleno-germanate

Conditions

Conditions	Yield
In neat (no solvent) Ba:Ge:Se=2:1:4 ratio, sealed silica tube, with exclusion of air, heatingat 800 °C, keeing at this temp. for 5 d; slow (1 °C/h) cooling to room temp.;	99%

...Expand

: 7782-49-2
selenium

: 7440-31-5
tin

: 7440-39-3
barium

: Ba2SnSe5

Conditions

Conditions	Yield
In neat (no solvent) mixt. of Ba, Sn, Se in stoich. ratio 2:1:5 was placed into fused silica tube; sealed under vac.; put into furnace; heated to 750°C within3 ds; kept at 750°C for 4 ds; cooled to 700°C within 10 m in; annealed at 650°C for 4 ds; cooled to room temp. within 4 ds;	99%
Stage #1: selenium; tin; barium at 750℃; for 150h; Sealed tube; Stage #2: at 650℃; for 100h;

...Expand

: 7440-36-0
antimony

: 7440-39-3
barium

: Ba11Sb10

Conditions

Conditions	Yield
In melt Electric Arc; 1:1-mixt. of Sr and Sb;	99%
In melt under Ar; mixt. of Ba (12.43 mmol) and Sb (8.276) heated to 850°Cwith 200°C/h, cooled to room temp. with 100°C/h;
In melt 5:4-mixt. of Ba and Sb heated in alumina or Ta-crucible to 1100°C, kept at this temp. for ca. 1 h, cooled with 50-100°C/h;

: phosphorus

: 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

: 7440-39-3
barium

: BaCu10P4

Conditions

Conditions	Yield
In neat (no solvent) molar ratio Ba:Cu:P=1:10:4, pressing powders ino pellets (under N2), heating in Al-boat inside sealed quartz tube (rapidly to 800°C, at 60°C to 1200°C, 1200°C for 24 h), cooling to 800°C at 60°C/h;	99%

...Expand

: niobium pentaisopropoxide

: 7440-39-3
barium

: BaNb2(OCH(CH3)2)12((CH3)2CHOH)2

Conditions

Conditions	Yield
In isopropyl alcohol molar ratio Ba:Nb=1:2; elem. anal.;	99%

: 7440-69-9
bismuth

: 7439-91-0
lanthanum

: 7440-39-3
barium

: 7704-34-9
sulfur

: BaLaBi2S6

Conditions

Conditions	Yield
In neat (no solvent) stoich. amts., carbon-coated sealed glass tube (vac.), 830°C (5 d), cooling to 530°C at 10°C/h, then to 100°C over 12 h; washing (degassed water, MeOH, ether);	95%

...Expand

: 7440-74-6
indium

: 7440-39-3
barium

: 7440-57-5, 457905-15-6
gold

: BaAuIn3

Conditions

Conditions	Yield
In neat (no solvent) mixt. Ba, Au, and In in welded tantalum tube was heated at 1050°Cfor 4 h, quenched in water, reheated at 600°C for 7 days, and co oled at 5°C to room temp.; elem. anal.;	95%

...Expand

: thallium

: 7440-39-3
barium

: 7440-57-5, 457905-15-6
gold

: BaAuTl3

Conditions

Conditions	Yield
In neat (no solvent) mixt. Ba, Au, and Tl in welded tantalum tube was heated at 1050°Cfor 4 h, quenched in water, reheated at 600°C for 7 days, and co oled at 5°C to room temp.; elem. anal.;	95%

...Expand

: thallium

: 7440-39-3
barium

: 7440-57-5, 457905-15-6
gold

: BaAu0.4Tl1.6

Conditions

Conditions	Yield
In neat (no solvent) mixt. Ba, Au, and Tl (1:0.4:1.6) in Nb tubing was heated at 1000°C, quenched in water and annealed at 600°C for 4 days;	95%

...Expand

: 7440-56-4
germanium

: 7440-39-3
barium

: Ba5Ge3

Conditions

Conditions	Yield
In neat (no solvent, solid phase) placing of Ba and Ge in welded Ta containers, heating under vac. at 1150°C for 6 h, cooling to 650°C with rate of 10-12°C/h;	95%

: 7439-91-0
lanthanum

: 7782-49-2
selenium

: bismuth(III) selenide

: 7440-39-3
barium

: BaLaBi2Se6

Conditions

Conditions	Yield
In neat (no solvent) stoich. amts., carbon-coated sealed glass tube (vac.), 830°C (5 d), cooling to 530°C at 10°C/h, then to 100°C over 12 h; powder X-ray diffraction;	95%

...Expand

: 7440-22-4
silver

: 7440-39-3
barium

: 7704-34-9
sulfur

A: Ba2Ag8S7

B: Ba2Ag10S7

Conditions

Conditions	Yield
In ammonia; ethylenediamine NH3 (liquid); Electrolysis; (N2); warming Ba and S in liquid NH3 to room temp. over 24 h, heating the amorphous product to 550°C under vac. to get a crystd. batch, addn. of ethylenediamine, heating to 110°C for 2 h, electrolysis (Ag electrodes, 1.0 V, 3 d); drying of the two compounds;	A 95% B 5%

...Expand

: 109-99-9
tetrahydrofuran

: 3179-63-3
3-Dimethylamino-1-propanol

: 16712-25-7, 25535-55-1, 27147-22-4
copper(II) trifluoroacetate

: 7440-39-3
barium

: Ba(3-(dimethylamino)propan-1-olate)4Cu4(trifluoroacetate)6*(tetrahydrofuran)

Conditions

Conditions	Yield
In tetrahydrofuran (N2, Schlenk techniques); addn. of Ba to soln. of nitrogen compd. in C4H8O, stirring for 2 h until Ba was consumed, dropwise addn. of soln. of copper compd. in C4H8O, stirring for 5 h; filtration, evapn. to dryness under vacuum, dissolving in C4H8O, isolation of crystals after 3 days, elem. anal.;	95%

...Expand

: 7440-56-4
germanium

: 7440-22-4
silver

: 7440-39-3
barium

: 7704-34-9
sulfur

: BaAg2GeS4

Conditions

Conditions	Yield
Stage #1: germanium; silver; barium; sulfur With barium(II) chloride at 299.84℃; under 7.50075E-06 Torr; for 20h; Sealed tube; Stage #2: at 899.84℃; under 7.50075E-06 Torr; for 100h; Sealed tube;	95%

...Expand

: 17455-13-9
18-crown-6 ether

: 17587-22-3
6,6,7,7,8,8,8-heptafluoro-2,2-dimethyl-3,5,octanedione

: 7440-39-3
barium

: [Ba(1,1,1,2,2,3,3-heptafluoro-7,7-dimethyloctane-4,6-dionato)2(1,4,7,10,13,16-hexaoxacyclooctadecane)]

Conditions

Conditions	Yield
Stage #1: 18-crown-6 ether; barium In ethanol Schlenk technique; Inert atmosphere; Reflux; Stage #2: 6,6,7,7,8,8,8-heptafluoro-2,2-dimethyl-3,5,octanedione In ethanol for 1h; Schlenk technique; Inert atmosphere; Reflux;	95%

...Expand

: 7664-41-7
ammonia

: 7440-39-3
barium

: barium amide

Conditions

Conditions	Yield
at 20℃; Schlenk technique; Glovebox; Inert atmosphere;	93%
platinum In ammonia byproducts: H2; decompn. of a soln. of the metal in NH3 at -37°C using a Pt-wire as catalyst, 2 weeks; exclusion of O2 and moisture;;
In ammonia NH3 (liquid); dissoln. of Ba in liquid NH3 at -77°C in a pressure tube, warmingto room temp. (20 h), recooling to -40°C, evapn. of NH3 by a N2 stream; elem. anal.;

: 41924-26-9
bis((trimethylsilyl)methyl)zinc

: 7440-39-3
barium

: 108-88-3
toluene

: bis(η6-toluene)barium bis(tris((trimethylsilyl)methyl)zincate)

Conditions

Conditions	Yield
In toluene under Ar atm. to soln. bis((trimethylsilyl)methyl)zinc in toluene was added Ba and stired at room temp. for 36 h; soln. was filtered, soln. was concd. and cooled to -20°C; elem. anal.;	93%

...Expand

: 110-71-4
1,2-dimethoxyethane

: 7440-39-3
barium

: 74663-75-5
1,2-bis(2,6-diisopropylphenylimino)ethane

: C56H82BaN4O2

Conditions

Conditions	Yield
at 20℃; for 168h; Inert atmosphere;	92%

...Expand

: 109-86-4
2-methoxy-ethanol

: 7440-39-3
barium

: 4C3H8O2*10C3H7O2(1-)*6Ba(2+)*O(2-)

Conditions

Conditions	Yield
In toluene	90%

: 7440-74-6
indium

: 7440-39-3
barium

: 7704-34-9
sulfur

: barium thioindate

Conditions

Conditions	Yield
at 400 - 1000℃; for 63h; Glovebox; Inert atmosphere; Sealed tube;	90%
In neat (no solvent) heating in corundum crucible in closed quartz ampoule to 300°C (40°C/h); holding, 1h; heating to 1250°C (50°C/h); annealing, 1h; cooling to room temp. (100°C/h); elem. anal.;

...Expand

Barium Chemical Properties

Molecular Structure:

Molecular Formula: Ba
Molecular Weight: 137.327
IUPAC Name: Barium
Synonyms of Barium (CAS NO.7440-39-3): Bario ; Bario [Spanish] ; Baryum ; Baryum [French] ; EINECS 231-149-1 ; HSDB 4481 ; Barium [UN1400] [Dangerous when wet] ; Barium and soluble compounds ; Barium, soluble compounds ; Barium, water-soluble compounds, n.o.s. ; UN1400
CAS NO: 7440-39-3
Classification Code: Inorganics ; Alkali MetalsMetal and Ceramic Science ; Barium ; Metals ; Reduction ; Synthetic Reagents ; AA Standard SolutionsAlphabetic ; AAS ; B ; BA - BHSpectroscopy ; ChlorideSpectroscopy ; Matrix Selection ; Reference/Calibration Standards ; Single Solution ; Standard Solutions
Melting point: 725 °C(lit.)
Boiling point: 1640 °C(lit.)
Density: 3.6 g/mL at 25 °C(lit.)
Storage temp.: water-free area
Form: rod

Barium Uses

Barium (CAS NO.7440-39-3) is commonly used for the preparation of barium salts, alloys, fireworks, nuclear reactors, and it is also a good oxygen scavenger to produce refined copper.

Barium Toxicity Data With Reference

RTECS: CQ8370000

Barium Consensus Reports

Reported in EPA TSCA Inventory. Community Right-To-Know List.

Barium Safety Profile

Hazard Codes of Barium (CAS NO.7440-39-3): Corrosive C, Irritant Xi, Flammable F
Risk Statements: 25-26-34-36/37/38-14/15-11
R25: Toxic if swallowed.
R26: Very toxic by inhalation.
R34: Causes burns.
R36/37/38: Irritating to eyes, respiratory system and skin.
R14 :Reacts violently with water.
R15: Contact with water liberates extremely flammable gases.
R11: Highly flammable.
Safety Statements: 23-26-36/37/39-45-43-16
S23: Do not breathe vapour.
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.)
S43: In case of fire use ... (there follows the type of fire-fighting equipment to be used.)
S16: Keep away from sources of ignition.
RIDADR: UN 3264 8/PG 3
WGK Germany: 3
RTECS: CQ8370000
HazardClass: 8
PackingGroup: III
Water and stomach acids solubilize barium salts and can cause poisoning. Symptoms are vomiting, colic, diarrhea, slow irregular pulse, transient hypertension, and convulsive tremors and muscular paralysis. Death may occur in a few hours to a few days. Half-life of barium in bone has been estimated at 50 days. Dust is dangerous and explosive when exposed to heat, flame, or chemical reaction. Violent or explosive reaction with water, CCl₄, fluorotrichloromethane, trichloroethylene, and C₂Cl₄. Incompatible with acids, C₂Cl₃F₃, C₂H₂FCl₃, C₂HCl₃ and water, 1,1,2-trichlorotrifluoroethane, and fluorotrichloroethane. The powder may ignite or explode in air or other oxidizing gases.

Barium Standards and Recommendations

OSHA PEL: TWA 0.5 mg(Ba)/m³
ACGIH TLV: TWA 0.5 mg(Ba)/m³; Not Classifiable as a Human Carcinogen
DFG MAK: 0.5 mg(Ba)/m³
DOT Classification: 4.3; Label: Dangerous When Wet

Barium Analytical Methods

For occupational chemical analysis use NIOSH: Barium, Soluble Compounds, 7056.

Barium Specification

Barium is a chemical element with symbolBa and atomic number56. It is the fifth element in Group 2, a soft silvery metallic alkaline earth metal. Because of its high chemical reactivity barium is never found in nature as a free element. Its hydroxide was known in pre-modern history as baryta; this substance does not occur as a mineral, but can be prepared by heating barium carbonate.
The most common naturally occurring minerals of barium are barite (barium sulfate, BaSO4) and witherite (barium carbonate, BaCO3), both being insoluble in water. Barium's name originates from the alchemical derivative "baryta", which itself comes from Greek βαρ?ς (barys), meaning "heavy." Baric is the adjective form of barium. Barium was identified as a new element in 1774, but not reduced to a metal until 1808 with the advent of electrolysis.
Barium has only a few industrial applications. The metal has been historically used as a getter for vacuum tubes. It is a component of YBCO (high-temperature superconductors) and electroceramics, and is added to steel and cast iron to reduce the size of carbon grains within the microstructure of the metal. Barium compounds are added to fireworks to impart a green color. Barium sulfate is used as an insoluble heavy additive to oil well drilling fluid, as well as in a purer form, as X-ray radiocontrast agents for imaging the human gastrointestinal tract. Soluble barium compounds are poisonous due to release of the soluble barium ion, and therefore have been used as rodenticides.

Product Name

Barium

Synthetic route

Barium Chemical Properties

Barium Uses

Barium Toxicity Data With Reference

Barium Consensus Reports

Barium Safety Profile

Barium Standards and Recommendations

Barium Analytical Methods

Barium Specification

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