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Defination Occurrence Uses
Chemical Name:
bario;BARIUM;barium(0);BARIUM, ROD;Barium, 99+%;BARIUM METAL;Barium powder;Barium element;bario (spanish);baryum (french)
Molecular Formula:
Formula Weight:
MOL File:

Barium Properties

Melting point:
725 °C(lit.)
Boiling point:
1640 °C(lit.)
3.6 g/mL at 25 °C(lit.)
storage temp. 
water-free area
air sensitive, moisture sensitive
Stability Reacts vigorously or violently with acids, water, tetrachloromethane, small halogenated hydrocarbons. Should be stored under an inert material such as petroleum ether to exclude air. Flammable.
CAS DataBase Reference
7440-39-3(CAS DataBase Reference)
  • Risk and Safety Statements
  • Hazard and Precautionary Statements (GHS)
Hazard Codes  C,Xi,F
Risk Statements  25-26-34-36/37/38-14/15-11
Safety Statements  23-26-36-36/37/39-45-43-36/37-16
RIDADR  UN 3264 8/PG 3
WGK Germany  3
RTECS  CQ8370000
HazardClass  8
PackingGroup  III
Signal word: Danger
Hazard statements:
Code Hazard statements Hazard class Category Signal word Pictogram P-Codes
H228 Flammable solid Flammable solids Category 1
Category 2
P210, P240,P241, P280, P370+P378
H261 In contact with water releases flammable gas Substances And Mixtures Which, In Contact With Water,Emit Flammable Gases Category 2
Category 3
P231+P232, P280, P370+P378,P402+P404, P501
Precautionary statements:
P210 Keep away from heat/sparks/open flames/hot surfaces. — No smoking.
P223 Keep away from any possible contact with water, because of violent reaction and possible flash fire.
P240 Ground/bond container and receiving equipment.
P280 Wear protective gloves/protective clothing/eye protection/face protection.
P231+P232 Handle under inert gas. Protect from moisture.
P335+P334 Brush off loose particles from skin. Immerse in cool water/wrap in wet bandages.
P370+P378 In case of fire: Use … for extinction.
P402+P404 Store in a dry place. Store in a closed container.

Barium price More Price(25)

Manufacturer Product number Product description CAS number Packaging Price Updated Buy
Sigma-Aldrich 237094 Barium rod, diam. ~2cm, ≥99% trace metals basis 7440-39-3 25g $67.9 2017-11-08 Buy
Sigma-Aldrich 1.12046 Barium 7440-39-3 1EA $240 2017-11-08 Buy
Alfa Aesar 00653 Barium pieces, 2.5cm (1in) & down, 99.2% (metals basis), Sr ≤0.8% 7440-39-3 50g $172 2017-11-08 Buy
Alfa Aesar 00653 Barium pieces, 2.5cm (1in) & down, 99.2% (metals basis), Sr ≤0.8% 7440-39-3 5g $30.1 2017-11-08 Buy
Strem Chemicals 56-0074 Barium pieces, dendritic (99.9%) 7440-39-3 5g $405 2017-11-27 Buy

Barium Chemical Properties,Uses,Production


Symbol Ba; atomic number 56; atomic weight 137.327; a Group IIA (Group 2) alkaline earth element; electronic configuration [Xe]s2; valence state +2; ionic radius of Ba2+ in crystal (corresponding to coordination number 8) 1.42 Å; first ionization potential 10.00eV; stable isotopes and their percent abundances: Ba–138 (71.70), Ba–137 (11.23), Ba–136 (7.85), Ba–135 (6.59), Ba–134 (2.42); minor isotopes: Ba–130 (0.106) and Ba–132 (0.101); also twenty-two radioisotopes are known.


Barium was discovered in 1808 by Sir Humphrey Davy. Its abundance in the earth’s crust is about 0.0425% (425 mg/kg). The element also is found in sea water at trace concentration, 13 μg/L. It occurs in the minerals barite or heavy spar (as sulfate) and witherite (as carbonate).


The most important use of barium is as a scavenger in electronic tubes. The metal, often in powder form or as an alloy with aluminum, is employed to remove the last traces of gases from vacuum and television picture tubes. Alloys of barium have numerous applications. It is incorporated to lead alloy grids of acid batteries for better performance; and added to molten steel and metals in deoxidizing alloys to lower the oxygen content. Thin films of barium are used as lubricant suitable at high temperatures on the rotors of anodes in vacuum X-ray tubes and on alloys used for spark plugs. A few radioactive isotopes of this element find applications in nuclear reactions and spectrometry.

Chemical Properties

yellow-white, slightly lustrous solid


Alloys with Al or Mg as "getters" to remove residual gases from vacuum systems and electronic tubes. Deoxidizer for steel and other metals. Carrier for radium. The b- and g-radiation emitted by 140Ba + 140La makes a large contribution to the activity of the fission products of uranium rods during the first few weeks after their withdrawal from the reactor. The emissions from 133Ba and 137mBa as standards in g-spectrometry: Haissinsky, Adloff, Radiochemical Survey of the Elements (Elsevier, 1965) pp 12-14.

General Description

Barium alloy, pyrophoric is mixture of barium and other metals or nonmetallic elements to improve the specific usefulness of barium. Barium alloys are a solid and can ignite spontaneously in contact with air. Barium is toxic and products given off in fire could be very toxic.

Air & Water Reactions

Finely divided metal powder is pyrophoric, ignites spontaneously in air [Bretherick 1979 p. 170-171]. Alloys containing a substantial proportion of barium rapidly decomposed water. The heat of the reaction is sufficient that the evolved hydrogen may ignite [Lab. Govt. Chemist 1965].

Reactivity Profile

Alloys containing a substantial amount of barium react violently with acids [Lab. Gov. Chemist 1965].

Health Hazard

Fire will produce irritating, corrosive and/or toxic gases. Inhalation of decomposition products may cause severe injury or death. Contact with substance may cause severe burns to skin and eyes. Runoff from fire control may cause pollution.

Fire Hazard

Flammable/combustible material. May ignite on contact with moist air or moisture. May burn rapidly with flare-burning effect. Some react vigorously or explosively on contact with water. Some may decompose explosively when heated or involved in a fire. May re-ignite after fire is extinguished. Runoff may create fire or explosion hazard. Containers may explode when heated.

Purification Methods

Barium is cleaned by washing with diethyl ether to remove adhering paraffin, then filed in an argon-filled glove box, washed first with ethanol containing 2% conc HCl, then with dry ethanol. It is dried in a vacuum and stored under argon [Addison et al. J Chem Soc 3868 1962]. It has also been purified by double distillation under 10mm of argon pressure.

Barium Preparation Products And Raw materials

Raw materials

Preparation Products

Barium Suppliers

Global( 101)Suppliers
Supplier Tel Fax Email Country ProdList Advantage
Mainchem Co., Ltd.
+86-0592-6210733 CHINA 32765 55
J & K SCIENTIFIC LTD. 400-666-7788 +86-10-82848833
+86-10-82849933; China 96815 76
3B Pharmachem (Wuhan) International Co.,Ltd. 86-21-50328103 * 801、802、803、804 Mobile:18930552037
86-21-50328109 China 15940 69
Alfa Aesar 400-610-6006; 021-67582000
021-67582001/03/05 China 30308 84
Energy Chemical 021-58432009 / 400-005-6266
021-58436166-800 China 44192 61
Shanghai Hanhong Scientific Co.,Ltd. 021-54306202,021-54308259
+86-21-54291107 China 31110 64
Chengdu XiYa Chemical Technology Co., Ltd. 4008-626-111
028-84752058 China 9740 57
BEST-REAGENT 028-85973071 028-85973075
028-85973075 China 9968 57
Richest Group Limited +86 21 5017 5386/3175 7285/86/87/88/89
+86 21 6085 3086 China 13959 57
Beijing Yan Nuo XinCheng Chemical Co., Ltd. 86-10-82830276
86-10-82830276-1 China 289 62

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