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TANTALUM

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CAS:7440-25-7
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CAS:7440-25-7
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CAS:7440-25-7
Purity:99% HPLC Package:1Mg ; 5Mg;10Mg ;100Mg;250Mg ;500Mg ;1g;2.5g ;5g ;10g
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CAS:7440-25-7
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Products Intro: Product Name:TANTALUM
CAS:7440-25-7
Purity:99.90% Package:1300RMB/100g Remarks:HWG21717
TANTALUM Basic information
History Uses Reactions
Product Name:TANTALUM
Synonyms:TANTALUM TUBING;TANTALUM STANDARD;TANTALUM SINGLE ELEMENT PLASMA STANDARD;TANTALUM SINGLE ELEMENT STANDARD;TANTALUM;TANTALUM ICP STANDARD;Tantalum rod (99.95%);Tantalum wire (99.95%)
CAS:7440-25-7
MF:Ta
MW:180.95
EINECS:231-135-5
Product Categories:Inorganics;metal or element;TantalumMetal and Ceramic Science;Catalysis and Inorganic Chemistry;Chemical Synthesis;Metal and Ceramic Science;Metals;Tantalum;73: Ta;TantalumNanomaterials;Materials Science;Nanomaterials;Nanoparticles: Metals and Metal AlloysMetal and Ceramic Science;Nanopowders and Nanoparticle Dispersions
Mol File:7440-25-7.mol
TANTALUM Structure
TANTALUM Chemical Properties
Melting point 2996 °C(lit.)
Boiling point 5425 °C(lit.)
density 16.69 g/cm 3 (lit.)
vapor pressure <0.01 mm Hg ( 537.2 °C)
form wire
color Gray to silver
Water Solubility very resistant to attack by acids except HF, resistant to alkali solutions [KIR83]
Merck 13,9143
Stability:Stable. Powder is very flamable.
CAS DataBase Reference7440-25-7(CAS DataBase Reference)
Safety Information
Hazard Codes F,Xi,Xn,C
Risk Statements 11-36/37/38-20/21/22-40-34-36/38
Safety Statements 16-26-33-36/37/39-36-45-27-36/37
RIDADR UN 3089 4.1/PG 2
WGK Germany -
RTECS WW5505000
TSCA Yes
HazardClass 4.1
PackingGroup II
MSDS Information
ProviderLanguage
ACROS English
SigmaAldrich English
ALFA English
TANTALUM Usage And Synthesis
HistoryTantalum was discovered by the Swedish chemist Anders Ekeberg in 1802, although for a long time after his discovery many chemists believed tantalum and niobium were the same element. In 1866, Marignac developed a fractional crystallization method for separation of tantalum from niobium. Ekeberg named the element in honor of Tantalus, who was Niobe’s father in Greek mythology.
Tantalum is never found in nature in free elemental form. The most important mineral is columbite-tantalite (Fe,Mn) (Nb,Ta)2O6. Tantalum also is found in minor quantities in minerals pyrochlore, samarskite, euexenite, and fergusonite. The abundance of tantalum in the earth’s crust is estimated as 2 mg/kg.
Tantalum and its alloys have high melting points, high strength and ductility and show excellent resistance to chemical attack. Tantalum carbide graphite composite is one of the hardest substances ever made and has a melting point over 6,700°C. The pure metal is ductile and can be drawn into fine wire, which is used as filament for evaporating aluminum and other metals.
UsesTantalum filaments were used in incandescent lamp bulbs before tungsten replaced them. At temperatures below 150°C, tantalum is attacked only by hydrofluoric acid, fluoride ion in acidic solutions, and free sulfur trioxide. It also is attacked, but slowly, by alkalies. Tantalum and its alloys, therefore, are used to build reactors, vessels, and cruicibles for preparing and carrying out reactions involving many reactive intermediates. The metal and its alloys are used to construct furnace parts, electrolytic capacitors, aircraft and missile parts, chemical process equipment, and nuclear reactors. Being nonreactive to body fluids and a nonirritant to body tissues, tantalum is used in making surgical appliances. Plate and sheet tantalum are applied in bone repair, foil and wire for nerve repair, and plate, gauge, and sheet for repair of abdominal muscle. Tantalum oxide is used to produce optical glasses of high refractive index. The oxide film on the metal makes it a rectifier for converting alternating current to direct current.
ReactionsThe most common oxidation state of tantalum is +5 and its aqueous solution chemistry is that of its pentavalent ion Ta5+. Ta metal forms a pentavalent oxide, tantalum pentoxide, Ta2O5, on heating with oxygen. However, at ordinary temperatures a thin layer of oxide covering the metal surface protects tantalum from most chemical attacks. The metal is attacked by hydrofluoric acid below 150°C. It also is dissolved by hot fuming sulfuric acid. It reacts with fluorine and chlorine on heating, forming tantalum pentafluoride, TaF5, and pentachloride, TaCl5, respectively. The metal is immune to dilute aqueous alkalies but is attacked slowly by concentrated fused alkalies. It combines with molecular hydrogen above 250°C. The hydride formed decomposes on heating above 800°C in vacuum. Tantalum forms alloys with several metals.
Chemical PropertiesTantalum is a refractory metal in Group V-B of the periodic table. The pure metal is ductile, steel-blue to gray solid or black, odorless powder.
HistoryDiscovered in 1802 by Ekeberg, but many chemists thought niobium and tantalum were identical elements until Rose, in 1844, and Marignac, in 1866, showed that niobic and tantalic acids were two different acids. The early investigators only isolated the impure metal. The first relatively pure ductile tantalum was produced by von Bolton in 1903. Tantalum occurs principally in the mineral columbite-tantalite (Fe, Mn)(Nb, Ta)2O6. Tantalum ores are found in Australia, Brazil, Rwanda, Zimbabwe, Congo- Kinshasa, Nigeria, and Canada. Separation of tantalum from niobium requires several complicated steps. Several methods are used to commercially produce the element, including electrolysis of molten potassium fluorotantalate, reduction of potassium fluorotantalate with sodium, or reacting tantalum carbide with tantalum oxide. Thirty-four isotopes and isomers of tantalum are known to exist. Natural tantalum contains two isotopes, one of which is radioactive with a very long half-life. Tantalum is a gray, heavy, and very hard metal. When pure, it is ductile and can be drawn into fine wire, which is used as a filament for evaporating metals such as aluminum. Tantalum is almost completely immune to chemical attack at temperatures below 150°C, and is attacked only by hydrofluoric acid, acidic solutions containing the fluoride ion, and free sulfur trioxide. Alkalis attack it only slowly. At high temperatures, tantalum becomes much more reactive. The element has a melting point exceeded only by tungsten and rhenium. Tantalum is used to make a variety of alloys with desirable properties such as high melting point, high strength, good ductility, etc. Scientists at Los Alamos have produced a tantalum carbide graphite composite material that is said to be one of the hardest materials ever made. The compound has a melting point of 3738°C. Tantalum has good “gettering” ability at high temperatures, and tantalum oxide films are stable and have good rectifying and dielectric properties. Tantalum is used to make electrolytic capacitors and vacuum furnace parts, which account for about 60% of its use. The metal is also widely used to fabricate chemical process equipment, nuclear reactors, and aircraft and missile parts. Tantalum is completely immune to body liquids and is a nonirritating metal. It has, therefore, found wide use in making surgical appliances. Tantalum oxide is used to make special glass with a high index of refraction for camera lenses. The metal has many other uses. The price of (99.9%) tantalum is about $2/g.
UsesIn pen points; analytical weights; apparatus and instruments for chemical, surgical, and dental use instead of platinum, in tantalum capacitors (a type of electrolytic condenser, trademarked "Tantalytic").
DefinitionElement of atomic number 73 in group VB of the periodic table, aw 180.9479, valences of 2, 3, 5; no stable isotopes.
General DescriptionTantalum dust is a black odorless powder. Mp: 2996°C; bp: approx. 5250°C. Density: 16.65 g cm-3. Insoluble in water. Tantalum oxide dust is a white, microcrystalline powder Mp: 1800°C. Density: 7.6 g cm-3. Insoluble in water. The mixture is listed as a toxic inhalation hazard by OHSA.
HazardDust or powder may be flammable. Toxic by inhalation.
Safety ProfileAn inhalation hazard. Some industrial skin injuries from tantalum have been reported. Systemic industrial poisoning, however, is apparently unknown. Questionable carcinogen with experimental tumorigenic data. The dry powder iptes spontaneously in air. Incompatible with bromine trifluoride, fluorine, lead chromate. See also specific tantalum compounds.
First aidIf this chemical gets into the eyes, remove any contact lenses at once and irrigate immediately for at least 15 minutes, occasionally lifting upper and lower lids. Seek medical attention immediately. If this chemical contacts the skin, remove contaminated clothing and wash immediately with soap and water. Seek medical attention immediately. If this chemical has been inhaled, remove from exposure,begin rescue breathing (using universal precautions, including resuscitation mask) if breathing has stopped and CPR if heart action has stopped. Transfer promptly to a medical facility. When this chemical has been swallowed, get medical attention. Give large quantities of water and induce vomiting. Do not make an unconscious person vomit.
ShippingUN3089 Metal powders, flammable, n.o.s., Hazard Class: 4.1; Labels: 4.1-Flammable solid.
IncompatibilitiesA flammable solid; the dry powder can ignite spontaneously in air. Incompatible with lead chromate. A strong reducing agent; incompatible with oxidizers (chlorates, nitrates, peroxides, permanganates, perchlorates, chlorine, bromine, bromine trifluoride, fluorine, etc.); contact may cause fires or explosions. Keep away from alkaline materials, strong bases, strong acids, oxoacids, epoxides. Tantalum metal is attacked by hydrogen fluoride, fused alkalis, fuming sulfuric acid.
Waste DisposalSanitary landfill if necessary; recover if possible because of economic value. Technology exists for tantalum recovery from spent catalysts, for example.
TANTALUM Preparation Products And Raw materials
Preparation Productsbastnasite-->Methacrylonitrile-->TANTALUM PENTAFLUORIDE-->TANTALUM(V) OXIDE
Tag:TANTALUM(7440-25-7) Related Product Information
72105 TANTALUM PENTOXIDE ON TANTALUM FO TANTALUM OXIDE (TA2O5) 99.95% 5G TANTALUM SLUG, 6.35MM (0.25IN) DIA X 6.35MM (0.25IN) LENGTH, 99.95% (METALS BASIS) ICP-MS TANTALUM STANDARD BARIUM MAGNESIUM TANTALUM OXIDE TANTALUM SPUTTERING TARGET, 76.2MM (3.0IN) DIA X 3.18MM (0.125IN) THICK, 99.95% (METALS BASIS EXCLUDING NB) TANTALUM POWDER, -325 MESH, PURATRONIC®, 99.97% (METALS BASIS), NB 50PPM TANTALUM TANTALUM TELLURIDE TANTALUM(V) CHLORIDE Tantalum carbide TANTALUM ETHOXIDE TANTALUM (V) BROMIDE ammonium hexafluorotantalate(5) Tantalum oxide (Ta2O5),Tantalum penta oxide CADMIUM TANTALATE(META) TANTALUM PENTAFLUORIDE POTASSIUM HEPTAFLUOROTANTALATE(V)