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Tantalum Manufacturer/High quality/Best price/In stock
Cas No: 7440-25-7
USD $ 3.0-3.0 / Kilogram 1 Kilogram 1-100 Metric Ton/Month Hangzhou Dayangchem Co., Ltd. Contact Supplier
TANTALUM
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No Data No Data 10 Metric Ton/Month Hebei yanxi chemical co.,LTD. Contact Supplier
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No Data 1 Gram 300 Kilogram/Month HENAN SUNLAKE ENTERPRISE CORPORATION Contact Supplier
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No Data 1 Metric Ton 1 Metric Ton/Day Henan Tianfu Chemical Co., Ltd. Contact Supplier
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USD $ 1000.0-1000.0 / Kilogram 1 Kilogram 100 Gram/Day Weifang Tansen Yiang international trading co., LTD Contact Supplier
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USD $ 0.0-1.0 / Kilogram 1 Kilogram 1000 Kilogram/Month Hebei Ruishun Trade Co.,Ltd Contact Supplier
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7440-25-7 Usage

Definition

Element of atomic number 73 in group VB of the periodic table, aw 180.9479, valences of 2, 3, 5; no stable isotopes.

Hazard

Dust or powder may be flammable. Toxic by inhalation.

Uses

Tantalum 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.

History

Tantalum 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.

Reactions

The 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.

General Description

Tantalum 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.

Uses

In 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").

Chemical Properties

solid
InChI:InChI=1/Ta

7440-25-7 Well-known Company Product Price

Brand (Code)Product description CAS number Packaging Price Detail
Aldrich (767514)  Tantalum  sputtering target, diam. × thickness 2.00 in. × 0.25 in., 99.95% trace metals basis 7440-25-7 767514-1EA 7,283.25CNY Detail
Aldrich (357006)  Tantalum  wire, diam. 0.5 mm, ≥99.9% trace metals basis 7440-25-7 357006-3.3G 425.88CNY Detail
Aldrich (357006)  Tantalum  wire, diam. 0.5 mm, ≥99.9% trace metals basis 7440-25-7 357006-1EA 470.34CNY Detail
Aldrich (262862)  Tantalum  wire, diam. 1.0 mm, ≥99.9% trace metals basis 7440-25-7 262862-13G 1,174.68CNY Detail
Aldrich (356980)  Tantalum  rod, diam. 3.2 mm, ≥99.9% trace metals basis 7440-25-7 356980-6.5G 1,411.02CNY Detail
Aldrich (262854)  Tantalum  rod, diam. 6.35 mm, ≥99.9% trace metals basis 7440-25-7 262854-125G 8,330.40CNY Detail
Aldrich (262854)  Tantalum  rod, diam. 6.35 mm, ≥99.9% trace metals basis 7440-25-7 262854-25G 2,347.02CNY Detail
Aldrich (262846)  Tantalum  powder, −325 mesh, 99.9% trace metals basis 7440-25-7 262846-100G 5,019.30CNY Detail
Aldrich (262846)  Tantalum  powder, −325 mesh, 99.9% trace metals basis 7440-25-7 262846-25G 1,688.31CNY Detail
Aldrich (262919)  Tantalum  foil, thickness 0.025 mm, ≥99.9% trace metals basis 7440-25-7 262919-750CM2 4,632.03CNY Detail
Aldrich (262919)  Tantalum  foil, thickness 0.025 mm, ≥99.9% trace metals basis 7440-25-7 262919-31G 4,197.96CNY Detail
Aldrich (262919)  Tantalum  foil, thickness 0.025 mm, ≥99.9% trace metals basis 7440-25-7 262919-9G 1,648.53CNY Detail

7440-25-7SDS

SAFETY DATA SHEETS

According to Globally Harmonized System of Classification and Labelling of Chemicals (GHS) - Sixth revised edition

Version: 1.0

Creation Date: Aug 16, 2017

Revision Date: Aug 16, 2017

1.Identification

1.1 GHS Product identifier

Product name tantalum atom

1.2 Other means of identification

Product number -
Other names TANTALUM

1.3 Recommended use of the chemical and restrictions on use

Identified uses For industry use only.
Uses advised against no data available

1.4 Supplier's details

1.5 Emergency phone number

Emergency phone number -
Service hours Monday to Friday, 9am-5pm (Standard time zone: UTC/GMT +8 hours).

More Details:7440-25-7 SDS

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