Thallium Ingot

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Thallium metal is soft gray metal, which exhibit a metallic luster when exposed to air, but soon it would develops a blusih-gray tinge.Thallium is a transition metal,which belong to main group metals according to periodic table of the elements. The +3 state resembles that of the other elements in the thallium’s group(boron, aluminum, gallium, indium). The +1 state, which is far more prominent in thallium than the elements above it, recalls the chemistry of alkali metals.Thallium occurs in crooksite, lorandite and hutchinsonite. It is also present in pyrites and is recovered from the roasting of this ore in connection with the production of sulfuric acid. Thallium is also obtained from the smelting of lead and zinc ore. Extraction is somewhat complex and depends on the source of thallium.
Basic InfoSynonym:Thallium,Thallium elementary , pure thallium, Tl 99.99%
CAS No.:7440-28-0
EINECS No.:231-138-1
MF:Tl
Molecular Weight:204.3833
Melting Point:302℃
Boiling Point:1457℃
Inchi:InChI=1S/Tl
Density:1.01 g/mL at 25℃
UN No.:UN3288 6.1/PG 2
Safety Instruction: Human poison by unspecified route. Human systemic effects by ingestion: nerve or sheath structural changes, extra-ocular muscle changes, sweating, and other effects. Flammable in the form of dust when exposed to heat or flame. Violent reaction with F2. When heated to decomposition it emits toxic fumes of Tl. Used as a rodenticide and fungicide, and in lenses and prisms, in high-density liquids. See also THALLIUM COMPOUNDS and POWDERED METALS.Analytical Methods: For occupational chemical analysis use NIOSH: Elements (ICP) 7300. It is also used in infrared detectors.
Packing Group:II
Risk Group:6.1
Specifications

Tl	Pb	Zn	Cu	Fe	Cd	In	Al	Si	Hg
99.99%	0.003%	0.001%	0.001%	0.001%	0.001%	0.0005%	0.001%	0.001%	0.002%

Applicationsthallium metal used in system for photoelectric tubes, industrial low temperature meter, optical glass, for purification, the manufacture of alloys, chemical reagents, instrumentation and semiconductor doping.Thallium has been used, with sulfur or selenium and arsenic, to produce low melting glass which become fluid between 125℃ and 150℃. These glasses have similar properties to ordinary glasses at room temperature and are said to be durable and insoluble in water. It has been used in treating ringworm and other skin infections; however, its use has been limited because of the narrow margin between toxicity and therapeutic benefits. Thallium is also used in semiconductor material for selenium rectifiers in gamma radiation detection equipment. It is used as high-density liquid used for sink-float separation of minerals. Using newly developed method of flame spectroscopy, thallium metal doped produces a notable green spectral line. Thallium metal tends to oxidize to the +3 and +1 oxidation states as ionic salts. Approximately 60-70% of thallium production is used in the electronic industry, and the remainder is used in the pharmaceutical industry and in glass manufacturing.
In addition, research activity with thallium is ongoing to develop high-temperature superconducting materials for such applications as magnetic resonance imaging, storage of magnetic energy, magnetic propulision, and electric power generation and transmission. Thallium metal could be used in solution of plating gold and palladium, which affect mechanism of plating gold and palladium and improve technology of electroplating solution.

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