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Tellurium

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Name

Tellurium

EINECS 236-813-4
CAS No. 13494-80-9 Density 6.24 g/cm3
Solubility Melting Point 722.66 K,?449.51 °C,?841.12 °F
Formula Te Boiling Point 1261 K,?988 °C,?1810 °F
Molecular Weight 127.6 Flash Point
Transport Information Appearance solid
Safety S45 Risk Codes 25
Molecular Structure Molecular Structure of 13494-80-9 (Tellurium) Hazard Symbols ToxicT
Synonyms

Telluriumelement;

 

Tellurium History

In 1782,TELLURIUM(13494-80-9) was fist discovered  by the Hungarian Franz-Joseph Müller von Reichenstein in Nagyszeben Transylvania.
In 1789,another Hungarian scientist Pál Kitaibel also discovered the element independently.
In 1798, TELLURIUM(13494-80-9) was named by Martin Heinrich Klaproth.

Tellurium Consensus Reports

Reported in EPA TSCA Inventory.

Tellurium Standards and Recommendations

OSHA PEL: TWA 0.1 mg(Te)/m3
ACGIH TLV: TWA 0.1 mg(Te)/m3
DFG MAK: 0.1 mg/m3
NIOSH REL: (Tellurium and Compounds) TWA 0.1 mg/m3

Tellurium Analytical Methods

For occupational chemical analysis use NIOSH: Elements (ICP) 7300.

Tellurium Specification

The Tellurium, with the cas registry number 13494-80-9, is a kind of silvery white crystalline solid. Being soluble in sulfuric acid, nitric acid, aqua regia, potassium cyanide, potassium hydroxide while insoluble in cold and hot water and carbon disulfide, this chemical could reacts with nitric acid and concentrated sulfuric acid with the form of red solution. Besides, it could dissolves in potassium hydroxide in the presence of air with formation of deep red solution. In addition, its product categories are including Inorganics; Electronic Chemicals; Micro/Nanoelectronics; Pure Elements; Metal and Ceramic Science; Metals; Tellurium.

Physical properties about Tellurium are: (1)#H bond acceptors: 0; (2)#H bond donors: 0; (3)#Freely Rotating Bonds: 0; (4)Polar Surface Area: 0; (5)Exact Mass: 129.906223; (6)MonoIsotopic Mass: 129.906223; (7)Heavy Atom Count: 1; (8)Covalently-Bonded Unit Count: 1.

Preparation of Tellurium: First prepare the raw material of Tellurium powder, and then extract and refine with sodium polysulfide to get this product with the purity of 99.999%.

Uses of Tellurium: As to its usage, it is widely applied in many ways. It could be used as a chemical bonder in producing the outer shell of the first atom bomb and also in the fileds of thermoelectricity and free-machining steel; It could then be used as the colorant for ceramics and glass, vulcanized agent of rubber, catalytic agent for petroleum cracking process.

When you are dealing with this chemical, you should be careful. For being a kind of toxic chemical, it will at low levels cause damage to health. If swallowed, it is also very toxic. Therefore, if in case of accident or if you feel unwell seek medical advice immediately (show the label where possible).

You can still convert the following datas into molecular structure:
(1)Canonical SMILES: [Te]
(2)InChI: InChI=1S/Te
(3)InChIKey: PORWMNRCUJJQNO-UHFFFAOYSA-N 

The toxicity data is as follows:

Organism Test Type Route Reported Dose (Normalized Dose) Effect Source
guinea pig LD50 oral 45mg/kg (45mg/kg)   "Toxicometric Parameters of Industrial Toxic Chemicals Under Single Exposure," Izmerov, N.F., et al., Moscow, Centre of International Projects, GKNT, 1982Vol. -, Pg. 107, 1982.
mouse LD50 oral 20mg/kg (20mg/kg)   "Toxicometric Parameters of Industrial Toxic Chemicals Under Single Exposure," Izmerov, N.F., et al., Moscow, Centre of International Projects, GKNT, 1982Vol. -, Pg. 107, 1982.
rabbit LD50 oral 67mg/kg (67mg/kg)   "Toxicometric Parameters of Industrial Toxic Chemicals Under Single Exposure," Izmerov, N.F., et al., Moscow, Centre of International Projects, GKNT, 1982Vol. -, Pg. 107, 1982.
rat LC50 inhalation > 2420mg/m3/4H (2420mg/m3)   TNO-report. Vol. TNO-92-008,
rat LC50 inhalation > 2420mg/m3/4H (2420mg/m3) LUNGS, THORAX, OR RESPIRATION: OTHER CHANGES TNO-report. Vol. TNO-92-008,
rat LD50 oral 83mg/kg (83mg/kg)   "Toxicometric Parameters of Industrial Toxic Chemicals Under Single Exposure," Izmerov, N.F., et al., Moscow, Centre of International Projects, GKNT, 1982Vol. -, Pg. 107, 1982.
rat LDLo intratracheal 200mg/kg (200mg/kg) KIDNEY, URETER, AND BLADDER: OTHER CHANGES 

LUNGS, THORAX, OR RESPIRATION: OTHER CHANGES

LIVER: OTHER CHANGES
American Industrial Hygiene Association Journal. Vol. 39, Pg. 100, 1978.

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