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| CAS No.: | 13494-80-9 |
|---|---|
| Name: | Tellurium |
| Molecular Structure: | |
|
|
|
| Formula: | Te |
| Molecular Weight: | 129.616 |
| Synonyms: | Telluriumelement; |
| EINECS: | 236-813-4 |
| Density: | 6.24 g/cm3 |
| Melting Point: | 722.66 K,?449.51 °C,?841.12 °F |
| Boiling Point: | 1261 K,?988 °C,?1810 °F |
| Solubility: | insoluble H2O, benzene, CS2 [MER06] |
| Appearance: | solid |
| Hazard Symbols: |
 T
|
| Risk Codes: | 25 |
| Safety: | S45 |
| PSA: | 0.00000 |
| LogP: | -0.15580 |
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| Conditions | Yield |
|---|---|
| In gas other Radiation; Laser thermochemical synthesis of gaseous TeH2 from gaseous H and Te atoms.; | 100% |
| In neat (no solvent) quick reaction of atomic hydrogen with a Te mirror at -10°C;; | |
| In neat (no solvent) Kinetics; |
- 13494-80-9
hydrogen telluride
| Conditions | Yield |
|---|---|
| In hydrogenchloride addn. of pure Al2Te3 (from Te vapor and heated Al) into excess of 4n HCl soln. free of air in special app. under exclusion of O2, moisture and light; gas with 40% H2Te;; | 80% |
| In hydrogenchloride addn. of pure Al2Te3 (from Te vapor and heated Al) into excess of 4n HCl soln. free of air in special app. under exclusion of O2, moisture and light; gas with 40% H2Te;; | 80% |
| In sulfuric acid addn. of pure Al2Te3 (from Te vapor and heated Al) into excess of 4n H2SO4 soln. free of air in special app. under exclusion of O2, moisture and light; gas with 40% H2Te;; | 76% |
| Conditions | Yield |
|---|---|
| In not given byproducts: H2; reactn. with acids;; | 8.3% |
| In not given byproducts: H2; reactn. with acids;; | 8.3% |
| In not given byproducts: H2; reactn. with acids;; | |
| In not given byproducts: H2; reactn. with acids;; |
| Conditions | Yield |
|---|---|
| In water | |
| In water react. of excess Al2Te3 with 0.5 M H2SO4 in N2 atm.; | |
| In sulfuric acid H2Te gas generated by addn. of 0.5 M H2SO4 to Al2Te3 under N2 atm.; |
| Conditions | Yield |
|---|---|
| With acetic acid In not given between pH= 4.2-5.5; | |
| With NH4-acetae; acetic acid In not given between pH= 4.2-5.5; |
| Conditions | Yield |
|---|---|
| With hydrogen In neat (no solvent) on heating in stream of H2; at the end of reaction very slowly, complete after some days;; | A n/a B 0% |
| With H2 In neat (no solvent) on heating in stream of H2; at the end of reaction very slowly, complete after some days;; | A n/a B 0% |
- 13494-80-9
hydrogen telluride
| Conditions | Yield |
|---|---|
| With titanium(III) chloride In not given freshly pptd. Te;; | |
| electrochemical reduction of elemental tellurium in acidic soln.; | |
| With zinc In sulfuric acid reduction of dild. H2SO4 containing Te with Zn;; |
| Conditions | Yield |
|---|---|
| In neat (no solvent) byproducts: arsenic telluride; Irradiation (UV/VIS); passing AsH3 over powdered Te in sun light;; pptn. of arsenic telluride;; |
| Conditions | Yield |
|---|---|
| In neat (no solvent) byproducts: antimony telluride; Irradiation (UV/VIS); passing AsH3 over powdered Te in sun light;; pptn. of antimony telluride;; |
- 16940-66-2
sodium tetrahydroborate
- 13494-80-9
hydrogen telluride
| Conditions | Yield |
|---|---|
| With Te(IV)-compd. In water | |
| With Te(IV)-compd. In water |
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History
In 1789,another Hungarian scientist Pál Kitaibel also discovered the element independently.
In 1798, TELLURIUM(13494-80-9) was named by Martin Heinrich Klaproth.
Consensus Reports
Standards and Recommendations
ACGIH TLV: TWA 0.1 mg(Te)/m3
DFG MAK: 0.1 mg/m3
NIOSH REL: (Tellurium and Compounds) TWA 0.1 mg/m3
Analytical Methods
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. |