Tellurium
Tellurium atomic absorption standard solution
CAS: 13494-80-9;13981-49-2
Molecular Formula: Te
Tellurium - Names and Identifiers
| Name | Tellurium atomic absorption standard solution |
| Synonyms | tellurium Tellunium TellurStcke TelluriumchunkN Tellurium powder TelluriumpiecesN hydrogen telluride TelluriumpowderNmesh Telluriumingotbrokenpieces Tellurium solution 1000 ppm Tellurium solution 10 000 ppm Tellurium atomic absorption standard solution |
| CAS | 13494-80-9 13981-49-2 |
| EINECS | 236-813-4 |
| InChI | InChI=1/Te |
| InChIKey | VTLHPSMQDDEFRU-UHFFFAOYSA-N |
Tellurium - Physico-chemical Properties
| Molecular Formula | Te |
| Molar Mass | 127.6 |
| Density | 6.24 g/mL at 25 °C (lit.) |
| Melting Point | 450 °C (lit.) |
| Boling Point | 990 °C (lit.) |
| Water Solubility | insoluble H2O, benzene, CS2 [MER06] |
| Vapor Presure | 0Pa at 25℃ |
| Appearance | Ash solid |
| Specific Gravity | 6.24 |
| Color | Silver-white |
| Exposure Limit | TLV-TWA 0.1 mg (Te)/m3 (ACGIH) PEL-TWA: 0.1 mg (Te)/m3 (OSHA) TWA 0.1 mg (Te)/m3 (NIOSH) . |
| Merck | 13,9201 |
| Storage Condition | Sealed in dry,Room Temperature |
| Sensitive | Easily absorbing moisture |
| MDL | MFCD00134062 |
| Physical and Chemical Properties | Character orthorhombic crystal system silver white crystal. melting point 452 ℃ boiling point 1390 ℃ relative density 6.25 solubility soluble in sulfuric acid, nitric acid, aqua regia, potassium cyanide, potassium hydroxide; Insoluble in cold water and hot water, carbon disulfide. |
| Use | Used as a ceramic and glass colorant, rubber curing agent, petroleum cracking catalyst, etc., also used in the system of Deci, alloy, is a promising semiconductor material For the preparation of tellurium compounds, also used as catalysts |
Tellurium - Risk and Safety
| Hazard Symbols | T - Toxic |
| Risk Codes | 25 - Toxic if swallowed |
| Safety Description | S45 - In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) S28A - |
| UN IDs | UN 3288 6.1/PG 3 |
| WGK Germany | 3 |
| RTECS | WY2625000 |
| TSCA | Yes |
| HS Code | 28045000 |
| Hazard Class | 8 |
| Packing Group | III |
| Toxicity | A member element of group IVa in the Periodic Table with both metallic and non-metallic properties. Tellurium compounds of biological interest include the elemental form, as well as compounds with valences of 12 (telluride), 14 (tellurite), and 16 (tellurate). Commercial applications of tellurium include its use as a coloring agent and as an alloy with other metals. Industrial hazards generally involve the volatile forms including tellurium dioxide and hydrogen telluride rather than the less toxic elemental form. Exposure to potassium tellurite may also occur; this compound is known to cause hemolysis of erythrocytes, probably via its reduction product, telluride. Other non-nervous system effects of exposure to tellurium compounds include weight loss, blue/ black discoloration of skin, and a characteristic garlic breath odor. Animal models have clearly implicated tellurium in induction of specific neuropathological findings. These include its action as a teratogen in the induction of communicating hydrocephalus (treated rats give rise to affected offspring), lipofuscinosis, and peripheral neuropathy. |
Tellurium - Nature
Open Data Verified Data
silver-white shiny rhombic crystals or black-colored to Brown amorphous powders. d (crystal) 6.1l ~ 6.27; Melting point 449.8 ℃, boiling point 989.9 ℃; Heat of fusion 4. 27kcal/molI expansion coefficient 16.8 × 10-6 ℃-1. Combustion in air produces a pale blue flame. Soluble in sulfuric acid, nitric acid and potassium cyanide solution, insoluble in water, benzene, carbon disulfide. React with concentrated sulfuric acid or nitric acid to produce a red solution, which can interact with halogen. When the powder is heated, exposed to open fire or exposed to oxidant, it will cause combustion explosion.
Last Update：2025-06-10 22:55:16
Tellurium - Preparation Method
Open Data Verified Data
High purity tellurium with purity of 99. 999% was obtained from tellurium powder by extracting and refining with sodium polysulfide.
Last Update：2025-06-10 22:55:16
Tellurium - Introduction
Soluble in sulfuric acid, nitric acid, aqua regia, potassium cyanide, potassium hydroxide; insoluble in cold water and hot water, carbon disulfide.
Last Update：2022-10-16 17:13:33
Tellurium - Application
Open Data Verified Data
high purity tellurium is mainly used for the preparation of CdTe, CdZnTe and other compound semiconductors, as thermoelectric conversion materials, infrared materials, solar cells, piezoelectric crystals and so on.
Last Update：2025-08-19 16:24:40
Tellurium - Safety
Open Data Verified Data
Toxic l rat oral LD0 83mg/kg. A large number of inhaled dust, can stimulate the upper respiratory tract inflammation, serious chemical Pneumonia. Rinse with running water. It should be stored in a cool, dry and ventilated warehouse, and should not be mixed with acids, oxidants and edible raw materials. When loading and unloading, it should be handled with care to prevent the rupture of the packaging bottle.
Last Update：2025-06-10 22:55:16
Tellurium - Reference Information
| resistivity (resistivity) | 5.8-33 μΩ-cm, 20°C |
| EPA chemical information | Information provided by: ofmpub.epa.gov (external link) |
| introduction | tellurium is L1 J discovered by Reichingstein in gold-containing ore in 1782. it is also said that tellurium was first discovered in a white metal by M.H. kalproz in 1798. Tellurium, selenium, rhenium, etc. are generally called "rare elements", "dispersed elements" or "scattered metals". Its average abundance value in the crust is very low (6 × 10-5). Tellurium and cadmium, germanium, gallium, selenium, indium, thallium, scandium, rhenium, etc. are all dispersed elements. In nature, in addition to natural tellurium, tellurium minerals are mainly composed of Au, Ag and platinum group elements, as well as metal elements such as Pb, Bi, Cu, Fe, Zn, and Ni to form tellurides, tellurium sulfur (selenium) compounds and Tellurium oxides and oxygen-containing salts and other mineral types L2 J. |
| Properties | Tellurium has two allotrope, one is a hexagonal crystal system, the atoms are arranged in a spiral shape, with silver-white metallic luster; the other is amorphous, black powder. Tellurium has a melting point of 452 ℃ and a boiling point of 1390 ℃. It is brittle and has similar chemical properties to antimony. Tellurium is soluble in sulfuric acid, nitric acid, aqua regia, potassium cyanide, potassium hydroxide; insoluble in water and carbon disulfide. Tellurium burns in the air with a blue flame to produce tellurium dioxide. |
| distribution of tellurium resources | the crustal abundance of tellurium is lx10-7%, and no independent industrial minerals with tellurium have been found. Tellurite resources are scattered and mostly associated with other minerals or exist in other minerals in the form of impurities. Dashuigou bismuth tellurium pyrite in Shimian County, Sichuan Province, China is the only "tellurium independent primary deposit" reported in the world so far, and is known as the "second national treasure" after the giant panda ". Tellurium is mainly symbiotic with pyrite, chalcopyrite, sphalerite, etc., with a content of only 0.001%-0.1%; the main tellurium minerals are lead tellurium, bismuth tellurite, bismuth tellurite, tellurium gold ore, tellurium copper ore Wait. The above minerals are rare and have no industrial value. |
| application | sparse element tellurium is known as "the vitamin of modern industry, national defense and cutting-edge technology, and the bridge to create miracles in the world" and "the supporting material of contemporary high-tech new materials". This is because with the increasing demand for dilute metals including tellurium in aerospace, atomic energy, electronics and other fields, tellurium has become a supporting material for new materials needed for electronic computers, communications and aerospace development, energy, medicine and health. |
| toxicity | highly toxic. Dust toxic, suction dust can cause dry mouth, release metallic taste, loss of appetite, salivation, nausea, vomiting, breathing with garlic and other symptoms. Patients who inhale dust should be removed from the contaminated area, placed to rest and keep warm. When the eyes are irritated, rinse with water and seek medical treatment. When contacting the skin, rinse with water and then wash thoroughly with soap. Wash your mouth immediately after taking it by mistake and send it to the hospital for treatment as soon as possible. |
| use | for semiconductor devices, alloys, chemical raw materials and cast iron, rubber, glass and other industries as additives. Used to prepare tellurium compounds. and used as a semiconductor research material. It is used for the preparation of tellurium compounds, and also used as a catalyst It is used as a colorant for ceramics and glass, a vulcanizing agent for rubber, a catalyst for petroleum cracking, etc., and is also used for making decyl and alloys. It is a very promising semiconductor material used for the preparation of tellurium compounds, and also used as a catalyst Tellurium added to steel can increase the ductility of steel; trace tellurium in cast iron can make the surface of castings hard and wear-resistant; tellurium is also used as a type for battery plate printing and a colorant for blue, brown and red glass. |
| production method | using tellurium powder as raw material and extracting and refining with sodium polysulfide, the purity of the prepared high purity tellurium is 99.999%. the calcined material containing tellurium anode mud obtained from copper electrolysis process is treated with alkali to prepare crude tellurite alkali solution (PH>10.8), and alkali sulfide is added to turn lead, copper, silver, iron, etc. into sulfide and precipitate and separate. The filtrate is neutralized with hydrochloric acid to precipitate tellurium dioxide. Filtering. Dissolve tellurium dioxide in 6 mol/L hydrochloric acid (the concentration of tellurium is 200g/L) and heat it to 90 ℃, add 13g of hydroxylamine hydrochloride to each liter of solution, filter and separate the impurity selenium precipitate, and pass the sulfur dioxide gas washed with water and dilute sulfuric acid into the above filtrate to precipitate tellurium, filter, wash with water, and dry to obtain tellurium, and then purify by sodium polysulfide extraction to obtain tellurium finished product. |
| category | toxic substances |
| toxicity classification | highly toxic |
| acute toxicity | abdominal cavity-rat LDL0: 200 mg/kg; Oral administration-guinea pig LD50: 45 mg/kg |
| explosive hazard characteristics | tellurium powder can be exploded when mixed with air |
| flammability hazard characteristics | high heat, open flame tellurium powder flammable produces toxic tellurium oxide smoke |
| storage and transportation characteristics | warehouse ventilation and low temperature drying; Store separately from oxidants and food additives |
| fire extinguishing agent | dry powder, sand |
| occupational standard | TLV-TWA 0.1 mg (tellurium)/m3; STEL 0.3 mg (tellurium)/m3 |
| toxic substance data | information provided by: pubchem.ncbi.nlm.nih.gov (external link) |
| immediate life-threatening and health concentration | 25 mg Te/m3 |
Last Update：2024-04-09 15:16:47
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