Selenium
Selenium
CAS: 7782-49-2;15758-45-9;19869-93-3
Molecular Formula: Se
Selenium - Names and Identifiers
| Name | Selenium |
| Synonyms | VANDEX selenide Selenium C.I. 77805 selenoprotein hydrogen selenide se-containing protein Selenium, isotope ofmass 79 |
| CAS | 7782-49-2 15758-45-9 19869-93-3 |
| EINECS | 231-957-4 |
| InChI | InChI=1/Se |
Selenium - Physico-chemical Properties
| Molecular Formula | Se |
| Molar Mass | 79.969 |
| Melting Point | 217℃ |
| Water Solubility | insoluble |
| Physical and Chemical Properties | Character Black gray hexagonal system metal. melting point 217 ℃ boiling point (684.9±1.0)℃ relative density 4.81 solubility: soluble in concentrated sulfuric acid, chloroform, slightly soluble in carbon disulfide, insoluble in water and ethanol. |
| Use | Used as selenium rectifier, selenium photosensitive plate, copying drum, refrigeration alloy, infrared material, photovoltaic cell, etc Used as a nitrogen catalyst, general analysis reagent |
Selenium - Risk and Safety
| Hazard Symbols | T - Toxic |
| Risk Codes | R23/25 - Toxic by inhalation and if swallowed. R33 - Danger of cumulative effects R53 - May cause long-term adverse effects in the aquatic environment |
| Safety Description | S45 - In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) S61 - Avoid release to the environment. Refer to special instructions / safety data sheets. |
| UN IDs | UN 3077 |
Selenium - Upstream Downstream Industry
| Raw Materials | sulfur dioxide Sodium sulfite Hydrochloric acid |
| Downstream Products | Sodium selenite,anhydrous Sodium selenite,anhydrous |
Selenium - Nature
Open Data Verified Data
solid with metallic luster. Insoluble in water, alcohol, soluble in sulfuric acid, nitric acid, alkali, carbon disulfide. Combustion at high temperatures. With strong acid, chlorate, metal, barium carbide, calcium carbide, cadmium, chromium trioxide, fluorine, lithium silicide, nickel, potassium, potassium bromate, sodium, strontium dioxide, severe reactions occur in contact with uranium and zinc.
Last Update：2025-06-10 22:55:16
Selenium - Preparation Method
Open Data Verified Data
High-purity selenium with purity of 99. 999% was obtained by zone melting with selenium as raw material.
Last Update：2025-06-10 22:55:16
Selenium - Application
Open Data Verified Data
high purity selenium is used to make various compound semiconductors such as ZnSe, and to make various Toner materials such as xerographic powder and various metal selenides.
Last Update：2025-08-19 16:24:40
Selenium - Safety
Open Data Verified Data
rat oral LDso:6700mg/kg. Selenium on the skin, mucous membranes have strong irritation, a large number of inhalation can cause acute poisoning. Should be stored in a cool, dry, ventilated warehouse, not with acid, alkali substances and other co-storage and mixed transport. 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
Selenium - Introduction
Selenium is a chemical element with the chemical symbol Se and atomic number 34. The following is a description of the nature, use, preparation and safety information of Selenium:
Nature:
- Selenium is a non-metallic element that is a gray solid at room temperature. Its appearance is similar to metal.
- Selenium is stable in the atmosphere, but it is easy to oxidize when heated. It can be dissolved in acid to generate Selenium ion.
-The electrical properties of Selenium make it useful in the manufacture of electronic devices.
Use:
- Selenium is widely used in photosensitive devices. Selenium, for example, is a material commonly found in sensors that can convert light signals into electrical signals.
- Selenium is also used to prepare various metal Selenium compounds, which have important applications in battery and solar cell technology and semiconductor material research.
Preparation Method:
- Selenium can be prepared by a variety of methods. One of the common methods is through the reaction of Selenium acid silver with hydrochloric acid to obtain Selenium silver precipitate, and then reduce it to obtain elemental Selenium.
The purity of-Selenium can be further improved by distillation or hydrogen reduction.
Safety Information:
- Selenium may be toxic to humans when ingested in large quantities or exposed for a long time. Therefore, when using Selenium or contact with Selenium-containing compounds, appropriate precautions should be taken and safe operating procedures should be followed.
-inhalation of Selenium particles can cause damage to the respiratory system. Exposure to Selenium compounds may cause eye and skin irritation.
-Waste Selenium compounds should follow proper waste disposal procedures to prevent pollution to the environment.
Nature:
- Selenium is a non-metallic element that is a gray solid at room temperature. Its appearance is similar to metal.
- Selenium is stable in the atmosphere, but it is easy to oxidize when heated. It can be dissolved in acid to generate Selenium ion.
-The electrical properties of Selenium make it useful in the manufacture of electronic devices.
Use:
- Selenium is widely used in photosensitive devices. Selenium, for example, is a material commonly found in sensors that can convert light signals into electrical signals.
- Selenium is also used to prepare various metal Selenium compounds, which have important applications in battery and solar cell technology and semiconductor material research.
Preparation Method:
- Selenium can be prepared by a variety of methods. One of the common methods is through the reaction of Selenium acid silver with hydrochloric acid to obtain Selenium silver precipitate, and then reduce it to obtain elemental Selenium.
The purity of-Selenium can be further improved by distillation or hydrogen reduction.
Safety Information:
- Selenium may be toxic to humans when ingested in large quantities or exposed for a long time. Therefore, when using Selenium or contact with Selenium-containing compounds, appropriate precautions should be taken and safe operating procedures should be followed.
-inhalation of Selenium particles can cause damage to the respiratory system. Exposure to Selenium compounds may cause eye and skin irritation.
-Waste Selenium compounds should follow proper waste disposal procedures to prevent pollution to the environment.
Last Update：2024-04-09 20:48:19
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Raw Materials for Selenium
Downstream Products for Selenium