Aluminum selenide (Al2Se3)
Aluminum selenide
CAS: 1302-82-5
Molecular Formula: Al2Se3
Aluminum selenide (Al2Se3) - Names and Identifiers
| Name | Aluminum selenide |
| Synonyms | ALUMINUM SELENIDE Aluminum selenide Aluminium selenide Dialuminum triselenide dialuminum selenium(2-) Aluminum sesquiselenide Aluminum selenide (Al2Se3) Aluminiumselenide,metalsbasis |
| CAS | 1302-82-5 |
| EINECS | 215-110-6 |
| InChI | InChI=1/2Al.3Se/q2*+3;3*-2 |
Aluminum selenide (Al2Se3) - Physico-chemical Properties
| Molecular Formula | Al2Se3 |
| Molar Mass | 290.84 |
| Density | 3,437 g/cm3 |
| Melting Point | 960°C |
| Water Solubility | Decomposes to Al{2}0{3} and SeO{2} in water |
| Appearance | Pieces |
| Specific Gravity | 3.437 |
| Color | Pale brown |
| Exposure Limit | ACGIH: TWA 0.2 mg/m3NIOSH: IDLH 1 mg/m3; TWA 0.2 mg/m3 |
| Solubility Product Constant(Ksp) | pKsp: 24.4 |
| Sensitive | Moisture Sensitive |
Aluminum selenide (Al2Se3) - Risk and Safety
| Risk Codes | R23/25 - Toxic by inhalation and if swallowed. R33 - Danger of cumulative effects R50/53 - Very toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment. |
| Safety Description | S20/21 - S28 - After contact with skin, wash immediately with plenty of soap-suds. S45 - In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) |
| UN IDs | 3283 |
| TSCA | Yes |
| Hazard Class | 6.1 |
| Packing Group | II |
Aluminum selenide (Al2Se3) - Reference Information
| crystal Structure | Hexagonal, Wurtzite (Zincite) Structure - Space Group P 63mc |
| EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
| Use | aluminum selenide is a brown powder with a relative density of 3.437 and insoluble in acid. Aluminum selenide is unstable in the air, such as meeting with moisture on the decomposition of hydrogen selenide and aluminum hydroxide. Preparation Method: using aluminum and selenium in vacuum heating reaction. Purposes: for the production of hydrogen selenide and semiconductor research. |
| Application | aluminum selenide can be used to prepare hydrogen selenide. Hydrogen selenide is a serious toxic gas that can be liquefied and is filled with a cylinder. Hydrogen selenide gas is mainly used for the synthesis of inorganic or organic selenium-containing compounds and the preparation of metallic selenium. High purity hydrogen selenide is a semiconductor doping gas and a precursor for copper-indium-selenium solar cells. The preparation method is as follows: the raw material aluminum selenide Al2Se3 reacts with water H2O to generate hydrogen selenide H2Se, and the water in the H2Se gas is removed by condensation; It is characterized: continue to use the adsorber containing aluminum selenide particles to adsorb the water in the residual H2Se gas. After deep drying of the H2Se gas, the H2Se gas enters the cylinder for condensation and liquefaction, exclusion of non-condensable gas impurities dissolved in the liquid; Close the cylinder valve to obtain purified hydrogen selenide directly contained in the cylinder. The technical methods adopted for the purification and filling of hydrogen selenide gas are as follows: aluminum selenide Al2Se3 reacts with water H2O to generate hydrogen selenide H2Se, and the H2Se gas is condensed to remove water below the dew point temperature of water; continue to absorb residual moisture with aluminum selenide particles, so that the gas is deeply dried; Then, H2Se is liquefied at low temperature in the cylinder; After completion of a batch of filling, the gas cylinder filled with liquid H2Se is gently evacuated under a low-temperature cold bath to remove non-condensable gas dissolved in the liquid; Finally, the cylinder valve is closed to complete all purification and filling operations of the batch. The adsorbent that adsorbs water and reacts with water is taken out and then used as a raw material aluminum selenide Al2Se3 reacts with water H2O to generate hydrogen selenide H2Se. |
Last Update：2024-04-10 22:29:15
