Selenium Metal
MATERIAL OVERVIEW
Characteristics: Amorphous red powder, becoming black on standing and crystalline on heating; vitreous and colloidal forms may be prepared. Amorphous form softens at 40 °C and melts at 217 °C. It rarely occurs in its elemental state in nature, or as pure ore compounds. Soluble in concentrated nitric acid and in (liquid form) common alkalies. Forms binary alloys with silver, copper, zinc, lead, etc. Low toxicity. A necessary nutritional factor for animals.
Hazards: Selenium salts are toxic in large amounts, but trace amounts are necessary for cellular function.
Application: Selenium could be used in different fields, according to its purity. Selenium is now used in a variety of applications, from glass and metallurgical applications to pigments, agriculture and electronics.
Selenium and series products from Wuhan Xinrong
| Material name | Purity | size |
| High purity Selenium | 5N-6N |
|
| Selenium Powder | 4N | 40-300 mesh |
| Selenium Dioxide | 4N |
|
Selenium shape and purity could be customized by customer request
Packing: After being packed in polyester films, then packed in plastic films or glass tubes in vacuum.
GENERAL PROPERTIE
| Symbol: | Se |
| CAS | 7782-49-2 |
| Atomic Number: | 34 |
| Atomic Weight: | 78.96 |
| Density: | 4.79 gm/cc |
| Melting Point: | 217 oC |
| Boiling Point: | 684.9 oC |
| Thermal Conductivity: | 0.00519 W/cm/K @ 298.2 K |
| Electrical Resistivity: | 106 microhm-cm @ 0 oC |
| Electronegativity: | 2.4 Paulings |
| Specific Heat: | 0.767 Cal/g/K @ 25 oC |
| Heat of Vaporization: | 3.34 K-cal/gm atom at 684.9 oC |
| Heat of Fusion: | 1.22 Cal/gm mole |
TYPICAL ANALYSES
Impurities in ppm
| Material / Purity: | 5N |
| As | <1 |
| Cu | <1 |
| Te | <1 |
