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selenium powder selenium nano powder 99.99% 4n high purity with low price for sale
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| Post Date: | Aug 31,2016 |
| Expiry Date: | Feb 27,2017 |
| Detailed Description: |
Cas No. :7782-49-2
Quantity: 1000 Specs:4n Price:50-80 USD Kilograms Payment Method: L/C,D/A,D/P,T/T,Western Union,MoneyGram Quick Details Place of Origin: Hubei, China (Mainland) Brand Name: Wuhan Xinrong Model Number: 99.99% Application: Industry Shape: Powder Material: selenium Dimensions: Customzied Chemical Composition: 99.99%Min Purity: 99.99% Name: selenium powder Other name: selenium nano powder Usage: glass, metallurgical, agriculture and electronics Density: 4.79 gm/cc Grade: 4N grade Standard: In house 99.99% Min Color: Silver Grey Type: non ferrous material Size: 200 mesh Packaging & Delivery Packaging Details: Vacuum Packing or Nitrogen- Protecting 1kgs/Bag Delivery Detail: Shipped in 5 days after payment 1. 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 Applications: 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. 2. GENERAL PROPERTIES Symbol:Se CAS7782-49-2 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 3. Specification Se %99.99 min Cu0.0001max Hg0.0002 As0.0001 Sb0.0003max Te0.0001max Pb0.0003max Fe0.0009 Sn0.0001max Ni0.0001 Bi0.0001max Al0.0001max Si0.0002 S0.0003 |
| CAS Registry Number: | 7782-49-2 |
| Synonyms: | ;C.I. 77805;VANDEX;selenide; |
| Molecular Formula: | Se |
| Molecular Weight: | 78.96 |
| Molecular Structure: | 
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| Hazard Symbols: |  T:Toxic; |
| Risk Codes: | R23/25:; R33:; R53:; |
| Safety Description: | S20/21:; S28A:; S45:; S61:; |
| Company: | Wuhan Xinrong New Material Co.,Ltd [ China ] |
| Contact: | Kathy |
| Tel: | +86-027-86699856 |
| Fax: | 027-87868992 |
| Email: | sale05@91material.com |
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