selenium powder selenium nano powder 99.99% 4n

• Post Date:

  Sep 01,2016

• Expiry Date:

  Nov 30,2016

• Detailed Description:

  Cas No. :7782-49-2 Quantity: 1000Kilograms
  Specs:4n
  Price:50-80 USD Kilograms
  Payment Method: L/C,D/A,D/P,T/T,Western Union,MoneyGram
  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
  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
  
  
  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

• CAS Registry Number:

  7782-49-2

• Synonyms:

  ;C.I. 77805;VANDEX;selenide;

• Molecular Formula:

  Se

• Molecular Weight:

  78.96

• Molecular Structure:

  

• Hazard Symbols:

   T:Toxic;
  

• Risk Codes:

  R23/25:;
  R33:;
  R53:;
  

• Safety Description:

  S20/21:;
  S28A:;
  S45:;
  S61:;
  

• Company:

  Wuhan Xinrong New MaterialsCo.,Ltd         

• Contact:

  KathySalvatore

• Tel:

  +86/027-83952355

• Fax:

  86-027-87868992

• Email:

  sale05@91material.com