selenium powder selenium nano powder 99.99% 4n high purity with low price for sale

• 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:

  

• 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