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selenium powder selenium nano powder 99.99% 4n

Inquiry
  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: 7782-49-2 Selenium
  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
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