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

Inquiry
  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: 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 Material Co.,Ltd     [ China ]        
  Contact: Kathy
  Tel: +86-027-86699856
  Fax: 027-87868992
  Email: sale05@91material.com
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