Arsenic
MATERIAL OVERVIEW
Characteristics: Silver-gray brittle, crystalline solid that darkens in moist air. Allotropic forms: black, amorphous solid (beta-arsenic); yellow, crystalline solid. Mohs hardness 3.5; insoluble in water, caustic and nonoxidizing acids. Attacked by HCl in presence of oxidant. Reacts with nitric acid. Low thermal conductivity; a semiconductor.
Derivation: Flue dust from smelting of copper, gold and lead, from which white arsenic (arsenic trioxide) is obtained as a byproduct, in varying degrees of purity. This is reduced with charcoal. Arsenic is no longer produced in the U.S.
Hazard: Arsenic and inorganic arsenic compounds are toxic by ingestion and inhalation. A known carcinogen. Exposure limits: 0.01 mg/m3 of air.
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GENERAL PROPERTIES
| Symbol: | As |
| Atomic Number: | 33 |
| Atomic Weight: | 74.9216 |
| Density: | 5.73gm/cc |
| Melting Point: | 817 oC (28 Atm) |
| Boiling Point: | 613 oC subl. |
| Thermal Conductivity: | 0.502 W/cm/K @ 298.2 K |
| Electrical Resistivity: | 33.3 microhm-cm @ 20 oC |
| Electronegativity: | 2.0 Paulings |
| Specific Heat: | 0.0785 Cal/g/K @ 25 oC |
| Heat of Vaporization: | 7.75 K-cal/gm atom at 2467 oC |
| Heat of Fusion: | 6.62 Cal/gm mole |
TYPICAL ANALYSES - Impurities in ppm
|
Material / Purity: |
6N |
|
Ca |
<1 |
|
Cu |
<1 |
|
Fe |
<1 |
|
Pb |
<1 |
|
Mg |
<1 |
|
Si |
<1 |
|
Sb |
1 |
ARSENIC LUMP
|
Material |
Purity |
|
Arsenic Lump, 100 Gram Ampoule |
6N |
Lump is sold pre-packaged in glass ampoules under dry argon. Call or This email address is being protected from spambots. You need JavaScript enabled to view it. for additional specifications or custom requirements.
ARSENIC COMPOUNDS
|
Material |
Purity |
|
Arsenic Oxide, As2O3, Powder |
4N, 5N |
|
Arsenic Selenide, As2Se3, 1/4" Pieces by Down |
2N, 5N |
Compounds are packaged to order and sold by the gram or kilogram. Call or This email address is being protected from spambots. You need JavaScript enabled to view it. for additional specifications or custom requirements.
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