Arsenic

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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 of copper and lead smelters, from which it is obtained as white arsenic (arsenic trioxide) in varying degrees of purity. This is reduced with charcoal. The commercial grade is not made in the U.S. Hazard: Highly toxic by ingestion and inhalation. A known carcinogen. OSHA standard for employee exposure is 10 ug/m of air. Respirators required for worker exposure to more than 500 ug/m ACGIH tolerance is 0.2 mg/m3 (As soluble compounds).

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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:

5N

6N

Al

<1.0

0.1

Ca

<1.0

0.1

Cu

<1.0

<0.1

Fe

<1.0

-

Pb

<1.0

-

Mg

<1.0

-

Si

<1.0

0.1

S

<1.0

<0.1

ARSENIC POWDER, SHOT, PELLETS, & INGOT

 Material

Purity

Arsenic Pieces  3-12mm, 10 Gram Ampoule

4N, 5N, 6N

Arsenic Pieces  3-12mm, 25 Gram Ampoule

4N, 5N, 6N

Arsenic Pieces  3-12mm, 100 Gram Ampoule

4N, 5N, 6N

Arsenic Powder-40 Mesh

6N

Powder and pieces are sold by the gram or kilogram, pre-packaged in glass ampoules are packaged and 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 msds1

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.

 

 

Material Safety Data Sheet - MSDS
Arsenic MSDS
Technical Data Sheets
Arsenic
Understanding Mesh Sizes