Arsenic information, including Technical Data, Safety Data and its properties, research, applications and other useful facts are discussed below. Scientific facts such as the atomic structure, ionization energy, abundance on Earth, conductivity and thermal properties are included.
Arsenic has numerous applications as a semiconductor and other electronic applications as Indium arsenide, silicon arsenide and tin arsenide. Arsenic is finding increasing uses as a doping agent in solid-state devices such as transistors. Gallium arsenide is used as a laser material to convert electricity directly into coherent light. Arsenic is used in bronzing and for hardening and improving the sphericity of shot. Arsenic is available as metal and compounds with purities from 99% to 99.9999% (ACS grade to ultra-high purity); metals in the form of foil, sputtering target, and rod, and compounds as submicron and nanopowder. Arsenic facts, including appearance, CAS #, and molecular formula and safety data, research and properties are
Oxides are available in forms including powders and dense pellets for such uses as optical coating and thin film applications. Oxides tend to be insoluble. Fluorides are another insoluble form for uses in which oxygen is undesirable such as metallurgy, chemical and physical vapor deposition and in some optical coatings. Arsenic is available in soluble forms including chlorides, nitrates and acetates. These compounds are also manufactured as solutions at specified stoichiometries. Arsenic is a Block P, Group 15, Period 4 element. The electronic configuration is [Ar] 3d10 4s2 4p3. In its elemental form arsenic's CAS number is 1327-53-3. The arsenic atom has a radius of 124.5.pm and it's Van der Waals radius is 185.pm.All elemental metals, compounds and solutions may be synthesized in ultra high purity (e.g. 99.999%) for laboratory standards, advanced electronic, metallurgy and optical materials and other high technology advantages. Information is provided for stable (non-radioactive) isotopes. Organo-Metallic Arsenic compounds are soluble in organic or non-aqueous solvents. See Analytical Services for information on available certified chemical and physical analysis techniques including MS-ICP, X-Ray Diffraction, PSD and Surface Area (BET) analysis. Arsenic was first discovered by Early Man.<
Abundance. The following table shows the abundance of arsenic and each of its naturally occurring isotopes on Earth along with the atomic mass for each isotope. |
Arsenic 
Arsen 
Arsenico
Arsênic 
Arsénico 
Arsenik
Isotope |
Atomic Mass |
% Abundance on Earth |
As-75 |
74.921596 |
100 |
Safety Data. The safety data for arsenic metal, nanoparticles and its compounds can vary widely depending on the form. For potential hazard information, toxicity, and road, sea and air transportation limitations, such as DOT Hazard Class, DOT Number, EU Number, NFPA Health rating and RTECS Class, please see the specific material or compound referenced in the left margin.
Ionization Energy. The ionization energy for arsenic (the least required energy to release a single electron from the atom in it's ground state in the gas phase) is stated in the following table: |
1st Ionization Energy |
944.46 kJ mol-1 |
2nd Ionization Energy |
1797.82 kJ mol-1 |
3rd Ionization Energy |
2735.48 kJ mol-1 |
Conductivity. As to arsenic's electrical and thermal conductivity, the electrical conductivity measured as to electrical resistivity @ 20 ºC is 33.3 μΩcm and its electronegativities (or its ability to draw electrons relative to other elements) is 2.18. The thermal conductivity of arsenic is 50 W m-1 K-1.
Thermal Properties. The melting point and boiling point for arsenic are stated below. The following chart sets forth the heat of fusion, heat of vaporization and heat of atomization. |
Heat of Fusion |
27.7 kJ mol-1 |
Heat of Vaporization |
31.9 kJ mol-1 |
Heat of Atomization |
301.42 kJ mol-1 |
| Formula | Atomic Number | Molecular Weight | Electronegativity (Pauling) | Density | Melting Point | Boiling Point |
Vanderwaals radius |
Ionic radius | Energy of first ionization |
| As | 33 | 74.9216 g.mol -1 | 2.0 | 5.7 g.cm-3 at 20 °C | 814 °C | 615 °C | 185.pm | 0.222 nm (-2) ; 0.047 (+5) ; 0.058 (+3) | 944.46 7 kJ.mol-1 |
| PRODUCT CATALOG | UK Operations | Submicron & Nanopowder | Tolling | Ultra High Purity | Sputtering Target | Crystal Growth | Rod, Plate, Powder, etc. | Foil |
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