Arsenic Elemental Symbol

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Arsenic Arsen Arsenico Arsênic Arsénico Arsenik

Arsenic(As) atomic and molecular weight, atomic number and elemental symbolArsenic is a Block P, Group 15, Period 4 element. Arsenic Bohr ModelThe number of electrons in each of Arsenic's shells is 2, 8, 18, 5 and its electron configuration is [Ar] 3d10 4s2 4p3. Elemental ArsenicThe arsenic atom has a radius of and its Van der Waals radius is In its elemental form, CAS 1327-53-3, arsenic has a metallic grey appearance. Arsenic is found in numerous minerals including arsenolite (As2O3), arsenopyrite (FeAsS), loellingite (FeAs2), orpiment (As2S3), and realgar (As4S4). Arsenic was discovered in the early Bronze Age, circa 2500 BC. It was first isolated by Albertus Magnus in 1250.

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. Due to their toxicity, arsenic compounds are used in insecticides and wood preservation. High Purity (99.9999%) Arsenic Oxide (As2O3) PowderHigh Purity (99.99999%) Arsenic (As)Sputtering TargetArsenic is available as metal and compounds with purities from 99% to 99.999% (ACS grade to ultra-high purity). Elemental or metallic forms include pellets, rod, wire and granules for evaporation source material purposes. Arsenic nanoparticles and nanopowders provide ultra-high surface area which nanotechnology research and recent experiments demonstrate function to create new and unique properties and benefits. Oxides are available in powder and dense pellet form 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 also available in soluble forms including chlorides, nitrates and acetates. These compounds can be manufactured as solutions at specified stoichiometries.

Though inorganic arsenic is extremely toxic, even in very small amounts, other forms of arsenic have proven safe and even potentially beneficial to humans. Safety data for Arsenic 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 Products tab below.

  • Properties
  • Safety Data
  • Products
  • Research
  • Isotopes
  • Other Elements

Arsenic Properties

Symbol: As Melting Point: 616 oC, 1140.8 oF, 889.15 K
Atomic Number: 33 Boiling Point: Sublimes
Atomic Weight: 74.92 Density: 5.778 kg/m³
Element Category: metalloid Liquid Density @ Melting Point: 5.22 g·cm−3
Group, Period, Block: 15 (pnictogens), 4, p Specific Heat: 0.328 kJ/kg °K
    Heat of Vaporization 31.9 kJ mol-1
CHEMICAL STRUCTURE Heat of Fusion 27.7 kJ mol-1
Electrons: 33 Thermal Conductivity: W/cm/ K @ 298.2 K
Protons: 33 Thermal Expansion: N/A
Neutrons: 42 Electrical Resistivity: α-metallic form, 260 nΩ · m at 0 oC
Electron Configuration: [Ar] 3d104s24p3 Electronegativity: 2.18 (pauling scale)
Atomic Radius: 119 pm Tensile Strength: N/A
Covalent Radius: 119±4 pm Molar Heat Capacity: 24.64 J·mol−1·K−1
Van der Waals radius: 185 pm Young's Modulus: 8 GPa
Oxidation States: 5, 3, -3 Shear Modulus: N/A
Phase: Solid Bulk Modulus: 22 GPa
Crystal Structure: simple trigonal Poisson Ratio: N/A
Magnetic Ordering: diamagnetic Mohs Hardness: 3.5
1st Ionization Energy: 944.46 kJ mol-1 Vickers Hardness: N/A
2nd Ionization Energy: 1797.82 kJ mol-1 Brinell Hardness: 1440 MPa
3rd Ionization Energy: 2735.48 kJ mol-1 Speed of Sound: N/A
CAS Number: 7440-38-2 Abundance in typical human body, by weight: 50 ppb
ChemSpider ID: 4514330 Abundance in typical human body, by atom: 4 ppb
PubChem CID: 7440-38-2 Abundance in universe, by weight: 8 ppb
MDL Number: MFCD00085309 Abundance in universe, by atom: 0.1 ppb
EC Number: 231-148-6 Discovered By: Ancients
Beilstein Number: N/A Discovery Date: Bronze Age circa 2500 BC
SMILES Identifier: [AsH3]  
InChI Identifier: InChI=1S/As Other Names: Arsen, Arsenico, Arsenik

Health, Safety & Transportation Information for Arsenic

Material Safety Data Sheet MSDS
Signal Word Danger
Hazard Statements H301-H331-H410
Hazard Codes T, N
Risk Codes 23/25-50/53
Safety Precautions 20/21-28-45-60-61
RTECS Number CG0525000
Transport Information UN 1558 6.1/PG 2
WGK Germany 3
Globally Harmonized System of
Classification and Labelling (GHS)
Skull and Crossbones-Acute Toxicity  Environment-Hazardous to the aquatic environment  

Arsenic Products

Metal Forms  •  Compounds  •  Alloys  •  Oxide Forms  •  Organometallic Compounds
Sputtering Targets  •  Nanomaterials  •  Semiconductor Materials


Arsenic Acetate
Arsenic Bromide
Arsenic Carbide
Arsenic Chloride
Arsenic Chloride Solution
Arsenic Hydride AsH3
Arsenic Diiodide As2I4
Arsenic(III) Iodide AsI3
Arsenic(III) Oxide As2O3
Arsenic(V) Oxide As2O5
Arsenic(V) Oxide Hydrate
Barium Arsenate
Bismuth Arsenate
Calcium Arsenate
Copper Arsenate
Diarsine (Arsenic Hydride) As2H4
Iron Arsenate
Lead Arsenate
Lithium Arsenate
Lithium Hexafluoroarsenate(V)
Nickel Arsenate
Potassium Arsenate
Potassium Arsenate Monobasic
Potassium Hexafluoroarsenate(V)
Potassium Titanyl Arsenate
Rubidium Dihydrogenarsenate
Silver Arsenate
Silver Hexafluoroarsenate(V)
Sodium Arsenate
Sodium (meta)arsenite
Sodium Hexafluoroarsenate(V)
Sodium Hydrogen Arsenate Heptahydrate
Strontium Arsenate
Zinc Arsenate

Sputtering Targets

Arsenic Oxide Rotatable Sputtering Target
Arsenic Oxide Sputtering Target
Arsenic Phosphide Sputtering Target
Arsenic Rotatable Sputtering Target
Arsenic Selenide Sputtering Target
Arsenic Sputtering Target
Arsenic Sulfide Sputtering Target
Arsenic Telluride Sputtering Target
Cadmium Arsenide Sputtering Target
Gallium Arsenide Sputtering Target
Gold Arsenic Sputtering Target
Indium Arsenide Sputtering Target
Silicon Arsenide Sputtering Target
Tin Arsenide Sputtering Target
Zinc Arsenide Sputtering Target

Organometallic Compounds

Arsenic Ethoxide
Dimethylarsinic Acid
Cacodylic Acid Sodium Salt
Cacodylic Acid Sodium Salt Trihydrate
Tetraphenylarsonium (V) Chloride Hydrate
Tetraphenylarsonium (V) Chloride Hydrochloride Hydrate
Crystal/ Semiconductor Materials

Triphenylarsine Oxide
Aluminum Arsenide
Antimony Arsenide
Arsenic Phosphide
Arsenic Selenide
Arsenic Sulfide
Arsenic Telluride
Arsenic Telluride Lump
Cadmium Arsenide
Cadmium(IV) Arsenide
Calcium Arsenide
Chromium Arsenide
Cobalt Arsenide CoAs2
Cobalt Arsenide CoAs3
Erbium Arsenide
Europium Arsenide
Gallium Aluminum Arsenide Granules
Gallium Aluminum Arsenide Powder
Gallium Aluminum Arsenide Lump
Gadolinium Arsenide
Gallium Arsenide
Gallium Arsenide Wafer
Gallium Arsenide Windows
Gallium Indium Arsenide
Gallium Arsenide Single Crystal Substrate
Germanium Arsenide
Indium Aluminum Arsenide Granule
Indium Aluminum Arsenide Lump
Indium Aluminum Arsenide Powder
Indium Arsenide
Indium Arsenide Wafer
Indium Phosphide Arsenide
Indium Gallium Arsenide Granules
Indium Gallium Arsenide Lump
Indium Gallium Arsenide Powder
Indium Gallium Phosphorus Arsenide Granules
Indium Gallium Phosphorus Arsenide Powder
Indium Gallium Phosphorus Arsenide Lump
Lanthanum Arsenide
Lead Tin Arsenide Granules
Lead Tin Arsenide Lump
Lead Tin Arsenide Powder
Lutetium Arsenide
Magnesium Arsenide
Manganese Arsenide
Neodymium Arsenide
Nickel Arsenide
Samarium Arsenide
Silicon Arsenide
Terbium Arsenide
Tin Arsenide
Ytterbium Arsenide
Yttrium Arsenide
Zinc Arsenide
Zinc(IV) Arsenide
Zirconium Arsenide

Oxide Forms

Arsenic Oxide Nanopowder
Arsenic Oxide Pellets
Arsenic Oxide Pieces
Arsenic Oxide Powder
Arsenic Oxide Rotatable Sputtering Target
Arsenic Oxide Shot
Arsenic Oxide Sputtering Target
Arsenic Oxide Tablets

Recent Research & Development for Arsenic

  • O. Shpotyuk, S. Kozyukhin, Ya. Shpotyuk, P. Demchenko, V. Mitsa, M. Veres, Coordination disordering in near-stoichiometric arsenic sulfide glass, Journal of Non-Crystalline Solids, Volume 402, 15 October 2014
  • Marko Peric, Ljubica Andjelkovic, Matija Zlatar, Claude Daul, Maja Gruden-Pavlovic, DFT investigation of the influence of Jahn–Teller distortion on the aromaticity in square-planar arsenic and antimony clusters, Polyhedron, Volume 80, 25 September 2014
  • Jeonghyun Park, Yosep Han, Eunseong Lee, Uikyu Choi, Kyungkeun Yoo, Youngsoo Song, Hyunjung Kim, Bioleaching of highly concentrated arsenic mine tailings by Acidithiobacillus ferrooxidans, Separation and Purification Technology, Volume 133, 8 September 2014
  • Shuqiong Kong, Yanxin Wang, Qinhong Hu, Abass K. Olusegun, Magnetic nanoscale Fe–Mn binary oxides loaded zeolite for arsenic removal from synthetic groundwater, Colloids and Surfaces A: Physicochemical and Engineering Aspects, Volume 457, 5 September 2014
  • Qiong Du, Lixia Zhou, Shujuan Zhang, Bingcai Pan, Lu Lv, Weiming Zhang, Quanxing Zhang, Iron-mediated oxidation of arsenic(III) by oxygen and hydrogen peroxide: Dispersed versus resin-supported zero-valent iron, Journal of Colloid and Interface Science, Volume 428, 15 August 2014
  • Bo Chen, Zhiliang Zhu, Jie Ma, Mingxuan Yang, Jun Hong, Xiaohui Hu, Yanling Qiu, Junhong Chen, One-pot, Solid-phase Synthesis of Magnetic Multiwalled Carbon Nanotube/Iron Oxide Composites and Their Application in Arsenic Removal, Journal of Colloid and Interface Science, Available online 10 August 2014
  • Aisha A. Saad-El-Din, Zinab H. El-Tanahy, Suzan N. El-sayed, Laila M. Anees, Hoda A. Farroh, Combined effect of arsenic trioxide and radiation on physical properties of hemoglobin biopolymer, Journal of Radiation Research and Applied Sciences, Available online 7 August 2014
  • Kosuke O. Hara, Noritaka Usami, Masakazu Baba, Kaoru Toko, Takashi Suemasu, N-type doping of BaSi2 epitaxial films by arsenic ion implantation through a dose-dependent carrier generation mechanism, Thin Solid Films, Available online 7 August 2014
  • Qi Zhang, Mohammad Reza Vakili, Xing-Fang Li, Afsaneh Lavasanifar, X. Chris Le, Polymeric micelles for GSH-triggered delivery of arsenic species to cancer cells, Biomaterials, Volume 35, Issue 25, August 2014
  • Alexandra Faucher, Victor V. Terskikh, Roderick E. Wasylishen, Feasibility of arsenic and antimony NMR spectroscopy in solids: An investigation of some group 15 compounds, Solid State Nuclear Magnetic Resonance, Volumes 61–62, July–September 2014
  • Courtney M. Donahue, Isabella K. Black, Samantha L. Pecnik, Thomas R. Savage, Brian L. Scott, Scott R. Daly, Synthesis, characterization and structural comparisons of phosphonium and arsenic dithiocarbamates with alkyl and phenyl substituents, Polyhedron, Volume 75, 17 June 2014
  • Guo-lin YU, Ying ZHANG, Shi-li ZHENG, Xing ZOU, Xiao-hui WANG, Yi ZHANG, Extraction of arsenic from arsenic-containing cobalt and nickel slag and preparation of arsenic-bearing compounds, Transactions of Nonferrous Metals Society of China, Volume 24, Issue 6, June 2014
  • S. Tresintsi, K. Simeonidis, N. Pliatsikas, G. Vourlias, P. Patsalas, M. Mitrakas, The role of surface distribution in arsenic removal by iron oxy-hydroxides, Journal of Solid State Chemistry, Volume 213, May 2014
  • Yi-Feng Lin, Jia-Ling Chen, Magnetic mesoporous Fe/carbon aerogel structures with enhanced arsenic removal efficiency, Journal of Colloid and Interface Science, Volume 420, 15 April 2014
  • Priyanka Singh, Sunil Kumar Singh, Jaya Bajpai, Anil Kumar Bajpai, Ravi Bahadur Shrivastava, Iron crosslinked alginate as novel nanosorbents for removal of arsenic ions and bacteriological contamination from water, Journal of Materials Research and Technology, Available online 13 April 2014
  • J. CHAIDEZ-FELIX, A. ROMERO-SERRANO, A. HERNANDEZ-RAMIREZ, M. PEREZ-LABRA, I. ALMAGUER-GUZMAN, R. BENAVIDES-PEREZ, M. FLORES-FAVELA, Effect of copper, sulfur, arsenic and antimony on silver distribution in phases of lead blast furnace, Transactions of Nonferrous Metals Society of China, Volume 24, Issue 4, April 2014
  • Aviva Rutkin, Filter takes arsenic from drinking water and turns it into bricks, New Scientist, Volume 221, Issue 2962, 29 March 2014
  • Jun Fang, Baolin Deng, Rejection and modeling of arsenate by nanofiltration: Contributions of convection, diffusion and electromigration to arsenic transport, Journal of Membrane Science, Volume 453, 1 March 2014
  • A.F.M.Y. Haider, M. Hedayet Ullah, Z.H. Khan, Firoza Kabir, K.M. Abedin, Detection of trace amount of arsenic in groundwater by laser-induced breakdown spectroscopy and adsorption, Optics & Laser Technology, Volume 56, March 2014
  • Zhoulan Yin, Weihong Lu, Hui Xiao, Arsenic removal from copper–silver ore by roasting in vacuum, Vacuum, Volume 101, March 2014

Arsenic Isotopes

Arsenic has one stable isotope: 75As.

Nuclide Symbol Isotopic Mass Half-Life Nuclear Spin
75As 74.9215965 Stable 3/2-