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Physical And Chemical Properties Of Arsenic Pdf

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Arsenic, Physical and Chemical Properties

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Arsenic - As

In this study, arsenic sulphide A s4 S 4 nanoparticles have been prepared, by high-energy wet milling, in the presence of sodium dodecylsulphate, which acts a surfactant. Solid state properties of the nanoparticles were characterised by XRD, Raman scattering, specific surface area and particle size distribution. Changes in surface areas of the particles, in the 0. Anticancer effects, of the milled species, were confirmed for the human multiple myeloma U and OPM1 cell lines. Dissolution experiments in simulated gastric fluid show a possibility for the application of the realgar nanoparticles as an oral dose in future arsenic drug cancer treatments. Request Permissions. Bonazzi and L.

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Download entry PDF. How to cite. Arsenic is a bright silver-gray metalloid; its outermost electrons are not free to move in the crystal structure because they are‚Äč.


Physical, Chemical, and Biological Methods for the Removal of Arsenic Compounds

Arsenic As , a chemical element in the nitrogen group Group 15 [Va] of the periodic table , existing in both gray and yellow crystalline forms. Arsenic was known in the form of certain of its compounds long before it was clearly recognized as a chemical element. In the 4th century bce Aristotle wrote of a substance called sandarache, now believed to have been the mineral realgar , a sulfide of arsenic. Then, in the 1st century ce , the writers Pliny the Elder and Pedanius Dioscorides both described auripigmentum , a substance now thought to have been the dyestuff orpiment , As 2 S 3.

Arsenic, Physical and Chemical Properties

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Arsenic - As

Arsenic appears in three allotropic forms: yellow, black and grey; the stable form is a silver-gray, brittle crystalline solid. It tarnishes rapidly in air, and at high temperatures burns forming a white cloud of arsenic trioxide. Arsenic is a member of group Va of the periodic table , which combines readily with many elements. The metallic form is brittle, tharnishes and when heated it rapidly oxidizes to arsenic trioxide, which has a garlic odor. The non metallic form is less reactive but will dissolve when heated with strong oxidizing acids and alkalis. Arsenic compounds are used in making special types of glass, as a wood preservative and, lately, in the semiconductor gallium arsenade, which has the ability to convert electric current to laser light.

Arsenic occurs in many minerals, usually in combination with sulfur and metals , but also as a pure elemental crystal. Arsenic is a metalloid. It has various allotropes , but only the gray form, which has a metallic appearance, is important to industry. The primary use of arsenic is in alloys of lead for example, in car batteries and ammunition. Arsenic is a common n-type dopant in semiconductor electronic devices. It is also a component of the III-V compound semiconductor gallium arsenide. Arsenic and its compounds, especially the trioxide, are used in the production of pesticides , treated wood products, herbicides , and insecticides.

NCBI Bookshelf. Arsenic, Metals, Fibres and Dusts. Since that time, new data have become available, these have been incorported in the Monograph , and taken into consideration in the present evaluation. Information on the physical and chemical properties of arsenic and arsenic compounds can be found in Table 1. The list is not exhaustive, nor does it comprise necessarily the most commercially important arsenic-containing substances; rather, it indicates the range of arsenic compounds available. Chemical names, CAS numbers, synonyms, and molecular formulae of arsenic and arsenic compounds. Arsenic atomic number, 33; relative atomic mass,


Arsenic appears in three allotropic forms: yellow, black and grey; the stable form is a silver-gray, brittle crystalline solid. It tarnishes rapidly in air, and at high temperatures burns forming a white cloud of arsenic trioxide.


Arsenic As , a chemical element in the nitrogen group Group 15 [Va] of the periodic table , existing in both gray and yellow crystalline forms. Arsenic was known in the form of certain of its compounds long before it was clearly recognized as a chemical element. In the 4th century bce Aristotle wrote of a substance called sandarache, now believed to have been the mineral realgar , a sulfide of arsenic. Then, in the 1st century ce , the writers Pliny the Elder and Pedanius Dioscorides both described auripigmentum , a substance now thought to have been the dyestuff orpiment , As 2 S 3.

The patented methods of making manganese arsenates for insecticidal use consist in treating a manganese compound, such as pyrolusite, with white arsenic As 2 O 3 in the presence of nitric acid as a catalyst. The manganous arsenate formed is partly converted to the trimanganoarsenate by treatment with manganese carbonate to lower the water soluble arsenic content. The brown color of the insecticide is produced by treating the mixed arsenates with lime, which decomposes some of the arsenates with the formation of calcium arsenate and hydrated oxides of manganese. Burnt umber is also generally added to cheapen the product.

Arsenic Metal

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