ChemicalBook > Product Catalog >Inorganic chemistry >Oxides and peroxides >non-metals oxides and peroxides >ARSENIC PENTOXIDE


ARSENIC PENTOXIDE Basic information
Product Categories:Industrial/Fine Chemicals;Inorganics;Arsenic;Catalysis and Inorganic Chemistry;Chemical Synthesis;metal oxide
Mol File:1303-28-2.mol
ARSENIC PENTOXIDE Chemical Properties
Melting point 315 °C
density 4,32 g/cm3
storage temp. Poison room
form Powder
Specific Gravity4.32
color White
Water Solubility Soluble in water and alcohol.
Sensitive Hygroscopic
Merck 14,798
CAS DataBase Reference1303-28-2(CAS DataBase Reference)
EPA Substance Registry SystemArsenic(V) pentoxide (1303-28-2)
Safety Information
Hazard Codes T,N,T+
Risk Statements 23/25-45-50/53-28-23
Safety Statements 45-53-61-60-36/37-28
RTECS CG2275000
HazardClass 6.1
PackingGroup II
HS Code 28112990
Hazardous Substances Data1303-28-2(Hazardous Substances Data)
MSDS Information
ALFA English
Chemical Propertieswhite to off-white powder and chunks
Chemical PropertiesArsenic pentoxide is an odorless white lumpy solid or powder and nonflammable. It may be shipped as a concentrated water solution.
Chemical PropertiesArsenic pentoxide is an important commercial compound of arsenic. It is a white, shapeless (amorphous), crystalline, lumpy solid or, hygroscopic powder, and is not combustible. It emits irritating or toxic fumes (or gases) in a fi re. Arsenic pentoxide is used as a solid or as a solution in the manufacture of arsenates, weed killer, metal adhesives, insecticides, fungicide wood preservatives, and colored gases, and in printing and dyeing. It can be synthesized either by burning elemental arsenic in oxygen, or by oxidizing arsenic trioxide with oxidizing agents, such as ozone, hydrogen peroxide, and nitric acid. Arsenic pentoxide decomposes to oxygen and As2O3 on heating, and dissolves readily in water to form arsenic acid, H3AsO4. Arsenic pentoxide reacts violently with bromine pentafl uoride and reducing agents, and attacks many metals in the presence of water or moisture.
Physical propertiesWhite amorphous solid; deliquescent; density 4.32 g/cm3; melts at 315°C; dissolves slowly in water but is very soluble (230 g/100g at 20°C); also soluble in alcohol.
OccurrenceArsenic pentoxide is used to make colored glass; in fungicide formulations; in adhesive for metals; in wood preservatives; in dyeing and printing; and to prepare arsenates.
UsesArsenic(V) oxide is used in the preparation of metal arsenates. It is used for dye and printing industries. Further, it is used in wood preservatives, colored glass and metal adhesives.
Usesmanufacture of colored glass; in adhesives for metals; in wood preservatives; in weed control; as fungicide.
UsesArsenic pentoxide (As2O5) is manufactured by adding oxygen to the trioxide form and is used to form many arsenic compounds.
PreparationArsenic pentoxide is prepared by dehydration of crystalline arsenic acid at 200°C or above. The former is made by treating arsenic metal or arsenious oxide with nitric acid. Also, the pentoxide can be prepared by the reaction of arsenic trioxide with oxygen under pressure.
General DescriptionA white crystalline solid. Noncombustible. Corrosive to metals in the presence of moisture. Toxic by ingestion.
Air & Water ReactionsDissolves in water to give solutions of arsenic acid.
Reactivity ProfileARSENIC PENTOXIDE is an oxidizing acid. Oxidizing acids are generally soluble in water with the release of hydrogen ions. The resulting solutions have pH's of less than 7.0. Materials in this group react with chemical bases (for example: amines and inorganic hydroxides) to form salts. These neutralization reactions occur as the base accepts hydrogen ions that the acid donates. Neutralizations can generate dangerously large amounts of heat in small spaces. The dissolution of acids in water or the dilution of their concentrated solutions with water may generate significant heat. The addition of water acids often generates sufficient heat in the small region of mixing to boil some of the water explosively. The resulting "bumping" spatters acid widely. These materials have significant ability as oxidizing agents. but that ability varies (for example, from high for nitric acid to low for sulfuric acid and most sulfonic acids). They can react with active metals, including iron and aluminum, and also many less active metals, to dissolve the metal and liberate hydrogen and/or toxic gases. Like other acids, materials in this group can initiate polymerization in certain classes of organic compounds. Their reactions with cyanide salts and compounds release gaseous hydrogen cyanide. Flammable and/or toxic gases are also often generated by their reactions with dithiocarbamates, isocyanates, mercaptans, nitrides, nitriles, sulfides, and weak or strong reducing agents. Additional gas-generating reactions occur with sulfites, nitrites, thiosulfates (to give H2S and SO3), dithionites (SO2), and even carbonates: the carbon dioxide gas from the last is nontoxic but the heat and spattering from the reaction can be troublesome. Acids often catalyze (increase the rate of) chemical reactions.
HazardConfirmed carcinogen.
Health HazardExposures to arsenic pentoxide dust causes eye irritation, itching, burning, mild temporary redness and/or infl ammation of the eye membrane (conjunctivitis), lacrimation, diplopia (temporary double vision), photophobia (abnormal sensitivity to light), vision dimness, and other transient eye damage or lesion formation (ulceration), cough, redness, sore throat, headache, dizziness, weakness, shortness of breath, and pain in chest. There may be a delay in the appearance of the symptoms of poisoning. Ingestion of arsenic pentoxide causes vomiting, abdominal pain, diarrhea, severe thirst, muscular cramps, and shock. Arsenic pentoxide causes adverse health effects to the eyes, infl ammation and redness of the skin (erythroderma) with skin shedding (exfoliative dermatitis) may result from hyperkeratosis, pulmonary edema, acute respiratory distress syndrome (ARDS), and respiratory failure. Cardiovascular disturbances (heart rate, sinus tachycardia, and ventricular dysrhythmias), acute degenerative disease or dysfunction of the brain (encephalopathy) may develop and progress over several days, leading to delirium, and confusion. Severe exposures to arsenic pentoxide cause seizures, brain swelling (cerebral edema) and brain vessel bleeding (micro-hemorrhages) and damage in, peripheral nervous system, bone marrow (hematopoietic changes), liver, and lungs. Exposure far above the occupational exposure limits (OEL) may result in death.
Health HazardARSENIC PENTOXIDE is extremely toxic; the probable oral lethal dose for humans is 5-50 mg/kg, or between 7 drops and 1 teaspoonful for a 150-lb. person. It is irritating to eyes, nose, and throat. Chronic exposure may cause nerve damage to the extremities, alter cellular composition of the blood, and cause structural changes in blood components. There is sufficient evidence that inorganic arsenic compounds are skin and lung carcinogens in humans.
Fire HazardFire may produce irritating or poisonous gases. Reacts with metal and may give off toxic arsine gas. Hazardous polymerization may not occur.
Safety ProfileConfirmed human carcinogen. Poison by ingestion and intravenous routes. Experimental reproductive effects. Mutation data reported. Reacts vigorously with Rb2C2. When heated to decomposition it emits toxic fumes of arsenic. See also ARSENIC COMPOUNDS.
Potential ExposureArsenic pentoxide is used in production of metal arsenates; as an herbicide, defoliant on cotton; as a chemical intermediate; as an ingredient in wood preservatives; and in glass. Other possible uses are as an insecticide and soil sterilant.
storageArsenic pentoxide should be kept stored separately from strong bases, reducing substances, food, and feedstuffs and dry and safe area.
ShippingUN1559 Arsenic pentoxide, Hazard Class: 6.1; Labels: 6.1-Poisonous materials.
IncompatibilitiesDecomposes above 315 C, forming oxygen and arsenic trioxide fumes. Arsenic pentoxide is an oxidizer; reacts violently with bromine pentafluoride and reducing agents. The solution in water is a weak acid. Incompatible with acids, strong alkalis; halogens, rubidium carbide, zinc. Corrosive to metals in the presence of moisture. Contact with acids or acid mists releases deadly arsine gas.
Waste DisposalDissolve in a minimum of concentrated hydrochloric acid. Dilute with water until white precipitate forms. Add HCl to dissolve. Saturate with H2S; filter and wash precipitate and return to supplier. Alternatively, precipitate with heavy metals, such as lime or ferric hydroxide in lieu of H2S. If needed, seek professional environmental engineering assistance from the United States Environmental Protection Agency Environmental Response Team at (908) 548-8730 (24-hour response line). Consult with environmental regulatory agencies for guidance on acceptable disposal practices. Generators of waste containing this contaminant (≥100 kg/ mo) must conform with EPA regulations governing storage, transportation, treatment, and waste disposal. In accordance with 40CFR165, follow recommendations for the disposal of pesticides and pesticide containers. Must be disposed properly by following package label directions or by contacting your local or federal environmental control agency, or by contacting your regional EPA office.
PrecautionsDuring handling and use of arsenic pentoxide, occupational workers should use protective gloves, protective clothing, safety goggles or eye protection in combination with breathing protection if using powder, and workers should not eat, drink, or smoke in the area. The worker should NOT wash away the spillage/waste into the sewer. The containers of arsenic pentoxide may explode when heated
ARSENIC PENTOXIDE Preparation Products And Raw materials
Raw materialsArsenic(III) oxide
Preparation Products5-CHLOROQUINOLIN-6-AMINE-->7-CHLOROQUINOLIN-6-AMINE-->8-Nitroquinoline
Tag:ARSENIC PENTOXIDE(1303-28-2) Related Product Information
ARSENAZO III DISODIUM SALT PHENYLARSONIC ACID Phenylarsine oxide Gallium arsenide 4-Aminophenylarsonic acid [2-(diphenylarsino)ethyl]diphenylphosphine 1,2-BIS(DIPHENYLARSINO)ETHANE Arsenic(III) oxide SODIUM ARSENATE ARSENAZO I ARSENIC PENTOXIDE,ARSENIC PENTOXIDE HYDRATE ARSENIC PENTOXIDE THORIN Roxarsone Sodium cacodylate 97+ 2-Aminobenzenearsonic acid TRIPHENYLARSINE CACODYLIC ACID