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Oxygen

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Company Name: Henan DaKen Chemical CO.,LTD.
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Products Intro: Product Name:Oxygen
CAS:7782-44-7
Purity:99% Package:100g,500g,1kg,5kg,10kg
Company Name: Henan Tianfu Chemical Co.,Ltd.
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Products Intro: CAS:7782-44-7
Purity:99% Package:500G;1KG;5KG;25KG
Company Name: Mainchem Co., Ltd.
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Products Intro: Product Name:Oxygen
CAS:7782-44-7
Company Name: JinYan Chemicals(ShangHai) Co.,Ltd.  
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Products Intro: CAS:7782-44-7
Company Name: Chizhou Kailong Import and Export Trade Co., Ltd.  
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Products Intro: Product Name:Oxygen
CAS:7782-44-7
Purity:99.999%,99.9995% Package:cylinder pack
Oxygen Basic information
Product Name:Oxygen
Synonyms:Dioxygen;hyperoxia;liquidoxygen;Liquid-oxygen-;AUTOMOTIVE STANDARD R99-5;AUTOMOTIVE STANDARD R99-6;HYDROGEN AND OXYGEN;OXYGEN, PRESSURE TIN WITH 1 L
CAS:7782-44-7
MF:O2
MW:32
EINECS:231-956-9
Product Categories:refrigerants;Inorganics;Analytical Reagents;Replacement Kit Items;Water Test;OGas Standards;Alphabetic;Analytical Standards;Pure Gases;SCOTTY Gases;Chemical Synthesis;Compressed and Liquefied Gases;Synthetic Reagents;Compressed and Liquefied GasesMicro/Nanoelectronics;Electronic Chemicals;Gases
Mol File:7782-44-7.mol
Oxygen Structure
Oxygen Chemical Properties
Melting point −218 °C(lit.)
Boiling point −183 °C(lit.)
density 1.429(0℃)
vapor density 1.11 (vs air)
vapor pressure >760 mmHg at 20 °C
storage temp. -20°C
solubility At 20 °C and at a pressure of 101 kPa, 1 volume dissolves in about 32 volumes of water.
form colorless gas
OdorOdorless gas
Water Solubility one vol gas dissolves in 32 volumes H2O (20°C), in 7 volumes alcohol (20°C); soluble other organic liq, usually higher solubility than in H2O [MER06]
Merck 13,7033
Stability:Stable. Vigorously supports combustion. Incompatible with phosphorus, organic materials, many powdered metals.
CAS DataBase Reference7782-44-7(CAS DataBase Reference)
NIST Chemistry ReferenceOxygen(7782-44-7)
EPA Substance Registry SystemOxygen(7782-44-7)
Safety Information
Hazard Codes O,C
Risk Statements 8-52/53-34-48/20/22-37
Safety Statements 17-45-36/37/39-26-61
RIDADR UN 1072 2.2
WGK Germany -
RTECS RS2060000
4.5-31
HazardClass 2.2
Hazardous Substances Data7782-44-7(Hazardous Substances Data)
ToxicityOSHA recommends a minimum oxygen concentration of 19.5% for human occupancy.
MSDS Information
ProviderLanguage
Oxygen English
SigmaAldrich English
Oxygen Usage And Synthesis
Chemical PropertiesOxygen, O2, is a colorless, tasteless, gaseous element essential to almost all forms of life. It promotes respiration and combustion. Oxygen comprises 20% of the earth's atmosphere and is the most abundant element in seawater and in the earth's crust. It is slightly soluble in water and alcohol, but combines readily with most other elements to form oxides. The electrolysis of water produces both oxygen and hydrogen.
Chemical PropertiesOxygen is a colorless odorless gas or a bluish cryogenic liquid.
HistoryOxygen, as a gaseous element, forms 21% of the atmosphere by volume from which it can be obtained by liquefaction and fractional distillation. The atmosphere of Mars contains about 0.15% oxygen. The element and its compounds make up 49.2%, by weight, of the Earth’s crust. About two thirds of the human body and nine tenths of water is oxygen. In the laboratory it can be prepared by the electrolysis of water or by heating potassium chlorate with manganese dioxide as a catalyst. The gas is colorless, odorless, and tasteless. The liquid and solid forms are a pale blue color and are strongly paramagnetic. Ozone (O3), a highly active compound, is formed by the action of an electrical discharge or ultraviolet light on oxygen. Ozone’s presence in the atmosphere (amounting to the equivalent of a layer 3 mm thick at ordinary pressures and temperatures) is of vital importance in preventing harmful ultraviolet rays of the sun from reaching the Earth’s surface. There has been recent concern that pollutants in the atmosphere may have a detrimental effect on this ozone layer. Ozone is toxic and exposure should not exceed 0.2 mg/m3 (8-hour time-weighted average — 40-hour work week). Undiluted ozone has a bluish color. Liquid ozone is bluish black, and solid ozone is violet- black. Oxygen is very reactive and capable of combining with most elements. It is a component of hundreds of thousands of organic compounds. It is essential for respiration of all plants and animals and for practically all combustion. In hospitals it is frequently used to aid respiration of patients. Its atomic weight was used as a standard of comparison for each of the other elements until 1961 when the International Union of Pure and Applied Chemistry adopted carbon 12 as the new basis. Oxygen has thirteen recognized isotopes. Natural oxygen is a mixture of three isotopes. Oxygen 18 occurs naturally, is stable, and is available commercially. Water (H2O with 1.5% 18O) is also available. Commercial oxygen consumption in the U.S. is estimated to be 20 million short tons per year and the demand is expected to increase substantially in the next few years. Oxygen enrichment of steel blast furnaces accounts for the greatest use of the gas. Large quantities are also used in making synthesis gas for ammonia and methanol, ethylene oxide, and for oxy-acetylene welding. Air separation plants produce about 99% of the gas, electrolysis plants about 1%. The gas costs 5¢/ft3 ($1.75/cu. meter) in small quantities.
UsesIn oxyhydrogen or oxyacetylene flame for welding metals and for lighting (calcium light, etc); submarine work by divers, propellant for rockets. In the production of synthesis gas which can be used in the Fischer-Tropsch process for liquid fuels.
DefinitionThe most abundant elementon earth, making up about 47% of the earth’s mass,and essential for respiration.
General DescriptionOxygen is a colorless, odorless and tasteless gas. Oxygen will support life. Oxygen is noncombustible, but will actively support the burning of combustible materials. Some materials that will not burn in air will burn in Oxygen. Materials that burn in air will burn more vigorously in Oxygen. As a non-liquid gas Oxygen is shipped at pressures of 2000 psig or above. Pure Oxygen is nonflammable. Under prolonged exposure to fire or intense heat the containers may rupture violently and rocket. Oxygen is used in the production of synthesis gas from coal, for resuscitation and as an inhalant.
Reactivity ProfilePropellant; ignites upon contact with alcohols, alkali metals, amines, ammonia, beryllium alkyls, boranes, dicyanogen, hydrazines, hydrocarbons, hydrogen, nitroalkanes, powdered metals, silanes, or thiols [Bretherick 1979. p.174]. Heat of water will vigorously vaporize liquid Oxygen, pressures may build to dangerous levels if this occurs in a closed container. Liquid Oxygen gives a detonable mixture when combined with powdered aluminum [NFPA 491M. 1991].
Health HazardInhalation of 100% Oxygen can cause nausea, dizziness, irritation of lungs, pulmonary edema, pneumonia, and collapse. Liquid may cause frostbite of eyes and skin.
Health HazardOxygen is nontoxic under the usual conditions of laboratory use. Breathing pure oxygen at one atmosphere may produce cough and chest pains within 8 to 24 h, and concentrations of 60% may produce these symptoms in several days. Liquid oxygen can cause severe "burns" and tissue damage on contact with the skin due to extreme cold.
Fire HazardOxygen itself is nonflammable, but at concentrations greater than 25% supports and vigorously accelerates the combustion of flammable materials. Some materials (including metals) that are noncombustible in air will burn in the presence of oxygen.
Fire HazardBehavior in Fire: Increases intensity of any fire. Mixtures of liquid Oxygen and any fuel are highly explosive.
Safety ProfileHuman systemic effects by inhalation: cough and other pulmonary changes. Human teratogenic effects by inhalation: developmental abnormalities of the fetal cardovascular system. Mutation data reported. Not toxic as gas. In liquid form it can cause severe "burns" and tissue damage on contact with the slun due to extreme cold. An oxidant. Though itself nonflammable,it is essential to combustion. Even a slight increase in the oxygen content of the air above the normal 21% greatly increases the oxidation or burning rate (and the hazard) of many materials. Exclusion of O2 from the neighborhood of a fire is one of the principal methods of extinguishment. Avoid smoking, flames, electric sparks. Liquid O2 can explode on contact with readdy oxidizable materials, especially at high temperatures. Under the proper condltions of temperature, pressure, and reagent concentration it can react violently with acetaldehyde, acetylene, acetone, secondary alcohols (e.g., 2-propanol, 2-butanol) aluminum, Al(BH4)3, AH3, aluminumtitanium alloys, alkali metals @hum, cesium, potassium, rubidlum, sodlum, potassium), ammonia, ammonia + platinum, asphalt, ccl4, chlorinated hydrocarbons, cyanogen, barium, benzene, 1,4-benzenediol + 1-propanol, benzoic acid, Be(BH4)2, biological materials + ether, BAszBr3, B2H10, diH6, boron tribromide, boron trichloride, bromine + chlorotrifluoroethylene, butane + Ni(CO)4, carbon disulfide, carbon disulfide + mercury + anthracene, carbon monoxide, CsH, calcium, calcium hosphide, copper + hydrogen sulfide, Cl0H14, cyclohexane-l,2-done biskhenylhydrazone), cycl0℃tatetraene, dborane, diboron tetrafluoride, dimethoxymethane, dimethylketene, dimethyl sulfide, diphenyl ethylene, disilane, ethers (e.g., diethyl ether, diisopropyl ether, tetrahydro furan, dtoxane, ethyl ether), fibrous fabrics, fluorine + hydrogen, fuels, germanium, glycerol, halocarbons (e.g., l,l,l-trichloroethane, trichloroethylene, chlorotrifluoroethylene, bromotrifluoroethylene), hydrazine, hydrocarbons (e.g., 1,l-dphenylethylene, gasoline, cyclohexane, ethylene, cumene, pxylene, but-3-yne), hydrocarbons + promoters (e.g., methyl nitrate, nitromethane, ethyl nitrate, tetrafluorohydrazine), hydrogen, hydrogen sulfide, lithiated dalkylnitrosoamines, magnesium, metals, metal hydrides (e.g., sodtum hydride, uranium hydride, lithium h ydride, potassium hydride , rubidium hydride, cesium hydride, magnesium hydride), methane, methoxycycl0℃tatetraene, 4-methoxytoluene7 Ni(CO)4 + butane, nonmetal hydrides (e.g., diborane, tetraborane(lO), phosphine, pentaborane(1 l), pentaborane(9) , decaborane(l4), aluminum tetrahydroborate), oil films, organic matter, (OF2 + H20), phosphorus, phosphorus tribromide, phosphorus trifluoride, phosphorus(IⅡ) oxide, polymers [e.g., foam rubber, neoprene, polytetrafluoroethylene (teflon)], polytetrafluoroethylene + stainless steel, polyurethane, polyvinyl chloride, propylene oxide, K2O2, rhenium, trirhenium nonachloride, rubber + ozone, rubberized fabric, selenium, NaH, sodium hydroxide + tetramethyldsiloxane, strontium, tetracarbonylnickel, tetracarbonylnickel + mercury, tetrafluoroethylene, tetrafluorohydrazine, tetrasilane, titanium and alloys, trisilane, CH2Cl2, oil, paraformaldehyde, wood, charcoal. Compressed O2 is shipped in steel cylinders under hgh pressure. If these containers are broken due to shock or exposed to high temperature, an explosion and fire may result.
Potential ExposureCompressed oxygen is used in various oxidation processes, for feedstock; and enrichment purposes; as a medicinal gas; a chemical intermediate; in oxyacetylene welding; in metallurgy. Liquid oxygen is used as a rocket fuel. Oxygen is naturally present at a concentration of 21% in breathing air.
First aidEye Contact: With liquid oxygen -Immediately remove any contact lenses and flush with large amounts of water for at least 15 minutes, occasionally lifting upper and lower lids. Seek medical attention immediately. Skin Contact: With liquid oxygen-I. If frostbite has occurred, seek medical attention immediately; do not rub the affected areas or flush them with water. In order to prevent further tissue damage, do not attempt to remove frozen clothing from frostbitten areas. If frostbite has not occurred, immediately and thoroughly wash contaminated skin with soap and water. Seek medical attention. Breathing Pure Oxygen or Gases >40% O2; Remove the person from exposure. Begin (using universal precautions, including resuscitation mask) if breathing has stopped and CPR if heart action has stopped. Transfer promptly to a medical facility. Medical observation is recommended for 24-48 hours after breathing overexposure, as pulmonary edema may be delayed.
ShippingUN1072 Oxygen, compressed & UN1073 Oxygen, refrigerated liquid (cryogenic liquid), Hazard Class: 2.2; Labels: 2.2-Nonflammable compressed gas; 5.1- Oxidizer. Cylinders must be transported in a secure upright position, in a well-ventilated truck. Protect cylinder and labels from physical damage. The owner of the compressed gas cylinder is the only entity allowed by federal law (49CFR) to transport and refill them. It is a violation of transportation regulations to refill compressed gas cylinders without the express written permission of the owner.
Purification MethodsPurify it by passing the gas over finely divided platinum at 673oK and Cu(II) oxide (see under nitrogen) at 973o, then condensed in a liquid N2-cooled trap. HIGHLY EXPLOSIVE in contact with organic matter.
Flammability and ExplosibilityOxygen itself is nonflammable, but at concentrations greater than 25% supports and vigorously accelerates the combustion of flammable materials. Some materials (including metals) that are noncombustible in air will burn in the presence of oxygen.
IncompatibilitiesA strong oxidizer. Reacts violently with nearly every element, combustibles, organics, and reducing materials.
Waste DisposalReturn refillable compressed gas cylinders to supplier. Vent to atmosphere.
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