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Argon

Argon Suppliers list
Company Name: Mainchem Co., Ltd.
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Products Intro: Product Name:Argon
CAS:7440-37-1
Company Name: Shanghai Meishui Chemical Technology Co., Ltd  
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Products Intro: Product Name:Argon
CAS:7440-37-1
Purity:>98% HPLC Package:100g;500g;1kg;10kg
Company Name: Hangzhou J&H Chemical Co., Ltd.  
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Products Intro: Product Name:Argon
CAS:7440-37-1
Company Name: Sigma-Aldrich  
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Products Intro: Product Name:Argon 99.999%, Messer(R) CANGas
CAS:7440-37-1
Purity:99.999%, Messer(R) CANGas Package:1185.21RMB/1L Remarks:ALDRICH
Company Name: Shanghai wechem chemical co., ltd  
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Products Intro: Product Name:Argon
CAS:7440-37-1
Purity:99.9+ Package:10KG/500.00;
Argon Basic information
Product Name:Argon
Synonyms:argon,highpurity;argon,refrigeratedliquid;argon,refrigeratedliquid(cryogenicliquid);argon-40;argongas;argonliquid;argon atom;argon,compressed
CAS:7440-37-1
MF:Ar
MW:39.95
EINECS:231-147-0
Product Categories:Industrial/Fine Chemicals;refrigerants;Inorganics;Chemical Synthesis;Compressed and Liquefied Gases;Synthetic Reagents
Mol File:7440-37-1.mol
Argon Structure
Argon Chemical Properties
Melting point -189.2 °C(lit.)
Boiling point -185.7 °C(lit.)
density 1.784(0℃)
vapor density 1.38 (21 °C, vs air)
form colorless gas
Water Solubility 33.6mL/1000g H2O (20°C) [KIR78]; Henry’s law constants, k×10?4: 3.974 (25.0°C), 5.359 (65.1°C), 5.342 (91.1°C), 3.812 (222.7°C), 2.541 (267.3°C), 1.870 (287.9°C) [POT78]
Merck 13,788
Stability:Stable. Inert.
CAS DataBase Reference7440-37-1(CAS DataBase Reference)
NIST Chemistry ReferenceArgon(7440-37-1)
EPA Substance Registry SystemArgon(7440-37-1)
Safety Information
Safety Statements 38
RIDADR UN 1006 2.2
WGK Germany -
RTECS CF2300000
4.5-31
HazardClass 2.2
MSDS Information
ProviderLanguage
Argon English
SigmaAldrich English
Argon Usage And Synthesis
Chemical Propertiescolourless odourless gas
Chemical PropertiesWith the symbol A, argon is a nonflammable gas; one of the elements in the inert gas category. It is colorless.
HistoryThe presence of Argon in air was suspected by Cavendish in 1785, discovered by Lord Rayleigh and Sir William Ramsay in 1894. The gas is prepared by fractionation of liquid air, the atmosphere containing 0.94% argon. The atmosphere of Mars contains 1.6% of 40Ar and 5 p.p.m. of 36Ar. Argon is two and one half times as soluble in water as nitrogen, having about the same solubility as oxygen. It is recognized by the characteristic lines in the red end of the spectrum. It is used in electric light bulbs and in fluorescent tubes at a pressure of about 400 Pa, and in filling photo tubes, glow tubes, etc. Argon is also used as an inert gas shield for arc welding and cutting, as a blanket for the production of titanium and other reactive elements, and as a protective atmosphere for growing silicon and germanium crystals. Argon is colorless and odorless, both as a gas and liquid. It is available in high-purity form. Commercial argon is available at a cost of about 3¢ per cubic foot. Argon is considered to be a very inert gas and is not known to form true chemical compounds, as do krypton, xenon, and radon. However, it does form a hydrate having a dissociation pressure of 105 atm at 0°C. Ion molecules such as (ArKr)+, (ArXe)+, (NeAr)+ have been observed spectroscopically. Argon also forms a clathrate with β-hydroquinone. This clathrate is stable and can be stored for a considerable time, but a true chemical bond does not exist. Van der Waals’ forces act to hold the argon. In August 2000, researchers at the University of Helsinki, Finland reported they made a new argon compound HArF 4-4 The Elements by shining UV light on frozen argon that contained a small amount of HF. Naturally occurring argon is a mixture of three isotopes. Seventeen other radioactive isotopes are now known to exist. Commercial argon is priced at about $70/300 cu. ft. or 8.5 cu. meters.
UsesGas as shield in gas metal-arc welding, in metal processing; carrier in gas-liquid and gas-solid chromatography; gas filler for incandescent light bulbs. Gas in fluorescent tubes analogous to neon lights, but produces a blue-purplish light; in rectifier tubes; in thermometers above mercury; in lasers; wherever an inert atmosphere is desired and the much cheaper nitrogen cannot be used; in ionization chambers and particle counters; in mixtures with He and Ne in Geiger counters; in argon-oxygen-decarburizing process for stainless steel; in manufacture of semiconducting devices; in gas mixtures as the working fluid in plasma arc devices. Liquid as cryogen to produce low temperetures. The isotope 40Ar is always found in minerals contg potassium, since it is a product of 40K decay; measuring the amount of 40Ar and 40K can be used for determining the geologic age of minerals and meteors.
DefinitionA nonmetallic element of atomic number 18, in the noble gas group of the Periodic System. Aw 39.948. Present in atmosphere to 0.94% by volume.
General DescriptionA colorless odorless noncombustible gas. Heavier than air and can asphyxiate by displacement of air. Exposure of the container to prolonged heat or fire can cause Argon to rupture violently and rocket . If liquefied, contact of the very cold liquid with water may cause violent boiling. If the water is hot, there is the possibility that a liquid "superheat" explosion may occur. Contacts with water in a closed container may cause dangerous pressure to build.
Reactivity ProfileThese substances undergo no chemical reactions under any known circumstances. They are nonflammable, noncombustible and nontoxic. They can asphyxiate.
Health HazardVapors may cause dizziness or asphyxiation without warning. Vapors from liquefied gas are initially heavier than air and spread along ground.
Fire HazardNon-flammable gases. Containers may explode when heated. Ruptured cylinders may rocket.
Safety ProfileA simple asphyxlant gas. As an inert gas, it has no specific inherent dangerous properties. Gases of this type have no specific toxicity effect, but they act by excluding O2 from the lungs. The effect of simple asphyxiant gases is proportional to the extent to whch they dirmnish the amount (partial pressure) of O2 in the air that is breathed. The oxygen may be diminished to 75% of its normal percentage in air before appreciable symptoms develop, and t h s in turn requires the presence of a simple asphyxiant in a concentration of 33% in the mixture of air and gas. When the simple asphyxiant reaches a concentration of 50%, marked symptoms can be produced. A concentration of 75% is fatal in a matter of minutes. The first symptoms produced by simple asphyxiant gases such as argon are rapid respirations and air hunger. Mental alertness is diminished and muscular coordination is impaired. Later, judgment becomes faulty and all sensations are depressed. Emotional instability often results and fatigue occurs rapidly. As the asphyxia progresses, there may be nausea and vomiting, prostration, and loss of consciousness, and finally, convulsions, deep coma, and death.
Potential ExposureArgon is used in metal fabrication and steel making; as an inert gas shield in arc welding; as an inert atmosphere in electric lamps; as a blanketing agent in metals refining (especially titanium and zirconium).
First aidIf contact with liquid argon occurs, 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 warm water. Seek medical attention immediately. If this chemical has been inhaled, remove from exposure, begin rescue breathing (using universal precautions, including resuscitation mask) if breathing has stopped and CPR if heart action has stopped. Transfer promptly to a medical facility.
ShippingUN1006 Argon, compressed, Hazard Class: 2.2; Labels: 2.2-Nonflammable compressed gas. Cylinders must be transported in a secure upright position, in a wellventilated 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 MethodsArgon is rendered oxygen-free by passage over reduced copper at 450o, or by bubbling through alkaline pyrogallol and H2SO4, then dried with CaSO4, Mg(ClO4)2, or Linde 5A molecular sieves. Other purification steps include passage through Ascarite (CARE: asbestos impregnated with sodium hydroxide), through finely divided uranium at about 800o and through a -78o cold trap. Alternatively the gas is passed over CuO pellets at 300o to remove hydrogen and hydrocarbons, over Ca chips at 600o to remove oxygen and, finally, over titanium chips at 700o to remove nitrogen. It has also been purified by freeze-pump-thaw cycles and by passage over sputtered sodium [Arnold & Smith J Chem Soc, Faraday Trans 2 77 861 1981]. Arsenic acid (arsenic pentoxide hydrate, arsenic V oxide hydrate, orthoarsenic acid) [12044-50-7] M 229.8 + xH2O, pK 1 2.26, pK 2 6.76, pK 3 11.29 (H3AsO4). The acid crystallises from concentrated solutions of boiling conc HNO3 as rhombic crystals. Dry it in a vacuum to give the hemihydrate (hygroscopic). Heating above 300o yields As2O5. [Thaler Z Anorg Allgem Chem 246 19 1941, Schenk in Handbook of Preparative Inorganic Chemistry (Ed. Brauer) Academic Press Vol I p 601 1963.]
Waste DisposalVent to atmosphere. Return refillable compressed gas cylinders to supplier.
Tag:Argon(7440-37-1) Related Product Information
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