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HCID 23968Erstellt: 4. November 2026

Argon

argon atom · ARGON (PURE GAS) 1X14L SCOTTY 14 99.995% · 18Ar · Argon · Ar-36 · Ar-38 · Ar-40 · argon(0)

https://huagongshe.com/de/chemical/23968

Molekülstruktur von Argon

Identifikatoren & physikalische Daten

CAS No.1290046-39-7
SummenformelAr
Durchschnittliche Molmasse39,9 g/mol
Monoisotopische Masse39,96238312 g/mol
SMILES[Ar]
InChIKeyXKRFYHLGVUSROY-UHFFFAOYSA-N
PubChem CID23968
ChEBICHEBI:49474
EC No.231-147-0
DTXSIDDTXSID3052482
Lokaler NameArgon

Chemische & physikalische Eigenschaften

Polarare Oberfläche (TPSA)0
H-Brücken-Donoren0
H-Brücken-Akzeptoren0
Frei drehbare Bindungen0
Schwere Atome1
Formalladung0
Komplexität0
StoffklassenToxic Gases & Vapors -> Simple Asphyxiants
SpringerMaterials PropertiesCompton scattering
LogP (Verteilungskoeffizient)0.740.94
GeruchOdorless
GeschmackTasteless
Dichte1.633 g/LInert gas. Critical density: 535.7 kg/cu mSolid: density (triple point): 1623 kg/cu mheat of fusion (triple point):1.191 kJ/mol, exists as face-centered cubic crystals at normal pressure1.784(0℃)
Color/FormColorless monatomic gas
LöslichkeitSoluble in organic liquidsSolubility of gas in water at 20 °C: 33.6 cu cm/kg waterArgon is two and one half times as soluble in water as nitrogen, having about the same solubility as oxygen.Slightly soluble in waterSolubility in water, ml/100ml at 20 °C: 3.4slightly soluble in H2O33.6mL/1000g H2O (20°C) [KIR78]Henry’s law constants, k×104: 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]
Animal DrugsPharmaceuticals -> UK Veterinary Medicines Directorate List
Siedepunkt-185.847 °C-185.9 °C-185.7 °C @760 [mm Hg]-185.7 °C(lit.)
Schmelzpunkt-186.36 °C triple point (69 kPa)-189.4 °C-189.2 °C-189.2 °C(lit.)
Dampfdichte1.38 (Air = 1)Relative vapor density (air = 1): 1.661.38 (21 °C, vs air)
Aggregatzustandcolorless gas
Farbecolorless
Spezifische WärmekapazitätCp(gas): 0.52 J/(g·K), at 25℃
Merck13,788
Henry-Konstante1.4×10-5 mol/(m3Pa) at 25℃, Warneck and Williams (2012)
Dielektrizitätskonstante1.5(-191℃)
StabilitätStable. Inert.
Kosmetik-Inhaltsstoffe FunktionenANTIOXIDANT
InChI1S/Ar
InChIKeyXKRFYHLGVUSROY-UHFFFAOYSA-N
SMILES[Ar]
LogP (Verteilungskoeffizient)0.740 (est)
CAS Datenbank7440-37-1(CAS DataBase Reference)
NIST chemische InformationenArgon(7440-37-1)
EPA chemische InformationenArgon (7440-37-1)

Sicherheit & Vorschriften

GHS-EinstufungThis chemical does not meet GHS hazard criteria for 0.6% (4 of 643) of reports.WarningH280 (68%): Contains gas under pressuremay explode if heated [Warning Gases under pressure]P282, P336+P317, P403, and P410+P403 (click each P-code to see the statement)Aggregated GHS information provided per 643 reports by companies from 10 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.
Regulatorische InformationenChemical: ArgonArgon is listed on the EPA's Chemical Data Reporting (CDR) system. Manufacturers and importers of Argon are required to report information about their production and use of this chemical to the EPA under the Toxic Substances Control Act (TSCA). (40 eCFR Part 711)Argon: Non hazardousThe New Jersey Worker and Community Right to Know Act requires public and private employers to provide information about hazardous substances at their workplaces. (N.J.S.A. 34:5A-1 et. seq.)
Weitere SicherheitsinformationenIMAP assessments - Argon: Human health tier I assessment
DOT-KennzeichnungNon-Flammable Gas
BrandgefahrenExcerpt from ERG Guide 120 [Gases - Inert (Including Refrigerated Liquids)]:· Non-flammable gases.Not combustible. Heating will cause rise in pressure with risk of bursting.
GesundheitsgefahrenExcerpt from ERG Guide 120 [Gases - Inert (Including Refrigerated Liquids)]:· Vapors may cause dizziness or asphyxiation without warning, especially when in closed or confined areas.
GefahrenübersichtSimple asphyxiantEvaporating liquid can cause frostbite[ICSC]
DOT-Nummer und Handbuch1006 1201951 120
Reaktive GruppeNot Chemically Reactive
UN-EinstufungUN Hazard Class: 2.2

Anwendungen & Verwendung

Beschreibung

Argon belongs to the family of inert, rare gases of the atmosphere. It is plentiful compared to the other rare atmospheric gases; I million ft3 (28 300 m3) of dry air contains 9340 ft3 (264 m3 ) of argon. Argon is colorless, odorless, tasteless, and nontoxic. It is extremely inert and forms no known chemical compounds. It is slightly soluble in water.

Occurrence

Argon is the 56th most abundant element on Earth. It is the most abundant of all the noblegases found in the atmosphere. In fact, the only source of argon is the atmosphere, where it isfound at just under 1% of air by volume. There are several methods of producing argon. The most common is by fractional distillationof liquid air. Argon is collected as a by-product of this large-scale commercial process.During fractional distillation, argon boils off at its own unique temperature. It is then collectedand purified by passing it through charcoal to filter out helium and other gases, producingsignificant amounts of argon.

History

Argon was discovered by a Scottish chemist, Sir William Ramsay and an English chemist, Lord Rayleigh in 1894. However, an English scientist, Henry Cavendish identified the presence of argon 200 years before its discovery when he found a small amount of gas left behind while separating nitrogen and oxygen from air. Although he anticipated the presence of another element in the air, he was unable to confirm that. Ramsay repeated Cavendish's experiment in 1894 and analyzed the left over unknown gas using spectroscopy. Meanwhile, Rayleigh was also performing the same experiment, almost at the same time. Both the scientists together revealed the unidentified gas and named it Argon.

Verwenden

Gas 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.

Reactivity ProfileThese substances undergo no chemical reactions under any known circumstances. They are nonflammable, noncombustible and nontoxic. They can asphyxiate.These substances undergo no chemical reactions under any known circumstances. They are nonflammable, noncombustible and nontoxic. They can asphyxiate. Contact of very cold liquefied gas with water may result in vigorous or violent boiling of the product and extremely rapid vaporization due to the large temperature differences involved. If the water is hot, there is the possibility that a liquid "superheat" explosion may occur. Pressures may build to dangerous levels if liquid gas contacts water in a closed container [Handling Chemicals Safely 1980].
Physical DangersThe gas is heavier than air and may accumulate in lowered spaces causing a deficiency of oxygen.
DOT Emergency Guidelines/GUIDE 120: GASES - INERT (INCLUDING REFRIGERATED LIQUIDS)/ Health: Vapors may cause dizziness or asphyxiation without warning. Vapors from liquefied gas are initially heavier than air and spread along ground. Contact with gas or liquefied gas may cause burns, severe injury and/or frostbite. /Argon, refrigerated liquid (cryogenic liquid)//GUIDE 120: GASES - INERT (INCLUDING REFRIGERATED LIQUIDS)/ Fire or Explosion: Non-flammable gases. Containers may explode when heated. Ruptured cylinders may rocket. /Argon, refrigerated liquid (cryogenic liquid)//GUIDE 120: GASES - INERT (INCLUDING REFRIGERATED LIQUIDS)/ Public Safety: CALL Emergency Response Telephone Number ... As an immediate precautionary measure, isolate spill or leak area for at least 100 meters (330 feet) in all directions. Keep unauthorized personnel away. Stay upwind. Many gases are heavier than air and will spread along ground and collect in low or confined areas (sewers, basements, tanks). Keep out of low areas. Ventilate closed spaces before entering. /Argon, refrigerated liquid (cryogenic liquid)//GUIDE 120: GASES - INERT (INCLUDING REFRIGERATED LIQUIDS)/ Protective Clothing: Wear positive pressure self-contained breathing apparatus (SCBA). Structural firefighters' protective clothing will only provide limited protection. Always wear thermal protective clothing when handling refrigerated/cryogenic liquids or solids. /Argon, refrigerated liquid (cryogenic liquid)/For more DOT Emergency Guidelines (Complete) data for Argon, Elemental (16 total), please visit the HSDB record page.
BrandbekämpfungExcerpt from ERG Guide 120 [Gases - Inert (Including Refrigerated Liquids)]:In case of fire in the surroundings, use appropriate extinguishing media.
Erste-Hilfe-MaßnahmenFresh air, rest. Artificial respiration may be needed. Refer for medical attention.ON FROSTBITE: rinse with plenty of water, do NOT remove clothes. Refer for medical attention .First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then refer for medical attention.
Freisetungsmaßnahmen· CALL 911. Then call emergency response telephone number on shipping paper. If shipping paper not available or no answer, refer to appropriate telephone number listed on the inside back cover.· Do not touch or walk through spilled material.
Erste HilfeExcerpt from ERG Guide 120 [Gases - Inert (Including Refrigerated Liquids)]:General First Aid:
Sichere LagerungFireproof if in building. Keep in a well-ventilated room.
Expositionsschutz und Persönliche Schutzausrüstung· Wear positive pressure self-contained breathing apparatus (SCBA).
BrandbekämpfungsverfahrenIf material involved in fire: Extinguish fire using agent suitable for type of surrounding fire. Material itself does not burn or burns with difficulty. Cool all affected containers with flooding quantities of water. Apply water from as far a distance as possible. /Argon, compressedArgon, refrigerated liquid/If material involved in fire: Do not use water on material itself. /Argon, refrigerated liquid/Suitable extinguishing media: Use water spray, alcohol-resistant foam, dry chemical or carbon dioxide. Special protective equipment for fire-fighters: Wear self contained breathing apparatus for fire fighting if necessary.
LagerbedingungenKeep container tightly closed in a dry and well-ventilated place. Contents under pressure.
ReinigungsverfahrenPersonal precautions: Avoid breathing vapors, mist or gas. Environmental precautions: No special environmental precautions required. Methods for cleaning up: Wipe up with absorbent material (e.g. cloth, fleece).
Freisetung ohne BrandExcerpt from ERG Guide 120 [Gases - Inert (Including Refrigerated Liquids)]:
EntsorgungsverfahrenSRP: The most favorable course of action is to use an alternative chemical product with less inherent propensity for occupational harm/injury/toxicity or environmental contamination. Recycle any unused portion of the material for its approved use or return it to the manufacturer or supplier. Ultimate disposal of the chemical must consider: the material's impact on air qualitypotential migration in soil or watereffects on animal and plant lifeand conformance with environmental and public health regulations.
Verschüttetes entsorgenPersonal protection: self-contained breathing apparatus. Ventilation. NEVER direct water jet on liquid.
Unerwünschte WirkungenOther Poison - Simple Asphyxiant
ExpositionspfadeThe substance can be absorbed into the body by inhalation.
Signs and SymptomsDizziness. Lethargy. Headache. Suffocation.ON CONTACT WITH LIQUID: FROSTBITE.
Natural Pollution SourcesStable naturally occurring isotopes (mass numbers): 36 (0.377%)38 (0.063%)40 (99.600%) ... Abundance in igneous rock of the earth's crust: 4X10-2 ppm by weight ... The isotope As(40) is always found in minerals containing potassium, since it is a product of K(40) decay.In the earth's atmosphere, noble gases make up about 1% ... argon is their major component.The atmosphere of Mars contains 1.6% of argon-40 and 5 ppm of argon-36.
Atmospheric ConcentrationsConcentration in atmosphere: 93.40 ppm by volumeThe atmosphere of Mars contains 1.6% of argon-40 and 5 ppm of argon-36.
Human Toxicity Excerpts/SIGNS AND SYMPTOMS/ Contact with the liquid will cause frostbite./Argon, refrigerated liquid//CASE REPORTS/ A 31-year-old engineer was found dead in a reaction vessel (diameter 0.8 m, height 1.8 m) of a bulb factory some minutes after he had entered it for repair work. Resuscitation attempts with artificial respiration were unsuccessful. Despite autopsy and usual toxicological analyses, no cause of death could be found. Since in the normal production process, argon was used as a protecting gas, the possibility of suffocation in an argon atmosphere was investigated. This was rendered more difficult because of the natural content of 0.93 vol.% argon in air and since the excessive argon could have been removed by the resuscitation attempts. Gas samples from larynx, esophagus, bronchi, and stomach, separated blood samples from both ventricles of the heart and from the vena iliaca externa as well as tissue samples from lung and liver were collected during autopsy into headspace vials in such a way that the loss of gas and a dilution by surrounding air was avoided as far as possible. The samples were analyzed by headspace GC-MS. The abundance of Ar+ (m/z = 40) was used for quantification with N2(2+) (m/z = 14) as internal standard. The following argon concentrations were measured (mean values, case under investigation/comparison cases): gas from larynx 1.79/0.96 vol.%, stomach gas 1.58/0.89 vol.%, heart blood (left ventricle) 7.2/2.7 microg/mL, heart blood (right ventricle) 5.8/2.7 microg/mL, blood from vena iliaca externa 3.6/2.7 microg/mL. A clearly increased concentration was also found in lung tissue, whereas in liver tissue no significant difference in comparison to other cases was measured. From the results, it follows that the deceased inhaled an increased amount of argon a short time before death. The concentrations are consistent with asphyxia and subsequent resuscitation attempts. .../CASE REPORTS/ ... /A/ fatality from argon gas emboli during prostate cryosurgery /is reported/. The decedent underwent cryotherapy for prostate carcinoma using cryoablation probes which were cooled with argon and nitrous oxide and warmed with helium. Minutes into the procedure he experienced sudden cardiovascular collapse and could not be resuscitated. Postmortem examination was performed ... . Collection of tissues and blood samples had to be conducted carefully to capture suspected noble gases, argon, and helium. Specimens were submitted ... for toxicological examination and for evaluation of the composition of the gas retrieved from the vascular system. Gas chromatography mass spectrometric analyses confirmed argon in blood, brain, liver, and gas retrieved from the aorta. These samples had significant argon compared with room air also sent for comparison. The manner of death was accident. ...
Non-Human Toxicity Excerpts/LABORATORY ANIMALS: Acute Exposure/ ... Carbon dioxide, argon, and nitrogen /were compared/ for inducing unconsciousness and euthanasia of Sprague-Dawley rats. We determined time to unconsciousness and monitored heart rate and mean arterial blood pressure by radiotelemetry to assess stress, recovery after exposure, and time of death. Unconsciousness (mean +/- standard error) occurred 24 +/- 3, 87 +/- 8, and 93 +/- 8 seconds after short-term exposure to carbon dioxide, argon, and nitrogen, respectively. During exposure, carbon dioxide depressed heart rate, whereas argon and nitrogen increased heart rate. Upon removal from the chamber, rats' heart rate rapidly normalized after carbon dioxide or nitrogen but remained elevated for 60 min after argon. During exposure, all agents depressed MAP, which returned to resting levels 10 to 50 min after rats removal from the chamber. For euthanasia, carbon dioxide at approximately 100% induced unconsciousness in 37 +/- 3 seconds, increased and then depressed mean arterial blood pressure and heart rate, and caused death at 188 +/- 15 seconds. Carbon dioxide at approximately 30% induced unconsciousness in 150 +/- 15 seconds, decreased heart rate and mean arterial blood pressure, and induced death at 440 +/- 9 seconds. Argon at approximately 100% increased mean arterial blood pressure but decreased heart rate, induced unconsciousness with hyperreflexia at 54 +/- 4 seconds, and caused death at 197 +/- 20 seconds. Nitrogen at approximately 100% decreased mean arterial blood pressure but not heart rate and produced unconsciousness with hyperreflexia at 164 +/- 17 seconds and death at 426 +/- 28 seconds. ... Carbon dioxide effectively produced unconsciousness and euthanasia, but we were unable to ascertain distress. Argon also appears effective but produced hyperreflexia and tachycardia. Nitrogen was ineffective.
Probable Routes of Human ExposureAccording to the 2006 TSCA Inventory Update Reporting data, the number of persons reasonably likely to be exposed in the industrial manufacturing, processing, and use of argon is 1 to 99the data may be greatly underestimated(1).
Environmental Water ConcentrationsGROUNDWATER: Argon concentrations ranged from 13.1 to 17.2 micromoles/L (median 15.5 micromoles/L) in samples of groundwater from Orangeburg County, SC, collected in November 1997(1). Argon was reported at a concentration range of 0.7515 to 1.0923 mg/L in ground water samples taken at Mirror Lake, New Hampshire in 1991 and 1992(2).
Antidote and Emergency TreatmentImmediate first aid: Ensure that adequate decontamination has been carried out. If patient is not breathing, start artificial respiration, preferably with a demand-valve resuscitator, bag-valve-mask device, or pocket mask, as trained. Perform CPR as necessary. Immediately flush contaminated eyes with gently flowing water. Do not induce vomiting. If vomiting occurs, lean patient forward or place on left side (head-down position, if possible) to maintain an open airway and prevent aspiration. Keep patient quiet and maintain normal body temperature. Obtain medical attention. /Simple asphyxiants and related compounds/Basic treatment: Establish a patent airway (oropharyngeal or nasopharyngeal airway, if needed). Suction if necessary. Watch for signs of respiratory insufficiency and assist ventilations if necessary. Administer oxygen by nonrebreather mask at 10 to 15 L/min. Anticipate seizures and treat if necessary ... . Use rapid rewarming techniques if frostbite occurs ... . /Simple asphyxiants and related compounds/Advanced treatment: Consider orotracheal or nasotracheal intubation for airway control in the patient who is unconscious or is in severe respiratory distress. Monitor cardiac rhythm and treat arrhythmias if necessary ... . Start IV administration of D5W /SRP: "To keep open", minimal flow rate/. Treat seizures with diazepam or lorazepam ... . /Simple asphyxiants and related compounds/
F4.5-31
Wassergefährdungsklasse (WGK)-
TSCA-Inventar-StatusTSCA listed
UN-TransportnummerUN 1951 2.2 (ARGON, REFRIGERATED LIQUID)
RTECS-Nr.CF2300000
Sicherheitshinweise (S)38
Gefahrenklasse2.2Press. Gas Compr. Gas
Lagerklasse2A - Gases
DOT Classification2.2 (Nonflammable gas)
Gefahrstoffdaten7440-37-1(Hazardous Substances Data)