AIR
Oxygen
CAS: 7782-44-7;132259-10-0
Molecular Formula: O2
AIR - Names and Identifiers
| Name | Oxygen |
| Synonyms | AIR Oxygen Dioxygen hyperoxia CAL-MAT AIR liquidoxygen Liquid-oxygen- HYDROGEN AND OXYGEN AUTOMOTIVE STANDARD R99-5 AUTOMOTIVE STANDARD R99-6 OXYGEN, PRESSURE TIN WITH 1 L COMPRESSED AIR, BREATHING AIR Air, refrigerated liquid (cryogenic liquid). 1-(5-O-phosphono-beta-D-ribofuranosyl)-1H-imidazol-5-amine |
| CAS | 7782-44-7 132259-10-0 |
| EINECS | 231-956-9 |
| InChI | InChI=1/C8H14N3O7P/c9-5-1-10-3-11(5)8-7(13)6(12)4(18-8)2-17-19(14,15)16/h1,3-4,6-8,12-13H,2,9H2,(H2,14,15,16)/t4-,6-,7-,8-/m1/s1 |
AIR - Physico-chemical Properties
| Molecular Formula | O2 |
| Molar Mass | 32 |
| Density | 1.429（0℃） |
| Melting Point | −218°C(lit.) |
| Boling Point | −183°C(lit.) |
| Flash Point | 421.9°C |
| 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] |
| Solubility | At 20 °C and at a pressure of 101 kPa, 1 volume dissolves in about 32 volumes of water. |
| Vapor Presure | >760 mmHg at 20 °C |
| Vapor Density | 1.11 (vs air) |
| Appearance | colorless gas |
| Color | Colorless gas, liquid, or hexagonal crystals |
| Odor | Odorless gas |
| Merck | 13,7033 |
| Storage Condition | -20°C |
| Stability | Stable. Vigorously supports combustion. Incompatible with phosphorus, organic materials, many powdered metals. |
| Refractive Index | 1.776 |
| Physical and Chemical Properties | Characteristics of colorless, transparent, odorless, tasteless gas. relative density 1.429(0 ℃) solubility is not soluble in water, slightly soluble in alcohol. |
| Use | For metal cutting and welding, steel, medical, defense, electronics, chemical, metallurgy and other sectors |
AIR - Risk and Safety
| Risk Codes | R8 - Contact with combustible material may cause fire R52/53 - Harmful to aquatic organisms, may cause long-term adverse effects in the aquatic environment. R34 - Causes burns R48/20/22 - R37 - Irritating to the respiratory system |
| Safety Description | S17 - Keep away from combustible material. S45 - In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) S36/37/39 - Wear suitable protective clothing, gloves and eye/face protection. S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S61 - Avoid release to the environment. Refer to special instructions / safety data sheets. |
| UN IDs | UN 1072 2.2 |
| WGK Germany | - |
| RTECS | RS2060000 |
| FLUKA BRAND F CODES | 4.5-31 |
| Hazard Class | 2.2 |
| Toxicity | OSHA recommends a minimum oxygen concentration of 19.5% for human occupancy. |
AIR - Upstream Downstream Industry
AIR - Nature
Open Data Verified Data
under normal temperature and pressure for colorless, odorless, tasteless gas. Oxygen is non-flammable, but it is combustion-supporting. d0 (gas) 1. d-183 (liquid) 1.14g/rnL; Melting point -218.4 °c; Boiling point -182. 96 C, a critical temperature of 118. 95 ℃; Critical pressure 50. 14ATM; Heat of vaporization 50. 9cal/g (-183 C) (J lcal = 4.2). When cooled to -182.9 °c under normal pressure, it is a sky blue transparent liquid.
Last Update：2024-01-02 23:10:35
AIR - Preparation Method
Open Data Verified Data
with the oxygen produced by the air separation unit as the raw material, more than 99.5% of the oxygen is obtained after two-stage rectification, and then it enters the high purity oxygen tower. After two low-temperature rectification, 99. More than 995% of the high purity oxygen.
Last Update：2022-01-01 08:54:54
AIR - Use
Open Data Verified Data
high purity oxygen gas is mainly used for thermal oxidation, diffusion, chemical vapor deposition and plasma etching of semiconductor devices, and can also be used for optical fiber, color picture tube manufacturing and standard gas, correction gas and zero point gas, etc. As a source of oxidation and a reactive agent that produces high-purity water. For the MOS field effect device, the oxide layer must be quite dense, and the dry oxidation is carried out by using high purity oxygen. The oxide layer has a compact structure, less positive charge and high pressure resistance, which can meet the production needs. Mixed with carbon tetrafluoride, can be used for plasma etching.
Last Update：2022-01-01 08:54:55
AIR - Safety
Open Data Verified Data
combustion-supporting compressed gas, non-toxic. However, exposure to high concentrations of oxygen has adverse effects on the lungs and central nervous system. All combustible substances, especially oils and greases, shall not be exposed to high concentrations of oxygen. All possible sources of ignition must be closed or withdrawn. In a cool place, it is strictly prohibited to approach with acid, alkali, grease, flammable and explosive articles, high temperature heat source and electric spark, and avoid impact.
Last Update：2022-01-01 08:54:55
AIR - Nature
| vapor density | 1.11 (vs air) |
| Vapor pressure | >760 mmHg at 20 °C |
| storage conditions | -20°C |
| solubility | At 20°C and at a pressure of 101 kPa, 1 volume dissolves in about 32 volumes of water. |
| morphology | colorless gas |
| color | Colorless gas, liquid, or hexagonal crystals |
| Odor | Odorless 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. |
| NIST chemical information | Oxygen(7782-44-7) |
| EPA chemical information | Oxygen (7782-44-7) |
Last Update：2024-04-10 22:29:15
AIR - Security information
| WGK Germany | - |
| RTECS number | RS2060000 |
| F | 4.5-31 |
| HazardClass | 2.2 |
| toxic substance data | 7782-44-7(Hazardous Substances Data) |
| Toxicity | OSHA recommends a minimum oxygen concentration of 19.5% for human occupancy. |
Last Update：2024-04-10 22:29:15
AIR - Reference Information
| NIST chemical information | Information provided by: webbook.nist.gov (external link) |
| EPA chemical information | Information provided by: ofmpub.epa.gov (external link) |
| Introduction | Oxygen (English: Oxygen) is the most common elemental form of oxygen, which accounts for about 21% in the air by volume fraction. Under standard conditions It is a gas, not easily soluble in water, and has a slightly higher density than air. The density of oxygen is 1.429g/L. Non-flammable, can support combustion. |
| Molecular structure | Oxygen is composed of oxygen molecules (O2). Each oxygen molecule consists of 2 oxygen atoms. Oxygen is a diatomic molecule. Two oxygen atoms form a covalent bond, one 2p orbital forms a σ bond, and the other two 2p orbitals form a π bond. Its molecular orbital formula is (σ1s)2(σ1s *)2(σ2s)2(σ2s *)2(σ2s *)2(σ2p)2(π2p)4(π2p *)2, so oxygen is odd electron molecule with paramagnetic. |
| Discovery history | Oxygen was first discovered by Karl Wilhelm Scheler, and Joseph Priestley also successfully discovered it later, but because Joseph first Published papers, so many people still think that oxygen was first discovered by Joseph. The English name of oxygen is "Dioxygen", which was named by Lavoisier in 1777. His experiments using oxygen defeated the popular phonlogon theory in terms of combustion and corrosion. |
| Uses | The use of oxygen includes the smelting of steel, the manufacture of plastics and textiles, and the use of rocket propellants and oxygen therapy. It is also used in aircraft and submarines., Spacecraft, diving and fire support life. used in metal cutting and welding, steelmaking, used in medical, national defense, electronics, chemical, metallurgy and other industries used in optical fiber preparation, electric vacuum research, and can also be used in semiconductor device preparation, In-process thermal oxidation, epitaxial diffusion, chemical vapor deposition, etc. used in hospital rescue patients and clinical treatment used in metal welding and cutting. Mixing with acetylene can obtain extremely high flame temperature to melt the metal, which is widely used in smelting and top-blowing oxygen steelmaking. Mixing with water vapor can be used instead of blowing air into the gas gasifier to obtain gas with higher calorific value. Medically used in oxidation therapy to treat pneumonia, gas poisoning, etc. The chemical industry is used to strengthen the production of nitric acid and sulfuric acid. Liquid oxygen can be used as a fuel for liquid oxygen explosives and rocket propellants. gas for packaging. Used in metal cutting and welding, steelmaking, medical, national defense, electronics, chemical, metallurgy and other departments. Used for making liquid oxygen explosives, metal cutting and welding, etc. |
| Laboratory preparation method | Small-scale oxygen production in the laboratory generally heats the mixture of potassium chlorate and catalyst manganese dioxide to generate oxygen and potassium chloride. Among them, manganese dioxide is the catalyst. The generator is of solid heating type and requires the use of test tubes. The oxygen produced by this method is usually mixed with a small amount of pungent gas chlorine. |
| solubility in water (g/100ml) | dissolution grams per 100ml of water at different temperatures (℃): 1.52 × 10-2/30 ℃;1.17 × 10-2/10 ℃;9.4 × 10-3/20 ℃;7.8 × 10-3/30 ℃;6.2 × 10-3/40 ℃ |
| toxicity | toxicity is mainly manifested as damage to respiratory tract, especially lung, and edema will occur in severe cases. Maximum allowable concentration: the threshold concentration of oxygen (such as oxygen therapy) is 25% ~ 40%. Specific regulations should be strictly observed when using compressed oxygen in diving work. The size of the pressure and the length of the stay should be limited. Hypoxia causes suffocation, while excess oxygen supply causes poisoning. |
| Production method | The air after the air separation method first removes dust and mechanical impurities is compressed in the compressor. Remove carbon dioxide from compressed air. Dry compressed air, through liquefaction, rectification, separation into oxygen and nitrogen, oxygen storage in the oxygen cabinet, liquid oxygen into the storage tank, compressed oxygen filling oxygen cylinder. Hydrogenation water is connected with direct current in the electrolyzer, and the water is decomposed into oxygen and hydrogen. This method can produce pure hydrogen and by-product oxygen. |
| category | harmful gases |
| toxicity classification | low toxicity |
| acute toxicity | inhalation-human TCL0: 100000 PPM/14 hours |
| explosive hazard characteristics | explosive mixed with organic matter |
| flammability hazard characteristics | combustion support; prevent burns |
| storage and transportation characteristics | warehouse ventilation and low temperature drying; Store separately from reducing agent and combustible |
| fire extinguishing agent | mist water, carbon dioxide |
| toxic substance data | information provided by: pubchem.ncbi.nlm.nih.gov (external link) |
Last Update：2024-06-12 15:23:42
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AIR
Caprylic triglyceride
Ferrate(3-), tris(oxalato)-, triammonium
Ammonium, tetraethyl-, nitrate
4-[(4,6-Dimethylpyrimidin-2-Yl)Thio]Aniline
(S) 1-BOC-3-hydroxylpyrrolidine
POLY(ETHYLENE SUCCINATE)
丙纶油剂
异辛酯
Caprylic triglyceride
Ferrate(3-), tris(oxalato)-, triammonium
Ammonium, tetraethyl-, nitrate
4-[(4,6-Dimethylpyrimidin-2-Yl)Thio]Aniline
(S) 1-BOC-3-hydroxylpyrrolidine
POLY(ETHYLENE SUCCINATE)
丙纶油剂
异辛酯
Raw Materials for AIR
Downstream Products for AIR