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水素

水素 化学構造式
1333-74-0
CAS番号.
1333-74-0
化学名:
水素
别名:
水素分子;H2ガス;水素ガス;二水素
英語化学名:
Hydrogen
英語别名:
H2;HYDROGE;PROTIUM;HYDROGEN;diprotium;p-Hydrogen;o-Hydrogen;Dihydrogen;hydrogengas;Wasserstoff
CBNumber:
CB7686195
化学式:
H2
分子量:
2.02
MOL File:
1333-74-0.mol

水素 物理性質

融点 :
−259.2 °C(lit.)
沸点 :
−252.8 °C(lit.)
比重(密度) :
0.0899
蒸気密度:
0.07 (21 °C, vs air)
蒸気圧:
Critical temperature is - 239.9 °C; noncondensible above this temperature
闪点 :
<-150°C
酸解離定数(Pka):
35(at 25℃)
外見 :
colorless gas
臭い (Odor):
Odorless gas
爆発限界(explosive limit):
74.2%
水溶解度 :
0.00017 g/100 mL
Merck :
13,4813
安定性::
Stable. Highly flammable. Readily forms explosive mixtures with air. Upper (U.K.) composition limit for use of a nitrogen/hydrogen mixture in the open lab is 5.7% hydrogen.
CAS データベース:
1333-74-0(CAS DataBase Reference)
NISTの化学物質情報:
Hydrogen(1333-74-0)
EPAの化学物質情報:
Hydrogen(1333-74-0)
安全性情報
  • リスクと安全性に関する声明
  • 危険有害性情報のコード(GHS)
主な危険性  F+
Rフレーズ  12
Sフレーズ  9-16-33
RIDADR  UN 1950 2.1
WGK Germany  -
RTECS 番号 MW8900000
4.5-31
自然発火温度 500 to 590 °C
国連危険物分類  2.1
有毒物質データの 1333-74-0(Hazardous Substances Data)
毒性 TLV-TWA (ACGIH) None established; simple asphyxiant
絵表示(GHS)
注意喚起語 Danger
危険有害性情報
コード 危険有害性情報 危険有害性クラス 区分 注意喚起語 シンボル P コード
H220 極めて可燃性/引火性の高いガス 可燃性/引火性ガス 1 危険 P210, P377, P381, P403
H280 加圧ガス;熱すると爆発のおそれ 高圧ガス 高圧ガス
液化ガス
溶解ガス
警告 P410+P403
注意書き
P210 熱/火花/裸火/高温のもののような着火源から遠ざ けること。-禁煙。
P377 漏洩ガス火災の場合:漏えいが安全に停止されな い限り消火しないこと。
P381 安全に対処できるならば着火源を除去すること。
P410+P403 日光から遮断し、換気の良い場所で保管するこ と。

水素 価格

メーカー 製品番号 製品説明 CAS番号 包装 価格 更新時間 購入

水素 MSDS


Hydrogen

水素 化学特性,用途語,生産方法

定義

本品は、次の化学式で表される二原子気体分子である。

用途

硬化油、冶金、鉛工用、真空管、トランジスタ、電球、ガラス溶融気象観測、溶接、酸水素焔用、白金及び石英細工、その他アンモニアメタノール、塩酸の合成、石油合成(フィッシャー法)、冷却剤(液体水素)

化粧品の成分用途

酸化防止剤

化学的特性

Hydrogen,H2, is a tasteless,colorless, odorless gas that may be liquified by cooling under pressure. Hydrogen is used in welding, in the production of ammonia, methanol, and other chemicals, for the hydrogenation of oil and coal,and for the reduction of metallic oxide ores.It is obtained by the dissociation of water and as a by-product in the electrolysis of brine solutions. Molecular hydrogen at ambient temperature is relatively innocuous to most metals.However, atomic hydrogen is detrimental to most metals.

物理的性質

Hydrogen’s atom is the simplest of all the elements, and the major isotope (H-1) consists ofonly one proton in its nucleus and one electron in its K shell. The density of atomic hydrogenis 0.08988 g/l, and air’s density is 1.0 g/l (grams per liter). Its melting point is –255.34°C,and its boiling point is –252.87°C (absolute zero = –273.13°C or –459.4°F). Hydrogen hastwo oxidation states, +1 and –1.

同位体

The major isotope of hydrogen has just one proton and no neutrons in itsnucleus (1H-1).Deuterium (2D or H-2) has a nucleus consisting of one proton plus one neutron. Tritium (3T or H-3), another variety of heavy water (TOT),has nuclei consisting of one proton and two neutrons.

名前の由来

Hydrogen was named after the Greek term hydro genes, which means “water former.”

特性

H2 is a diatomic gas molecule composed of two tightly joined atoms that strongly sharetheir outer electrons. It is an odorless, tasteless, and colorless gas lighter than air. Hydrogenis included in group 1 with the alkali metals because it has an oxidation state of +1 as dothe other alkali metals. Experiments during the 1990s at the Lawrence Livermore NationalLaboratory (LLNL), in Livermore, California, lowered the temperature of H2 to almostabsolute zero. By exploding gunpowder in a long tube that contained gaseous hydrogen, thegas that was under pressure of over one million times the normal atmospheric pressure wascompressed into a liquid. This extreme pressure on the very cold gas converted it to liquidhydrogen (almost to the point of solid metallic hydrogen), in which state it did act as a metaland conduct electricity.Hydrogen gas is slightly soluble in water, alcohol, and ether. Although it is noncorrosive,it can permeate solids better than air. Hydrogen has excellent adsorption capabilities in theway it attaches and holds to the surface of some substances. (Adsorption is not the same asabsorption with a “b,” in which one substance intersperses another.

来歴

Hydrogen was prepared many years before it was recognized as a distinct substance by Cavendish in 1766. It was named by Lavoisier. Hydrogen is the most abundant of all elements in the universe, and it is thought that the heavier elements were, and still are, being built from hydrogen and helium. It has been estimated that hydrogen makes up more than 90% of all the atoms or three quarters of the mass of the universe. It is found in the sun and most stars, and plays an important part in the proton– proton reaction and carbon–nitrogen cycle, which accounts for the energy of the sun and stars. It is thought that hydrogen is a major component of the planet Jupiter and that at some depth in the planet’s interior the pressure is so great that solid molecular hydrogen is converted into solid metallic hydrogen. In 1973, it was reported that a group of Russian experimenters may have produced metallic hydrogen at a pressure of 2.8 Mbar. At the transition the density changed from 1.08 to 1.3 g/cm3. Earlier, in 1972, a Livermore (California) group also reported on a similar experiment in which they observed a pressure-volume point centered at 2 Mbar. It has been predicted that metallic hydrogen may be metastable; others have predicted it would be a superconductor at room temperature. On Earth, hydrogen occurs chiefly in combination with oxygen in water, but it is also present in organic matter such as living plants, petroleum, coal, etc. It is present as the free element in the atmosphere, but only to the extent of less than 1 ppm by volume. It is the lightest of all gases, and combines with other elements, sometimes explosively, to form compounds. Great quantities of hydrogen are required commercially for the fixation of nitrogen from the air in the Haber ammonia process and for the hydrogenation of fats and oils. It is also used in large quantities in methanol production, in hydrodealkylation, hydrocracking, and hydrodesulfurization. It is also used as a rocket fuel, for welding, for production of hydrochloric acid, for the reduction of metallic ores, and for filling balloons. The lifting power of 1 ft3 of hydrogen gas is about 0.076 lb at 0°C, 760 mm pressure. Production of hydrogen in the U.S. alone now amounts to about 3 billion cubic feet per year. It is prepared by the action of steam on heated carbon, by decomposition of certain hydrocarbons with heat, by the electrolysis of water, or by the displacement from acids by certain metals. It is also produced by the action of sodium or potassium hydroxide on aluminum. Liquid hydrogen is important in cryogenics and in the study of superconductivity, as its melting point is only a 20°C above absolute zero. Hydrogen consists of three isotopes, most of which is 1H. The ordinary isotope of hydrogen, H, is known as protium. In 1932, Urey announced the discovery of a stable isotope, deuterium (2H or D) with an atomic weight of 2. Deuterium is present in natural hydrogen to the extent of 0.015%. Two years later an unstable isotope, tritium (3H), with an atomic weight of 3 was discovered. Tritium has a half-lifeof about 12.32 years. Tritium atoms are also present in natural hydrogen but in a much smaller proportion. Tritium is readily produced in nuclear reactors and is used in the production of the hydrogen bomb. It is also used as a radioactive agent in making luminous paints, and as a tracer. On August 27, 2001 Russian, French, and Japanese physicists working at the Joint Institute for Nuclear Research near Moscow reported they had made “super-heavy hydrogen,” which had a nucleus with one proton and four neutrons. Using an accelerator, they used a beam of helium-6 nuclei to strike a hydrogen target, which resulted in the occasional production of a hydrogen-5 nucleus plus a helium-2 nucleus. These unstable particles quickly disintegrated. This resulted in two protons from the He-2, a triton, and two neutrons from the H-5 breakup. Deuterium gas is readily available, without permit, at about $1/l. Heavy water, deuterium oxide (D2O), which is used as a moderator to slow down neutrons, is available without permit at a cost of 6c to $1/g, depending on quantity and purity. About 1000 tons (4,400,000 kg) of deuterium oxide (heavy water) are now in use at the Sudbury (Ontario) Neutrino Observatory. This observatory is taking data to provide new revolutionary insight into the properties of neutrinos and into the core of the sun. The heavy water is on loan from Atomic Energy of Canada, Ltd. (AECL). The observatory and detectors are located 6800 ft (2072 m) deep in the Creighton mine of the International Nickel Co., near Sudbury. The heavy water is contained in an acrylic vessel, 12 m in diameter. Neutrinos react with the heavy water to produce Cherenkov radiation. This light is then detected with 9600 photomultiplier tubes surrounding the vessel. The detector laboratory is immensely clean to reduce background radiation, which otherwise hides the very weak signals from neutrinos. Quite apart from isotopes, it has been shown that hydrogen gas under ordinary conditions is a mixture of two kinds of molecules, known as orthoand parahydrogen, which differ from one another by the spins of their electrons and nuclei. Normal hydrogen at room temperature contains 25% of the para form and 75% of the ortho form. The ortho form cannot be prepared in the pure state. Since the two forms differ in energy, the physical properties also differ. The melting and boiling points of parahydrogen are about 0.1°C lower than those of normal hydrogen. Consideration is being given to an entire economy based on solarand nuclear-generated hydrogen. Located in remote regions, power plants would electrolyze sea water; the hydrogen produced would travel to distant cities by pipelines. Pollution-free hydrogen could replace natural gas, gasoline, etc., and could serve as a reducing agent in metallurgy, chemical processing, refining, etc. It could also be used to convert trash into methane and ethylene. Public acceptance, high capital investment, and the high present cost of hydrogen with respect to current fuels are but a few of the problems facing establishment of such an economy. Hydrogen is being investigated as a substitute for deep-sea diving applications below 300 m. Hydrogen is readily available from air product suppliers.

使用

In oxy-hydrogen blowpipe (welding) and limelight; autogenous welding of steel and other metals; manufacture of ammonia, synthetic methanol, HCl, NH3; hydrogenation of oils, fats, naphthalene, phenol; in balloons and airships; in metallurgy to reduce oxides to metals; in petroleum refining; in thermonuclear reactions (ionizes to form protons, deuterons (D) or tritons (T)). liquid hydrogen used in bubble chambers to study subatomic particles; as a coolant.

使用

Hydrogen is an excellent reducing agent.Production of ammonia (NH3).Ethanol (ethyl alcohol made from grains).Hydrogenation of vegetable oils.

定義

hydrogen: Symbol H. A colourlessodourless gaseous chemical element;a.n. 1; r.a.m. 1.008; d. 0.0899 g dm–3;m.p. –259.14°C; b.p. –252.87°C. It isthe lightest element and the mostabundant in the universe. It is presentin water and in all organic compounds.There are three isotopes:naturally occurring hydrogen consistsof the two stable isotopes hydrogen–1 (99.985%) and deuterium. Theradioactive tritium is made artificially.The gas is diatomic and hastwo forms: orthohydrogen, in whichthe nuclear spins are parallel, andparahydrogen, in which they are antiparallel.At normal temperaturesthe gas is 25% parahydrogen. In theliquid it is 99.8% parahydrogen. Themain source of hydrogen is steamreforming of natural gas. It can alsobe made by the Bosch process (seehaber process) and by electrolysis ofwater. The main use is in the Haberprocess for making ammonia. Hydrogenis also used in various other industrial processes, such as thereduction of oxide ores, the refiningof petroleum, the production ofhydrocarbons from coal, and the hydrogenationof vegetable oils. Considerableinterest has also been shownin its potential use in a ‘hydrogenfuel economy’ in which primary energysources not based on fossil fuels(e.g. nuclear, solar, or geothermal energy)are used to produce electricity,which is employed in electrolysingwater. The hydrogen formed isstored as liquid hydrogen or as metalhydrides. Chemically, hydrogen reactswith most elements. It was discoveredby Henry Cavendish in1766.

定義

ChEBI: An elemental molecule consisting of two hydrogens joined by a single bond.

一般的な説明

Hydrogen is a colorless, odorless gas. Hydrogen is easily ignited. Once ignited Hydrogen burns with a pale blue, almost invisible flame. The vapors are lighter than air. Hydrogen is flammable over a wide range of vapor/air concentrations. Hydrogen is not toxic but is a simple asphyxiate by the displacement of oxygen in the air. Under prolonged exposure to fire or intense heat the containers may rupture violently and rocket. Hydrogen is used to make other chemicals and in oxyHydrogen welding and cutting.

空気と水の反応

Highly flammable.

反応プロフィール

Finely divided platinum and some other metals will cause a mixture of Hydrogen and oxygen to explode at ordinary temperatures. If a jet of Hydrogen in air impinges on platinum black the metal surface gets hot enough to ignite the gases, [Mellor 1:325(1946-1947)]. Explosive reactions occur upon ignition of mixtures of nitrogen trifluoride with good reducing agents such as ammonia, Hydrogen, Hydrogen sulfide or methane. Mixtures of Hydrogen, carbon monoxide, or methane and oxygen difluoride are exploded when a spark is discharged, [Mellor 2, Supp. 1:192(1956)]. An explosion occurred upon heating 1'-pentol and 1''-pentol under Hydrogen pressure. Hydrogen appears that this acetylenic compound under certain conditions suddenly breaks down to form elemental carbon, Hydrogen, and carbon monoxide with the release of sufficient energy to develop pressures in excess of 1000 atmospheres, [AIChE Loss Prevention, p1, (1967)].

危険性

Highly flammable and explosive, dangerous when exposed to heat or flame, explosive limits in air 4–75% by volume.

危険性

Hydrogen gas is very explosive when mixed with oxygen gas and touched off by a spark or flame. Many hydrides of hydrogen are dangerous and can become explosive if not stored and handled correctly. Many organic and hydrocarbon compounds are essential for life to exist, but just as many are poisonous, carcinogenic, or toxic to living organisms.

健康ハザード

Hydrogen is practically nontoxic. In high concentrations this gas is a simple asphyxiant, and ultimate loss of consciousness may occur when oxygen

健康ハザード

Vapors may cause dizziness or asphyxiation without warning. Some may be irritating if inhaled at high concentrations. Contact with gas or liquefied gas may cause burns, severe injury and/or frostbite. Fire may produce irritating and/or toxic gases.

火災危険

EXTREMELY FLAMMABLE. Will be easily ignited by heat, sparks or flames. Will form explosive mixtures with air. Vapors from liquefied gas are initially heavier than air and spread along ground. CAUTION: Hydrogen (UN1049), Deuterium (UN1957), Hydrogen, refrigerated liquid (UN1966) and Methane (UN1971) are lighter than air and will rise. Hydrogen and Deuterium fires are difficult to detect since they burn with an invisible flame. Use an alternate method of detection (thermal camera, broom handle, etc.) Vapors may travel to source of ignition and flash back. Cylinders exposed to fire may vent and release flammable gas through pressure relief devices. Containers may explode when heated. Ruptured cylinders may rocket.

火災危険

Hydrogen is a highly flammable gas that burns with an almost invisible flame and low heat radiation. Hydrogen forms explosive mixtures with air from 4 to 75% by volume. These explosive mixtures of hydrogen with air (or oxygen) can be ignited by a number of finely divided metals (such as common hydrogenation catalysts). In the event of fire, shut off the flow of gas and extinguish with carbon dioxide, dry chemical, or halon extinguishers. Warming of liquid hydrogen contained in an

燃焼性と爆発性

Hydrogen is a highly flammable gas that burns with an almost invisible flame and low heat radiation. Hydrogen forms explosive mixtures with air from 4 to 75% by volume. These explosive mixtures of hydrogen with air (or oxygen) can be ignited by a number of finely divided metals (such as common hydrogenation catalysts). In the event of fire, shut off the flow of gas and extinguish with carbon dioxide, dry chemical, or halon extinguishers. Warming of liquid hydrogen contained in an enclosed vessel to above its critical temperature can cause bursting of that container.

农业用途

Hydrogen, a non-metallic element, is a colorless odorless, tasteless gas occurring in water combined with oxygen, and in all organic compounds (for example, hydrocarbons and carbohydrates). It is produced by electrolysis of water and is used in the Haber-Bosch process for producing ammonia - a major raw material for nitrogenous fertilizers.
Large quantities of hydrogen are utilized in catalytic hydrogenation of unsaturated vegetable oils to make solid fats and petroleum refining. Large quantities of hydrogen are also used as a propulsion fuel for rockets in conjunction with oxygen or fluorine. Being flammable, it is used with helium for filling balloons and airships.
Hydrogen is the lightest of all the elements holding position in Group 1 of the Periodic Table. It is abundant in the universe. There are three hydrogen isotopes namely hydrogen- 1, deuterium and tritium. The first two are naturally occurring stable isotopes and the third being radioactive, is made artificially.

貯蔵

hydrogen cylinders should be clamped or otherwise supported in place and used only in areas free of ignition sources and separate from oxidizers. Expansion of hydrogen released rapidly from a compressed cylinder will cause evolution of heat due to its negative Joule-Thompson coefficient.

純化方法

It is usually purified by passing through a suitable absorption train of tubes. Carbon dioxide is removed with KOH pellets, soda-lime or NaOH pellets. Oxygen is removed with a “De-oxo” unit or by passage over Cu heated to 450-500o and Cu on Kieselguhr at 250o. Passage over a mixture of MnO2 and CuO (Hopcalite) oxidises any CO to CO2 (which is removed as above). Hydrogen can be dried by passage through dried silica-alumina at -195o, through a dry-ice trap followed by a liquid-N2 trap packed with glass wool, through CaCl2 tubes, or through Mg(ClO4)2 or P2O5. Other purification steps include passage through a hot palladium thimble [Masson J Am Chem Soc 74 4731 1952], through an activated-charcoal trap at -195o, and through a non-absorbent cotton-wool filter or small glass spheres coated with a thin layer of silicone grease. Potentially VERY EXPLOSIVE in air.

不和合性

Hydrogen is a reducing agent and reacts explosively with strong oxidizers such as halogens (fluorine, chlorine, bromine, iodine) and interhalogen compounds.

廃棄物の処理

Excess hydrogen cylinders should be returned to the vendor. Excess hydrogen gas present over reaction mixtures should be carefully vented to the atmosphere under conditions of good ventilation after all ignition sources have been removed. For more information on disposal procedures, see Chapter 7 of this volume.

水素 上流と下流の製品情報

原材料

準備製品


水素 生産企業

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1333-74-0(水素)キーワード:


  • 1333-74-0
  • Industrial hydrogen
  • hydrogen,refrigeratedliquid(cryogenicliquid)
  • hydrogengas
  • Molecular hydrogen
  • molecularhydrogen
  • o-Hydrogen
  • p-Hydrogen
  • EXPLOSIMETRY STANDARD EX-3
  • HYDROGEN
  • PROTIUM
  • HYDROGE
  • GAS MIX HYDROGEN-PURE- HYDROGEN 1X14L
  • HYDROGEN, 99.99+%
  • HYDROGEN, PRESSURE TIN WITH 1 L
  • Dihydrogen
  • H2
  • hydrogen,compressed
  • hydrogen,highpurity
  • Liquid hydrogen
  • Compressed hydrogen
  • Hydrogen,pure (99.99%)
  • Hydrogen molecule
  • DEUTERIUM (D, 99.8%)
  • Hydrogen Messer(R) CANgas, 99.999%
  • diprotium
  • Wasserstoff
  • WASSERSTOFF 3,0 REINHEIT 99,9 P.
  • hydrogen, refrigerated liquid
  • 水素分子
  • H2ガス
  • 水素ガス
  • 二水素
  • 水素
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