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ランタン

ランタン 化学構造式
7439-91-0
CAS番号.
7439-91-0
化学名:
ランタン
别名:
ランタン;ランタン,粉末;ランタン,塊状;ランタン,塊;ランタン(棒状);ランタン,削り状;ランタン chips (99.6% REO);ランタン ingot (99.9% REO);ランタン powder (99.9% REO);ランタン rod, 12.7mm (0.5in) dia, 99.9% (metals basis excluding Ta);ランタン foil (99.9% REO)
英語化学名:
LANTHANUM
英語别名:
57La;Lanthan;Lantano;LA000210;LA000200;LA007910;LA000215;LA000240;Lanthane;LANTHANUM
CBNumber:
CB6472159
化学式:
La
分子量:
138.91
MOL File:
7439-91-0.mol

ランタン 物理性質

融点 :
920 °C(lit.)
沸点 :
3464 °C(lit.)
比重(密度) :
6.19 g/mL at 25 °C(lit.)
外見 :
slugs
色:
Silver-white
比重:
6.19
電気抵抗率 (resistivity):
54 μΩ-cm
水溶解度 :
slowly decomposes in H2O; readily attacked by mineral acids [MER06]
Sensitive :
Air & Moisture Sensitive
Merck :
13,5379
安定性::
Stable.
CAS データベース:
7439-91-0(CAS DataBase Reference)
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,T
Rフレーズ  11-34-23/24/25-14/15
Sフレーズ  26-27-36/37/39-45-33-16-23-43-Neverusewater.
RIDADR  UN 3264 8/PG 3
WGK Germany  3
TSCA  Yes
国連危険物分類  4.1
容器等級  III
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
H228 可燃性固体 可燃性固体 1
2
危険
警告
P210, P240,P241, P280, P370+P378
H260 水に触れると自然発火するおそれのある可燃性 /引火性ガスを発生 水反応可燃性化学品 1 危険 P223, P231+P232, P280, P335+ P334,P370+P378, P402+P404, P501
H261 水に触れると可燃性/引火性ガスを発生 水反応可燃性化学品 2
3
危険
警告
P231+P232, P280, P370+P378,P402+P404, P501
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。
P223 激しい反応と火災の発生の危険があるため、水と接 触させないこと。
P231+P232 湿気を遮断し、不活性ガス下で取り扱うこと。
P240 容器を接地すること/アースをとること。
P280 保護手袋/保護衣/保護眼鏡/保護面を着用するこ と。
P335+P334 固着していない粒子を皮膚から払いのけ、冷たい水に浸 すこと/湿った包帯で覆うこと。
P370+P378 火災の場合:消火に...を使用すること。
P402+P404 乾燥した場所または密閉容器に保管するこ と。
P422 内容物を...中で保管すること。

ランタン 価格 もっと(46)

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
富士フイルム和光純薬株式会社(wako) W01ALF040293
Lanthanum rod, 12.7mm (0.5in) dia, 99.9% (metals basis excluding Ta)
7439-91-0 10mm ¥33900 2018-12-26 購入
富士フイルム和光純薬株式会社(wako) W01ALF040293
Lanthanum rod, 12.7mm (0.5in) dia, 99.9% (metals basis excluding Ta)
7439-91-0 25mm ¥55000 2018-12-26 購入
Sigma-Aldrich Japan 263109 ランタン powder, ?40?mesh, under oil, 99.9% trace rare earth metals basis
Lanthanum powder, ?40?mesh, under oil, 99.9% trace rare earth metals basis
7439-91-0 25g ¥46200 2018-12-25 購入
Sigma-Aldrich Japan 261130 ランタン ingot (under oil), 99.9% trace rare earth metals basis
Lanthanum ingot (under oil), 99.9% trace rare earth metals basis
7439-91-0 25g ¥15000 2018-12-25 購入
林純薬工業株式会社 MT038025 ランタン,塊 99.9%
Lanthanum 99.9%
7439-91-0 25g ¥20000 2018-12-15 購入

ランタン 化学特性,用途語,生産方法

外観

銀灰色の削り状

溶解性

水には徐々に、酸水溶液には速やかにH2を発生して溶け、La(3+)となる。塩酸に溶ける。

化学的特性

solid

物理的性質

Lanthanum is a soft silvery-white metal that, when cut with a knife, forms an oxide withthe air (tarnishes) on the exposed area. It is the most reactive of the elements in the series. Itreacts slightly with cold water but rapidly with hot water, producing hydrogen gas (H2) andlanthanum oxide (La2O3). It directly interacts with several other elements, including nitrogen,boron, the halogens, carbon, sulfur, and phosphorus.
Its melting point is 918°C, its boiling point is 3,464°C, and its density is 6.15 g/cm3.

同位体

There are 49 isotopes of lanthanum. One, La-139, is stable and makes up99.910% of the known amount found on Earth. Another isotope has such a long halflifethat is considered stable: with a half-life of 1.05×10+11 years, La-138 makes up just0.090% of the known abundance on Earth. All the other isotopes are radioactive andhave half-lives ranging from 150 nanoseconds to several thousand years.

名前の由来

From the Greek word lanthanein, meaning “to be hidden.”

天然物の起源

The main ore in which lanthanum is found is monazite sands, and it is also found in themineral bastnasite. Monazite sands contain all of the rare-earth elements as well as some elementsthat are not rare-earths. Its ores are found in South Africa, Australia, Brazil, and Indiaand in California, Florida, and the Carolinas in the United States.
The prices of lanthanide elements are somewhat reasonable and are less than gold per kilogram.(Gold is about $1,800 per kg.) Cesium (Ce), which is relatively common, is often alloyedwith La, Nd, and Pr and iron to form misch metal. This alloy has several uses based on its uniqueability to spark when scratched. The most common use is as flints for cigarette lighters.
Lanthanum is the fourth most abundant of the rare-earths found on the Earth. Its abundanceis 18 ppm of the Earth’s crust, making it the 29th most abundant element on Earth. Itsabundance is about equal to the abundance of zinc, lead, and nickel, so it is not really rare.Because the chemical and physical properties of the elements of the lanthanide series are sosimilar, they are quite difficult to separate. Therefore, some of them are often used together asan alloy or in compounds.

特性

Lanthanide, as a pure metal, is difficult to separate from its ores, and it is often mixed withother elements of the series. It is mostly obtained through an ion-exchange process from the sandsof the mineral monazite, which can contain as much as 25% lanthanum as well as the oxides ofseveral other elements of the series. The metal is malleable and ductile and can be formed intomany shapes. Lanthanum is considered the most basic (alkaline) of the rare-earth elements.

来歴

Mosander in 1839 extracted a new earth lanthana, from impure cerium nitrate, and recognized the new element. Lanthanum is found in rare-earth minerals such as cerite, monazite, allanite, and bastnasite. Monazite and bastnasite are principal ores in which lanthanum occursin percentages up to 25 and 38%, respectively. Misch metal, used in making lighter flints, contains about 25% lanthanum. Lanthanum was isolated in relatively pure form in 1923. Ion-exchange and solvent extraction techniques have led to much easier isolation of the so-called “rare-earth” elements. The availability of lanthanum and other rare earths has improved greatly in recent years. The metal can be produced by reducing the anhydrous fluoride with calcium. Lanthanum is silvery white, malleable, ductile, and soft enough to be cut with a knife. It is one of the most reactive of the rare-earth metals. It oxidizes rapidly when exposed to air. Cold water attacks lanthanum slowly, and hot water attacks it much more rapidly. The metal reacts directly with elemental carbon, nitrogen, boron, selenium, silicon, phosphorus, sulfur, and with halogens. At 310°C, lanthanum changes from a hexagonal to a face-centered cubic structure, and at 865°C it again transforms into a body-centered cubic structure. Natural lanthanum is a mixture of two isotopes, one of which is stable and one of which is radioactive with a very long halflife. Thirty other radioactive isotopes are recognized. Rareearth compounds containing lanthanum are extensively used in carbon lighting applications, especially by the motion picture industry for studio lighting and projection. This application consumes about 25% of the rare-earth compounds produced. La2O3 improves the alkali resistance of glass, and is used in making special optical glasses. Small amounts of lanthanum, as an additive, can be used to produce nodular cast iron. There is current interest in hydrogen sponge alloys containing lanthanum. These alloys take up to 400 times their own volume of hydrogen gas, and the process is reversible. Heat energy is released every time they do so; therefore these alloys have possibilities in energy conservation systems. Lanthanum and its compounds have a low to moderate acute toxicity rating; therefore, care should be taken in handling them. The metal costs about $2/g (99.9%).

使用

Lanthanum is the first element in the rare earth or Lanthanide series. It is the model for all the other trivalent rare earths. After Cerium, it is the second most abundant of the rare earths.
Lanthanum-rich Lanthanide compounds have been used extensively for cracking reactions in FCC catalysts, especially to manufacture high-octane gasoline from heavy crude oil. 
Lanthanum-Rich Rare Earth metals play the important roles in hydrogen storage batteries.
It is utilized in green phosphors based on the phosphate (La0.4Ce0.45Tb0.15)PO4;in laser crystals based on the Yttrium-Lanthanum-Fluoride (YLF) composition.
Lanthanum Metal is the very important raw materials in producing Hydrogen Storage Alloys for NiMH batteries, and is also used to produce other pure Rare Earth metals and specialty alloys. Small amounts of Lanthanum added to Steel improves its malleability, resistance to impact, and ductility; Small amounts of Lanthanum are present in many pool products to remove the Phosphates that feed algae. Lanthanum Metal can be further processed to various shapes of ingots, pieces, wires, foils, slabs, rods, discs and powder.

使用

Carl Auer Baron van Welsbach (1858–1929) of Austria developed misch metal as a methodof igniting a gas flame. In 1903 he patented an alloy of 70% Ce and 30% Fe that gave offsparks when scratched by steel. Baron van Welsbach is also the inventor of the gas mantle.Today, China manufactures most of the misch metal used in the world. The alloys that Chinauses consist of Ce, La, and Nd. They use whatever mixture of these elements are found intheir ores, and thus there is no need to refine them. Lanthanum is used to make electrodes forhigh-intensity, carbon-arc lights that are used in motion picture studios and searchlights. Italso used in the refining of high-grade europium metal and the creation of glass with a highrefractive index as well as for quality lenses in cameras and scientific instruments. It is also usedin the manufacture of strong permanent magnets.
Lanthanum is used for electronic instruments, as a rocket fuel, as a reducing agent, andin automobile catalytic converters.

定義

A soft ductile malleable silvery metallic element that is the first member of the lanthanoid series. It is found associated with other lanthanoids in many minerals, including monazite and bastnaesite. Lanthanum is used in several alloys (especially for lighter flints), as a catalyst, and in making optical glass. Symbol: La; m.p. 921°C; b.p. 3457°C; r.d. 6.145 (25°C); p.n. 57; r.a.m. 138.9055.

定義

lanthanum: Symbol La. A silverymetallic element belonging to group3 (formerly IIIA) of the periodic tableand often considered to be one of thelanthanoids; a.n. 57; r.a.m. 138.91;r.d. 6.146 (20°C); m.p. 921°C; b.p.3457°C. Its principal ore is bastnasite,from which it is separated by an ionexchangeprocess. There are two naturalisotopes, lanthanum–139 (stable)and lanthanum–138 (half-life1010–1015 years). The metal, being pyrophoric,is used in alloys for lighterflints and the oxide is used in someoptical glasses. The largest use of lanthanum,however, is as a catalyst incracking crude oil. Its chemistry resemblesthat of the lanthanoids. Theelement was discovered by CarlMosander (1797–1858) in 1839.

危険性

In powder form, lanthanum will ignite spontaneously. If ingested, it can cause liver damageand prevent blood from clotting. Many of its compounds are toxic.

工業用途

A chemical element, lanthanum, symbol La, thesecond most abundant element in the rare earthgroup, is a metal. The naturally occurring elementis made up of the isotopes and is one ofthe radioactive products of the fission of uranium,thorium, or plutonium. Lanthanum is themost basic of the rare earths and can be separatedrapidly from other members of the rareearth series by fractional crystallization. Considerablequantities of it are separated commercially,because it is an important ingredient inglass manufacture. Lanthanum imparts a highrefractive index to the glass and is used in themanufacture of expensive lenses. The metal isreadily attacked in air and is rapidly convertedto a white powder.
Lanthanum becomes a superconductorbelow about –267°C in both the hexagonal andface-centered crystal forms.

純化方法

It is a shiny metal that slowly tarnishes in air due to oxidation. It slowly decomposes by H2O in the cold and more rapidly on heating to form the hydroxide. The metal is cleaned by scraping off the tarnished areas until the shiny metal is revealed and stored under oil or paraffin. It burns in air at 450o. It exists in three forms: -form, -form and -form with transition temperatures of 310o and 864o, respectively. [Spedding et al. Ind Eng Chem 44 553 1952.]

ランタン 上流と下流の製品情報

原材料

準備製品


ランタン 生産企業

Global( 91)Suppliers
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Mainchem Co., Ltd.
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+86-0592-6210733 sales@mainchem.com CHINA 32651 55
J & K SCIENTIFIC LTD. 400-666-7788 +86-10-82848833
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Alfa Aesar 400-610-6006; 021-67582000
021-67582001/03/05 saleschina@alfa-asia.com China 30291 84
Energy Chemical 021-58432009 / 400-005-6266
021-58436166-800 info@energy-chemical.com China 44187 61
JinYan Chemicals(ShangHai) Co.,Ltd. 13817811078,021-50426030
86-021-50426522,50426273 sales@jingyan-chemical.com China 10073 60
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Shanghai Hanhong Scientific Co.,Ltd. 021-54306202,021-54308259
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Chengdu XiYa Chemical Technology Co., Ltd. 4008-626-111
028-84752058 sale@xiyashiji.com China 9726 57
BEST-REAGENT 400-1166-196
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7439-91-0(ランタン)キーワード:


  • 7439-91-0
  • LANTHANUM ICP STANDARD TRACEABLE TO SRM
  • LanthanuM Metal powder
  • LA000240
  • LA000215
  • LA007910
  • LA000200
  • LA000210
  • Lanthanum rod, 100mm, diameter 6.35mm, cast, 99%
  • COPPER 1,000PPM FOR ICP
  • HYDROCHLORIC ACID 1N REAGENT GRADE
  • ZINC SULFATE HEPTAHYDRATE USP GRADE
  • Lanthanum rod, 6.35mm dia., 99.9% trace rare earth metals basis
  • Lanthanum pieces, 99.9% trace rare earth metals basis
  • Lanthanum foil25x25mm
  • Lanthanum powder, -40 mesh, 99.9% trace rare earth metals basis
  • Lanthanum foil50x50mm
  • Lanthanum rod, 12.7mm dia., 99.9% trace metals basis excluding Ta
  • Lanthanum foil, 1.0mm (0.04 in.) thick
  • Lanthanum, Rare Earth Oxides Content
  • LANTHANUM, POWDER, -40 MESH, 99.9%
  • Lanthanum, pieces, 99.9% metals basis
  • LANTHANUM, INGOT, 99.9%
  • LANTHANUM UNDER OIL
  • LanthanumFoil,99.9%
  • LANTHANUM 99.9%, PELLETS PACKED UNDER OIL
  • Lanthanumchips(99.6%REO)
  • Lanthanumfoil(99.9%REO)
  • Lanthanumingot(99.9%REO)
  • Lanthanumpowder(99.9%REO)
  • Lanthan
  • ランタン
  • ランタン,粉末
  • ランタン,塊状
  • ランタン,塊
  • ランタン(棒状)
  • ランタン,削り状
  • ランタン chips (99.6% REO)
  • ランタン ingot (99.9% REO)
  • ランタン powder (99.9% REO)
  • ランタン rod, 12.7mm (0.5in) dia, 99.9% (metals basis excluding Ta)
  • ランタン foil (99.9% REO)
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