Rhodium

Gefahreninformationscode (GHS)

• Bildanzeige (GHS)

  

• Alarmwort

  Achtung

• Gefahrenhinweise

  H228：Entzündbarer Feststoff.

  H315：Verursacht Hautreizungen.

  H319：Verursacht schwere Augenreizung.

  H332：Gesundheitsschädlich bei Einatmen.

  H335：Kann die Atemwege reizen.

  H373：Kann die Organe schädigen bei längerer oder wiederholter Exposition.

  H413：Kann für Wasserorganismen schädlich sein, mit langfristiger Wirkung.

• Sicherheit

  P210：Von Hitze, heißen Oberflächen, Funken, offenen Flammen und anderen Zündquellenarten fernhalten. Nicht rauchen.

  P240：Behälter und zu befüllende Anlage erden.

  P241：Explosionsgeschützte [elektrische/Lüftungs-/ Beleuchtungs-/...] Geräte verwenden.

  P260：Dampf/Aerosol/Nebel nicht einatmen.

  P261：Einatmen von Staub vermeiden.

  P280：Schutzhandschuhe/Schutzkleidung/Augenschutz tragen.

  P304+P340：BEI EINATMEN: Die Person an die frische Luft bringen und für ungehinderte Atmung sorgen.

  P305+P351+P338：BEI KONTAKT MIT DEN AUGEN: Einige Minuten lang behutsam mit Wasser spülen. Eventuell vorhandene Kontaktlinsen nach Möglichkeit entfernen. Weiter spülen.

  P314：Bei Unwohlsein ärztlichen Rat einholen / ärztliche Hilfe hinzuziehen.

  P403+P233：An einem gut belüfteten Ort aufbewahren. Behälter dicht verschlossen halten.

  P405：Unter Verschluss aufbewahren.

Rhodium Chemische Eigenschaften,Einsatz,Produktion Methoden

• ERSCHEINUNGSBILD

  GRAUES BIS SCHWARZES PULVER

• CHEMISCHE GEFAHREN

  Reagiert sehr heftig mit Halogenen unter Feuergefahr. Rhodium kann chemische Reaktionen bei Kontakt mit vielen organischen und anorganischen Substanzen katalysieren. Feuer- und Explosionsgefahr.

• ARBEITSPLATZGRENZWERTE

  TLV: 1.0 mg/m?(als TWA); Krebskategorie A4 (nicht klassifizierbar als krebserzeugend für den Menschen); (ACGIH 2005).
  MAK: Krebserzeugend Kategorie 3B; (DFG 2005).
  

• INHALATIONSGEFAHREN

  Eine gesundheitsschädliche Partikelkonzentration in der Luft kann beim Dispergieren schnell erreicht werden.

• WIRKUNGEN BEI KURZZEITEXPOSITION

  WIRKUNGEN BEI KURZZEITEXPOSITION:
  Reizt möglicherweise mechanisch.

• LECKAGE

  Verschüttetes Material in abgedeckten Behältern sammeln; falls erforderlich durch Anfeuchten Staubentwicklung verhindern. Reste sorgfältig sammeln. An sicheren Ort bringen. Persönliche Schutzausrüstung: Atemschutzgerät, P2-Filter für schädliche Partikel.

• R-Sätze Betriebsanweisung:

  R36/38:Reizt die Augen und die Haut.
  R11:Leichtentzündlich.
  R36/37/38:Reizt die Augen, die Atmungsorgane und die Haut.
  R36:Reizt die Augen.
  R34:Verursacht Verätzungen.
  R23:Giftig beim Einatmen.

• S-Sätze Betriebsanweisung:

  S26:Bei Berührung mit den Augen sofort gründlich mit Wasser abspülen und Arzt konsultieren.
  S24/25:Berührung mit den Augen und der Haut vermeiden.
  S16:Von Zündquellen fernhalten - Nicht rauchen.
  S22:Staub nicht einatmen.
  S36:DE: Bei der Arbeit geeignete Schutzkleidung tragen.
  S17:Von brennbaren Stoffen fernhalten.
  S45:Bei Unfall oder Unwohlsein sofort Arzt zuziehen (wenn möglich, dieses Etikett vorzeigen).
  S36/37/39:Bei der Arbeit geeignete Schutzkleidung,Schutzhandschuhe und Schutzbrille/Gesichtsschutz tragen.

• Beschreibung

  Rhodium is one of the platinum group elements, and is found at very low concentrations in the Earths crust. Rhodium was discovered by William Hyde Wollaston (England) in 1804. The origin of the name comes from the Greek word rhodon, meaning rose. The plated solid is very corrosion resistant and exceptionally hard. While inert in air and acids, it can produce a violent reaction to chlorine, bromine pentafluoride, bromine trifluoride, and fluorine monoxide.

• Chemische Eigenschaften

  Rhodium, together with platinum, palladium, iridium, ruthenium, and osmium, is one of the platinum-group metals in Group VIII of the Periodic Table. Rhodium metal is a white, hard, ductile, malleable solid with a bluish-gray luster. soluble in ether, alcohol, and water. The alloys of rhodium can also be used in high temperature conditions (i.e., thermocouples and crucibles). It also can be used in electroplating glass products due to its reflective properties.
  

• Physikalische Eigenschaften

  Rhodium is a hard shiny-white metal that resists corrosion from oxygen, moisture, andacids at room temperatures. As a member of group 8 (VIII), ₄₅Rh shares many chemical andphysical properties with cobalt (₂₇Co) just above it and iridium (₇₇Ir) below it in the verticalgroup. Therefore, it is considered one of the elements that are transitory between metals andnonmetals. It is rare and only found in combination with platinum ores.
  Rhodium’s melting point is 1,966°C, its boiling point is 3,727°C, and its density is 12.41g/cm³.

• Isotopes

  There are 52 isotopes of rhodium, ranging from Rh-89 to Rh-122. All are producedartificially with relatively short half-lives except one stable isotope, Rh-103, whichconstitutes 100% of the element’s existence in the Earth’s crust.

• Origin of Name

  Named after the Greek word rhodon, which means “rose,” because of the reddish color of its salt compounds.

• Occurrence

  Rhodium is rare, but not as rare as ruthenium. It makes up only 1 part in 20 million of theelements found in the Earth’s crust. Even so, it is considered the 79th most abundant elementand is found mixed with platinum ore, and to a lesser extent, it is found with copper andnickel ores. It is found in Siberia, South Africa, and Ontario, Canada.
  Rhodium is recovered from platinum and other ores by refining and purification processesthat start by dissolving the other platinum group metals and related impurities with strongacids that do not affect the rhodium itself. Any remaining platinum group elements areremoved by oxidation and bathing the mixture in chlorine and ammonia.
  Rhodium is usually produced as a powder and can be formed by either casting or powdermetallurgy.

• History

  Wollaston discovered rhodium in 1803-4 in crude platinum ore he presumably obtained from South America. Rhodium occurs native with other platinum metals in river sands of the Urals and in North and South America. It is also found with other platinum metals in the copper-nickel sulfide ores of the Sudbury, Ontario region. Although the quantity occurring here is very small, the large tonnages of nickel processed make the recovery commercially feasible. The annual world production of rhodium in 1999 was only about 9000 kg. The metal is silvery white and at red heat slowly changes in air to the sesquioxide. At higher temperatures it converts back to the element. Rhodium has a higher melting point and lower density than platinum. Its major use is as an alloying agent to harden platinum and palladium. Such alloys are used for furnace windings, thermocouple elements, bushings for glass fiber production, electrodes for aircraft spark plugs, and laboratory crucibles. It is useful as an electrical contact material as it has a low electrical resistance, a low and stable contact resistance, and is highly resistant to corrosion. Plated rhodium, produced by electroplating or evaporation, is exceptionally hard and is used for optical instruments. It has a high reflectance and is hard and durable. Rhodium is also used for jewelry, for decoration, and as a catalyst. Fifty-two and isomers are now known. Rhodium metal (powder) costs about $180/g (99.9%).isotopes

• Charakteristisch

  Rhodium is one of the six platinum transition elements that include Ru, Rh, Pd, Os, Ir, andPt. Of these metals, rhodium has the highest electrical and thermal conductivity. Although arelatively scarce metal, rhodium makes an excellent electroplated surface that is hard, wearswell, and is permanently bright—ideal for plating the reflectors in automobile headlights.

• Verwenden

  Rhodium is commercially used as an alloy metal with other metals to form durable hightemperatureelectrical equipment, thermocouples, electrical contacts and switches, and laboratorycrucibles.
  Because of its high reflectivity, it is used to electroplate jewelry, silverware, optical instruments,mirrors, and reflectors in lighting devices.
  When rhodium is combined with platinum and palladium, the elements together form theinternal metals of automobile catalytic converters, which convert hot unburned hydrocarbonexhaust gases to less harmful CO₂ and H₂O. Similar alloys are used to manufacture hightemperatureproducts such as electric coils for metal refining furnaces and high-temperaturespark plugs.

• Verwenden

  As an alloy with platinum; as a corrosion-resistant electroplate for protecting silverware from tarnishing; for making high-reflectivity mirrors for cinema projectors, searchlights. Spongy or black rhodium is used as a catalyst in various organic hydrogenation and oxidation reactions.

• Verwenden

  Rhodium is a transition metal catalyst used in a multitude of inorganic synthesis.

• Vorbereitung Methode

  Pure rhodium is prepared by the reduction of its ammonium salt (dichloropentaaminorhodium).

• Definition

  A rare silvery hard transition metal. It is difficult to work and highly resistant to corrosion. Rhodium occurs native but most is obtained from copper and nickel ores. It is used in protective finishes, alloys, and as a catalyst. Symbol: Rh; m.p. 1966°C; b.p. 3730°C; r.d. 12.41 (20°C); p.n. 45; r.a.m. 102.90550.

• Definition

  rhodium: Symbol Rh. A silvery whitemetallic transition element;a.n. 45; r.a.m. 102.9; r.d. 12.4; m.p.1966°C; b.p. 3727°C. It occurs withplatinum and is used in certain platinumalloys (e.g. for thermocouples)and in plating jewellery and opticalreflectors. Chemically, it is not attackedby acids (dissolves only slowlyin aqua regia) and reacts with nonmetals(e.g. oxygen and chlorine) atred heat. Its main oxidation state is+3 although it also forms complexesin the +4 state. The element was discoveredin 1803 by William Wollaston(1766–1828).

• Definition

  Metallic element having atomic number 45, group VIII of the periodic table, aw 102.9055, no isotopes, valence = 3.

• Allgemeine Beschreibung

  This product has been enhanced for energy efficiency.

• Hazard

  Flammable in powder form. Upper respira- tory tract irritant. Questionable carcinogen.

• Hazard

  The powder and dust of rhodium metal are flammable in air. Some of the compounds maycause skin irritations. It is best to use approved laboratory procedures when handling any ofthe six elements in the platinum family of metals.

• Health Hazard

  There are no data demonstrating acute or chronic rhodium-related diseases; irritation and sensitization have occasionally been reported in humans from exposure to the salts of rhodium. Solutions of insoluble salts splashed in the eye may cause mild irritation.

• Flammability and Explosibility

  Not classified

• Industrielle Verwendung

  Metallic rhodium is the whitest of the platinum metals and does not tarnish under atmospheric conditions. It is insoluble in most acids, including aqua regia, but is attacked by chlorine at elevated temperatures and by hot fuming sulfuric acid. Liquid rhodium dissolves oxygen, and ingots are made by argon-arc melting. At temperatures above 1200 C, rhodium reacts with oxygen to form rhodium oxide, Rh2O3. Rhodium is used to make the nibs of writing pens, to make resistance windings in high-temperature furnaces, for high-temperature thermocouples, as a catalyst, and for laboratory dishes. It is the hardest of the platinum-group metals; the annealed metal has a Brinell hardness of 135. Rhodium is also valued for electroplating jewelry, electric contacts, hospital and surgical instruments, and especially reflectors.
  The most important alloys of rhodium are rhodium platinum. They form solid solutions in any proportion, but alloys of more than 40% rhodium are rare. Rhodium is not a potent hardener of platinum but increases its high-temperature strength. It is easily workable and does not tarnish or oxidize at high temperatures. These alloys are used for thermocouples and in the glass industry.

• Sicherheitsprofil

  Handle carefully. It may be a sensitizer but not to the same extent as platinum. Most rholum compounds have only moderate toxicity by ingestion. Flammable when exposed to heat or flame. Violent reaction with chlorine, bromine pentafluoride, bromine trifluoride, and OF2. A catalytic metal

• mögliche Exposition

  Rhodium has few applications by itself, as in rhodium plating of white gold jewelry or plat- ing of electrical parts, such as commutator slip rings, but, mainly, rhodium is used as a component of platinum alloys. Rhodium-containing catalysts have been proposed for use in automotive catalytic converters for exhaust gas cleanup.

• Erste Hilfe

  If this chemical gets into the eyes, remove anycontact lenses at once and irrigate immediately for at least15 min, occasionally lifting upper and lower lids. Seek medical attention immediately. If this chemical contacts theskin, remove contaminated clothing and wash immediatelywith soap and water. Seek medical attention immediately. Ifthis chemical has been inhaled, remove from exposure,begin rescue breathing (using universal precautions, including resuscitation mask) if breathing has stopped and CPR ifheart action has stopped. Transfer promptly to a medicalfacility. When this chemical has been swallowed, get medical attention. Give large quantities of water and inducevomiting. Do not make an unconscious person vomit. Ifmetal fume fever develops, it may last less than 36 h.Note to physician: In case of fume inhalation, treat for pulmonary edema. Give prednisone or other corticosteroidorally to reduce tissue response to fume. Positive-pressureventilation may be necessary. Treat metal fume fever withbed rest, analgesics, and antipyretics.

• Carcinogenicity

  Chick embryos exposed to rhodium on the eighth day of incubation were stunted; mild reduction of limb size and feather growth inhibition were also observed. A number of rhodium compounds have tested positive in bacterial assays for genetic altering capability.

• Environmental Fate

  The most common route by which rhodium enters the environment is as a component of automobile exhaust resulting from use of catalytic converters. Rhodium is insoluble in water and all acids, with the exception that very finely separated material may be dissolved in concentrated sulfuric acid and aqua regia.
  Being largely inert, rhodium can undergo long-range transport, and particulate phase matter generally leaves the atmosphere by wet or dry deposition. In an aqueous environment, rhodium can form complexes with halide and nitrogen donor ligands, which may be water soluble, but reactions can be dictated by pH, redox potential, and what material is available for creating ligands. Reactions in soil can depend on these same factors, as well as chloride concentrations, and rhodium is seen to be mobile only in highly acidic soils.
  Rhodium has been seen to bioaccumulate in both fresh and salt water species, and has the potential to biomagnify.

• Lager

  Color Code—Red (powder): FlammabilityHazard: Store in a flammable materials storage area. Priorto working with this material you should be trained on itsproper handling and storage. Store in tightly closed containers in a cool, well-ventilated area away from strong oxidizers and sources of ignition. Where possible, automaticallytransfer material from drums or other storage containers toprocess containers. Sources of ignition, such as smokingand open flames, are prohibited where this chemical is handled, used, or stored. Metal containers involving the transferof this chemical should be grounded and bonded. Whereverthis chemical is used, handled, manufactured, or stored, useexplosion-proof electrical equipment and fittings.

• Versand/Shipping

  Flammable powder, Hazard Class: 4.1; Labels: 4.1-Flammable solid.

• Toxicity evaluation

  Enzymes that have essential sulfhydryl groups in or near the activation sites are completely inhibited. It is thought that rhodium compounds bond to DNA, RNA, or the corresponding purines and inhibit their synthesis.

• Inkompatibilitäten

  Flammable as a dust, fume, or powder may form explosive mixture with air. Incompatible with strong oxidizers (chlorates, nitrates, peroxides, permanga- nates, perchlorates, chlorine, bromine, fluorine, etc.); con- tact may cause fires or explosions. Keep away from alkaline materials, strong bases, strong acids, oxoacids, epoxides, bromine pentafluoride, and bromine trifluoride; chlorine trifluoride; oxygen difluoride.

• Waste disposal

  Recovery in view of the high economic value. Recovery techniques for recycling of rhodium in plating wastes and spent catalysts have been described in the literature.

Rhodium Upstream-Materialien And Downstream Produkte

Rhodium Anbieter Lieferant Produzent Hersteller Vertrieb Händler.

Global(345)Suppliers

7440-16-6, Rhodium Verwandte Suche: