Molybddntrioxid

Gefahreninformationscode (GHS)

• Bildanzeige (GHS)

  

• Alarmwort

  Warnung

• Gefahrenhinweise

  H319：Verursacht schwere Augenreizung.

  H335：Kann die Atemwege reizen.

  H351：Kann vermutlich Krebs verursachen.

• Sicherheit

  P201：Vor Gebrauch besondere Anweisungen einholen.

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

  P308+P313：BEI Exposition oder falls betroffen: Ärztlichen Rat einholen/ärztliche Hilfe hinzuziehen.

Molybdenum trioxide Chemische Eigenschaften,Einsatz,Produktion Methoden

• Beschreibung

  Molmasse 143.95 g/mol. Weißes Pulver, das sich beim Erhitzen gelb färbt und nach dem Erkalten wieder farblos wird. Beim Sublimieren erhält man glänzende, farblose, kristalline Flitter. F. 795 ℃, Kp. 1155 ℃. Löslichkeit in Wasser bei 28 ℃: 0.490 g MoO3; Kristallstruktur orthorhombisch (a = 3.92, b = 13.94, c = 3.66 A).

• R-Sätze Betriebsanweisung:

  R36/37:Reizt die Augen und die Atmungsorgane.
  R48/20/22:Gesundheitsschädlich: Gefahr ernster Gesundheitsschäden bei längerer Exposition durch Einatmen und durch Verschlucken.

• S-Sätze Betriebsanweisung:

  S22:Staub nicht einatmen.
  S23:Gas/Rauch/Dampf/Aerosol nicht einatmen(geeignete Bezeichnung(en) vom Hersteller anzugeben).
  S25:Berührung mit den Augen vermeiden.

• Beschreibung

  Molybdenum trioxide is an odorless, whitecrystalline powder that turns yellow when heated; Freezing/Melting point 5 795℃. Hazard Identification (based onNFPA-704 M Rating System): Health 2, Flammability 0,Reactivity 0. Slightly soluble in water.

• Chemische Eigenschaften

  Molybdenum trioxide is an odorless, white crystalline powder that turns yellow when heated.
  
  Molybdenum trioxide is perhaps the most important compound of molybdenum. Pure molybdenum trioxide is used in chemical and catalyst manufacture. The technical product is added to steel as an alloying agent. Molybdenum trioxide also serves as a catalyst in the petroleum industry and as a component of ceramics, enamels and pigments.

• Physikalische Eigenschaften

  Soft white powder; orthorhombic crystals; turns yellow on heating; density 4.69 g/cm³ at 21°C; melts at 795°C without decomposition to a dark yellow liquid; vapor pressure 20 torr at 851°C and 200 torr at 1,014°C; boils at 1,155°C; sparingly soluble in cold water (1.066 g/L at 18°C) and moderately soluble in hot water (20.55 g/L at 70°C); dissolves in acids and alkalies.

• Verwenden

  Molybdenum trioxide (MnO3) is a compound used to make enamels adhere to metals.

• Verwenden

  Chiefly as a reagent for chemical analysis.Used for trace metal analysis.

• Verwenden

  Molybdenum(VI) oxide is used in catalyst compositions to carry out desulfurization of petroleum feedstocks and to remove nitrogen-containing compounds from petroleum fractions. Other uses of this oxide include preparation of various molybdate salts and as reagents for chemical analyses.

• synthetische

  Molybdenum(VI) oxide is obtained by igniting molybdenum or its compounds in air:
  2Mo + 3O2 → 2MoO3
  2MoS2 + 7O2 → 2MoO3 + 4SO2
  MoS2 + 4O2 → MoO3 + SO2 + SO3
  Roasting the sulfide is carried out in a multiple-hearth roaster under controlled temperature and airflow. The product mixture is sublimed to obtain high purity oxide.
  Purified molybdenum(VI) oxide also is made by prolonged heating of ammonium molybdate in air:
  (NH4)2Mo2O7 → 2MoO3 + 2NH3 + H2O
  An alternative method involves repeatedly evaporating a mixture of ammonium molybdate and nitric acid. Ammonium nitrate so formed is separated from the product molybdenum(VI) oxide by extraction with water:
  (NH4)2Mo2O7 + 2HNO3 → 2MoO3 + 2NH4NO3 + H2O

• Definition

  ChEBI: Molybdenum trioxide is a molybdenum oxide.

• Allgemeine Beschreibung

  Colorless to white or yellow odorless solid. Sinks in water.

• Air & Water Reaktionen

  Insoluble in water.

• Reaktivität anzeigen

  Molybdenum trioxide reacts violently with chlorine trifluoride, lithium, potassium and sodium. Readily combines with acids and bases to form a series of polymeric compounds. Incompatible with interhalogens and metals. A violent detonation occurs when heated with molten magnesium.

• Hazard

  Toxic material.

• Health Hazard

  Compound is relatively nontoxic. Dust irritates eyes.

• Brandgefahr

  Flash point data for Molybdenum trioxide are not available, but Molybdenum trioxide is probably non-flammable.

• Flammability and Explosibility

  Non flammable

• reaction suitability

  reagent type: catalyst
  core: molybdenum

• Sicherheitsprofil

  Poison by ingestion, subcutaneous, and intraperitoneal routes. Human systemic effects by inhalation: pulmonary fibrosis and cough. Questionable carcinogen with experimental neoplastigenic data. A powerful irritant. Explodes on contact with molten magnesium. Violent reaction with interhalogens (e.g., bromine pentafluoride, chlorine trifluoride). Incandescent reaction with hot sodium, potassium, or lithium. When heated to decomposition it emits toxic fumes of Mo.

• mögliche Exposition

  Molybdenum trioxide is used in agriculture; manufacture of metallic molybdenum, ceramic glazes; enamels, pigments, and in analytical chemistry.

• 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

• Lager

  Color Code—Blue: Health Hazard/Poison: Storein a secure poison location. Prior to working with thischemical you should be trained on its proper handling andstorage. Molybdenum trioxide must be stored to avoid contact with strong acids (such as hydrochloric, sulfuric, andnitric); alkalis, sodium, potassium, and molten magnesiumsince violent reactions occur. Store in tightly closed containers in a cool, well-ventilated area.

• Versand/Shipping

  UN2811 Toxic solids, organic, n.o.s., Hazard Class: 6.1; Labels: 6.1-Poisonous materials, Technical Name Required.

• läuterung methode

  Crystallise it from water (1g/50mL) between 70o and 0o. The solubility in H2O is 0.1% at 18o, and 2% at 70o. It is a white powder which turns yellow reversibly on heating. It sublimes readily at 1155o/760mm. [Hein & Herzog Handbook of Preparative Inorganic Chemistry (Ed. Brauer) Academic Press Vol II p 1412 1965.]

• Inkompatibilitäten

  Explodes on contact with molten magnesium. Violent reaction with strong oxidizers, such as chlorine trifluoride; bromine pentafluoride. Not compatible with strong acids; active metals (sodium, potassium, lithium).

• Filter für giftige stoffe

  The Initial Threshold Screening Level (ITSL) for Molybdenum Trioxide is 5 μg/m3 based on an 8 hour averaging time.

Molybdenum trioxide Upstream-Materialien And Downstream Produkte

Molybddntrioxid Anbieter Lieferant Produzent Hersteller Vertrieb Händler.

Global(563)Suppliers

1313-27-5, Molybdenum trioxide Verwandte Suche: