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Diboran (6)

Diborane Struktur
19287-45-7
CAS-Nr.
19287-45-7
Bezeichnung:
Diboran (6)
Englisch Name:
Diborane
Synonyma:
B2H6;Diboran;borone;Boron hydride (B2H6);borine;dlborane;DIBORANE;Boroethane;Chebi:33590;Diborane(6)
CBNumber:
CB6306298
Summenformel:
B2H6
Molgewicht:
27.67
MOL-Datei:
19287-45-7.mol

Diboran (6) Eigenschaften

Schmelzpunkt:
-165°C
Siedepunkt:
-93°C
Dichte
0.477
Flammpunkt:
-90°C
L?slichkeit
reacts with H2O
Aggregatzustand
colorless gas
Farbe
colorless gas; flammable
Geruch (Odor)
Repulsive odor detectable at 1.8 to 3.5 ppm
Wasserl?slichkeit
Decomposes
Merck 
13,3039
Expositionsgrenzwerte
TLV-TWA 0.11 mg/m3 (0.1 ppm) (ACGIH and OSHA); IDLH 40 ppm (NIOSH).
NIST chemische Informationen
Diborane(6)(19287-45-7)
EPA chemische Informationen
Diborane (19287-45-7)
Sicherheit
  • Risiko- und Sicherheitserkl?rung
  • Gefahreninformationscode (GHS)
Kennzeichnung gef?hrlicher F+;T,T,F+,T+
R-S?tze: 12-23/24/25-36/37/38-26
S-S?tze: 9-16-36/37/39-45-36/37-28
RIDADR  UN 1911/1953
OEB D
OEL TWA: 0.1 ppm (0.1 mg/m3)
Selbstentzündungstemperatur 38 to 52 °C
DOT Classification 2.3, Hazard Zone A (Gas poisonous by inhalation)
HazardClass  2.3
Giftige Stoffe Daten 19287-45-7(Hazardous Substances Data)
Toxizit?t LC50 inhal (rat) 50 ppm (4 h)
PEL (OSHA) 0.1 ppm
TLV-TWA (ACGIH) 0.1 ppm
IDLA 15 ppm
Bildanzeige (GHS) GHS hazard pictogramsGHS hazard pictogramsGHS hazard pictograms
Alarmwort Achtung
Gefahrenhinweise
Code Gefahrenhinweise Gefahrenklasse Abteilung Alarmwort Symbol P-Code
H220 Extrem entzündbares Gas. Entzündbare Gase Kategorie 1 Achtung GHS hazard pictogramssrc="/GHS02.jpg" width="20" height="20" /> P210, P377, P381, P403
H280 Enth?lt Gas unter Druck; kann bei Erw?rmung explodieren. Gase unter Druck verflüssigtes Gas Warnung GHS hazard pictogramssrc="/GHS04.jpg" width="20" height="20" /> P410+P403
H330 Lebensgefahr bei Einatmen. Akute Toxizit?t inhalativ Kategorie 1 Achtung GHS hazard pictogramssrc="/GHS06.jpg" width="20" height="20" /> P260, P271, P284, P304+P340, P310,P320, P403+P233, P405, P501
Sicherheit
P210 Von Hitze, hei?en Oberfl?chen, Funken, offenen Flammen und anderen Zündquellenarten fernhalten. Nicht rauchen.
P260 Dampf/Aerosol/Nebel nicht einatmen.
P271 Nur im Freien oder in gut belüfteten R?umen verwenden.
P284 Atemschutz tragen.
P304+P340 BEI EINATMEN: Die Person an die frische Luft bringen und für ungehinderte Atmung sorgen.
P310 Sofort GIFTINFORMATIONSZENTRUM/Arzt/ anrufen.
P320 Besondere Behandlung dringend erforderlich
P377 Brand von ausstr?mendem Gas: Nicht l?schen, bis Undichtigkeit gefahrlos beseitigt werden kann.
P381 Bei Undichtigkeit alle Zündquellen entfernen.
P403 An einem gut belüfteten Ort aufbewahren.
P403+P233 An einem gut belüfteten Ort aufbewahren. Beh?lter dicht verschlossen halten.
P405 Unter Verschluss aufbewahren.
P410+P403 Vor Sonnenbestrahlung schützen. An einem gut belüfteten Ort aufbewahren.
P501 Inhalt/Beh?lter ... (Entsorgungsvorschriften vom Hersteller anzugeben) zuführen.

Diboran (6) Chemische Eigenschaften,Einsatz,Produktion Methoden

ERSCHEINUNGSBILD

FARBLOSES KOMPRIMIERTES GAS MIT CHARAKTERISTISCHEM GERUCH.

PHYSIKALISCHE GEFAHREN

Das Gas mischt sich leicht mit Luft. Bildung explosionsf?higer Gemische.

CHEMISCHE GEFAHREN

Der Stoff polymerisiert zu flüssigem Pentaboran. Reagiert heftig mit Oxidationsmitteln. Schnelle Zersetzung beim Erhitzen unter Bildung von Wasserstoff, Bors?ure und Boroxid.

ARBEITSPLATZGRENZWERTE

TLV: 0.1 ppm; 0.1 mg/m?; (ACGIH 2005).
MAK: IIb (nicht festgelegt, aber Informationen vorhanden))(DFG 2006)

AUFNAHMEWEGE

Aufnahme in den K?rper durch Inhalation. Schwerwiegende lokale Wirkungen.

INHALATIONSGEFAHREN

Eine gesundheitssch?dliche Konzentration des Gases in der Luft wird beim Entweichen aus dem Beh?lter sehr schnell erreicht.

WIRKUNGEN BEI KURZZEITEXPOSITION

WIRKUNGEN BEI KURZZEITEXPOSITION:
Der Stoff ist ?tzend auf die Augen, die Haut und die Atemwege. Inhalation kann zu Lungen?dem führen (s. Anm.). Die Auswirkungen treten u.U. verz?gert ein. Exposition kann zum Tod führen.

WIRKUNGEN NACH WIEDERHOLTER ODER LANGZEITEXPOSITION

Inhalation kann asthma?hnliche Reaktionen ausl?sen (RADS).

LECKAGE

Gefahrenbereich verlassen! Fachmann zu Rate ziehen! Pers?nliche Schutzausrüstung: Vollschutzanzug mit umgebungsluftunabh?ngigem Atemschutzger?t. Zündquellen entfernen. Ausstr?men des Gases stoppen. Belüftung.

R-S?tze Betriebsanweisung:

R12:Hochentzündlich.
R23/24/25:Giftig beim Einatmen, Verschlucken und Berührung mit der Haut.
R36/37/38:Reizt die Augen, die Atmungsorgane und die Haut.

S-S?tze Betriebsanweisung:

S9:Beh?lter an einem gut gelüfteten Ort aufbewahren.
S16:Von Zündquellen fernhalten - Nicht rauchen.
S36/37/39:Bei der Arbeit geeignete Schutzkleidung,Schutzhandschuhe und Schutzbrille/Gesichtsschutz tragen.
S45:Bei Unfall oder Unwohlsein sofort Arzt zuziehen (wenn m?glich, dieses Etikett vorzeigen).

Beschreibung

Diborane is a colorless gas at room temperature and atmospheric pressure. It has an unpleasant, distinctive, sickly sweet odor. Diborane is a highly flammable gas that forms a flammable mixture with air over a range of 0.9 percent to 98 percent diborane (at 1 atm). Diborane bums in air (or oxygen) with a blue to green flame. Diborane is considered pyrophoric at room temperature. The gas is easily ignited by a spark or the heat of reaction with moisture in air.
Pure diborane is insensitive to mechanical shock; however, shock and thermally sensitive mixtures may be formed in the presence of impurities such as oxygen, water, halogenated hydrocarbons, and so on. Thermal decomposition of diborane to hydrogen can result in excessive pressure buildup. Vessels for containment of diborane should be designed to contain such resultant decomposition pressure.

Chemische Eigenschaften

Diborane is a compressed, colorless, and flam- mable gas. It has a nauseating, sickly sweet odor.

Verwenden

Diborane is used as a rocket propellant, in thevulcanization of rubber, as a polymerizationcatalyst, as a reducing agent, in the synthesisof trialkyl boranes, and as a doping agent(Merck 1996).

Vorbereitung Methode

Diborane now can be produced more easily and in larger quantities by the reaction of LiH, NaH or alkali borohydrides with BF3 diethyl etherate, To obtain good yields, the alkali hydrides must be very finely powdered.

Air & Water Reaktionen

Highly flammable. Ignites spontaneously in moist air (forms hydrogen and boric acid), [Haz. Chem. Data (1966)]. Oxygen and Diborane form spontaneously explosive mixtures, [J. Amer. Chem. Soc. 76, 1997(1954)].

Reaktivit?t anzeigen

Diborane is a colorless, air and moisture-sensitive gas, highly toxic. Diborane ignites in air. Diborane is very explosive when exposed to heat or flame, on contact with moisture Diborane produces hydrogen gas. Explosive reaction with benzene vapor, chlorine, nitric acid and tetravinyllead [Bretherick, 5th ed., 1995, p. 77]. Explosive reaction with dimethyl sulfoxide [Shriver, 1969, p. 209], violent reaction with halocarbon liquids used as fire extinguishants (e.g., carbon tetrachloride). Reaction with Al or Li produces complex hydrides that may ignite spontaneously in air [Haz. Chem. Data, 1975, p. 114].

Hazard

Diborane is pyrophoric and will ignite upon exposure to air. The boiling point is ?135°F and the flammable range is 0.8%–88% in air. The ignition temperature is 100° (37°C) to 140°F (60°C), and the flash point is 130°F (54°C). Diborane will react violently with halogenated fire-extinguishing agents, such as the halons. The four-digit UN identification number is 1911. The NFPA 704 designation is health 4, flammability 4, and reactivity 3. The white section of the diamond has a W with a slash through it, indicating water reactivity.

Health Hazard

Boranes are highly toxic by inhalation, skin absorption or ingestion. They may produce acute or chronic poisoning. Diborane is an irritant to the lungs and kidneys. The primary effect of Diborane poisoning is lung congestion caused by local tissue irritation produced by the exothermic reaction of hydrolysis.

Brandgefahr

Diborane will ignite spontaneously in moist air at room temperature. Also, Diborane reacts violently with vaporizing liquid-type extinguishing agents. Diborane hydrolyzes in water to hydrogen and boric acid. Incompatible with air, halogenated compounds, aluminum, lithium, active metals, oxidized surfaces, chlorine, fuming nitric acid, nitrogen trifluoride, oxygen, and phosphorus trifluoride. Avoid moist air, electrical sparks, open flames or any other heat source. Hazardous polymerization may occur.

Flammability and Explosibility

Diborane is a flammable gas that ignites spontaneously in moist air at room temperature and forms explosive mixtures with air from 0.8% up to 88% by volume. Diborane reacts with halogenated hydrocarbons, and fire extinguishing agents such as Halon or carbon tetrachloride are therefore not recommended. Carbon dioxide extinguishers should be used to fight diborane fires. Fires involving diborane sometimes release toxic gases such as boron oxide smoke.

Materials Uses

Common metals are suitable as materials of construction. These include the following metals and metal alloys: chrome-molybdenum steel, Type 300 stainless steel, brass, lead, Monel, K-Monel, and nickel. Piping and appurtenances for undiluted diborane must be designed by experienced engineers and safety and fire protection specialists. Saran, polyethylene, Kel-F, Teflon, graphite, and high-vacuum silicone grease are satisfactory for use with diborane.
In addition to the ability of a material to withstand chemical attack, the evaluation of materials compatibility with diborane should also emphasize the effect of the material on diborane stability (as expressed by the decomposition rate). The use of the following materials is not recommended:
? Metal oxides
? Natural rubbers
? Neoprene
? Leak-lock
? Permatex
? Ordinary oil and grease
? Nordel 1145 RPT elastomer, unfilled and Si02-filled
? silicon elastomer, unfilled and SiOrfilled
? CIS-4 polybutadiene elastomer, unfilled and SiOrfilled

m?gliche Exposition

Diborane is used as the source of boron in the semiconductor industry; as a catalyst for olefin polymerization; a rubber vulcanizer; a reducing agent; a flame-speed accelerator; a chemical intermediate for other boron hydrides; as a doping agent; in rocket propel- lants, and in the conversion of olefins to trialkyl boranes and primary alcohols.

Lager

diborane should be used only in a fume hood free of ignition sources and should be stored in a cold, dry, wellventilated area separated from incompatible substances and isolated from sources of sparks and open flames.

Versand/Shipping

UN1911 Diborane, Hazard Class: 2.3; Labels: 2.3-Poisonous gas, 2.1-Flammable gas Inhalation Hazard Zone A. Cylinders must be transported in a secure upright position, in a well-ventilated truck. Protect cylinder and labels from physical damage. The owner of the compressed gas cylinder is the only entity allowed by federal law (49CFR) to transport and refill them. It is a violation of transportation regulations to refill compressed gas cylinders without the express written permission of the owner.

Inkompatibilit?ten

A strong reducing agent. Unstable above 8 C. The presence of contaminants may lower the autoigni- tion temperature; ignition may take place at, or below, room temperature. Diborane can polymerize, forming liquid pentaborane (See P:0190). It ignites spontaneously in moist air; and on contact with water, hydrolyzes exothermically forming hydrogen and boric acid. Contact with halogenated compounds (including fire extinguishers) may cause fire and explosion. Contact with aluminum, lithium and other active metals form hydrides which may ignite spontane- ously. Incompatible with aluminum, carbon tetrachloride; nitric acid; nitrogen trifluoride and many other chemicals. Reacts with oxidized surfaces. Attacks some plastics, rubber or coatings.

Waste disposal

Return refillable compressed gas cylinders to supplier. Incineration with aqueous scrub- bing of exhaust gases to remove B2O3 particulates.

Diboran (6) Upstream-Materialien And Downstream Produkte

Upstream-Materialien

Downstream Produkte

19287-45-7(Diboran (6))Verwandte Suche:


  • Diborane(6)
  • diborane,b2h6
  • diboranemixtures
  • Chebi:33590
  • DIBORANE, 10% IN HYDROGEN, ELECTRONIC GR ADE
  • borine
  • Diboron hexahydride
  • Diboronhexahydride
  • dlborane
  • Boroethane
  • DIBORANE
  • QSJRRLWJRLPVID-UHFFFAOYSA-N
  • B2H6
  • Boron hydride (B2H6)
  • Diboran
  • borone
  • 19287-45-7
  • Synthetic Reagents
  • Compressed and Liquefied Gases
  • BoranesChemical Synthesis
  • Compressed and Liquefied GasesVapor Deposition Precursors
  • Gases
  • Precursors by Metal
  • Reduction
  • Synthetic Reagents
  • Inorganics
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