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Phosphortribromid Produkt Beschreibung

Phosphorus tribromide Struktur
7789-60-8
CAS-Nr.
7789-60-8
Bezeichnung:
Phosphortribromid
Englisch Name:
Phosphorus tribromide
Synonyma:
PBr3;extrema[qr];tribroMophosphane;tribromophosphine;Phosphortribromid;phosphrous broMide;phosphorousbromide;PHOSPHORUS BROMIDE;Phosphorous bromide;Phosphorus tribroMid
CBNumber:
CB8372891
Summenformel:
Br3P
Molgewicht:
270.69
MOL-Datei:
7789-60-8.mol

Phosphortribromid Eigenschaften

Schmelzpunkt:
-41.5 °C (lit.)
Siedepunkt:
175 °C (lit.)
Dichte
2.88 g/mL at 20 °C (lit.)
Dampfdichte
9.3 (vs air)
Dampfdruck
0.27 psi ( 54 °C)
Brechungsindex
n20/D 1.697(lit.)
Flammpunkt:
172.9°C
storage temp. 
Store below +30°C.
Aggregatzustand
Liquid
Wichte
2.88
Farbe
Clear to slightly hazy colorless to yellow or light brown
Geruch (Odor)
Irritating odour
Wasserlöslichkeit
reacts
FreezingPoint 
-40℃
Sensitive 
Moisture Sensitive
Merck 
14,7357
BRN 
3903060
Stabilität:
Stable, but reacts violently with water. Incompatible with moisture, strong bases, strong oxidizing agents, reactive metals, acids, alcohols.
InChIKey
IPNPIHIZVLFAFP-UHFFFAOYSA-N
CAS Datenbank
7789-60-8(CAS DataBase Reference)
NIST chemische Informationen
Phosphorus tribromide(7789-60-8)
EPA chemische Informationen
Phosphorus tribromide (7789-60-8)
Sicherheit
  • Risiko- und Sicherheitserklärung
  • Gefahreninformationscode (GHS)
Kennzeichnung gefährlicher C
R-Sätze: 34-37-40-14-67
S-Sätze: 26-45-36/37-36/37/39
RIDADR  UN 3264 8/PG 2
WGK Germany  2
RTECS-Nr. TH4460000
21
TSCA  Yes
HS Code  2812 90 00
HazardClass  8
PackingGroup  II
Giftige Stoffe Daten 7789-60-8(Hazardous Substances Data)
Bildanzeige (GHS)
Alarmwort Achtung
Gefahrenhinweise
Code Gefahrenhinweise Gefahrenklasse Abteilung Alarmwort Symbol P-Code
H314 Verursacht schwere Verätzungen der Haut und schwere Augenschäden. Ätzwirkung auf die Haut Kategorie 1B Achtung P260,P264, P280, P301+P330+ P331,P303+P361+P353, P363, P304+P340,P310, P321, P305+ P351+P338, P405,P501
H318 Verursacht schwere Augenschäden. Schwere Augenschädigung Kategorie 1 Achtung P280, P305+P351+P338, P310
H335 Kann die Atemwege reizen. Spezifische Zielorgan-Toxizität (einmalige Exposition) Kategorie 3 (Atemwegsreizung) Warnung
H336 Kann Schläfrigkeit und Benommenheit verursachen. Spezifische Zielorgan-Toxizität (einmalige Exposition) Kategorie 3 (Schläfrigkeit und Benommenheit) Warnung P261, P271, P304+P340, P312,P403+P233, P405, P501
H351 Kann vermutlich Krebs verursachen. Karzinogenität Kategorie 2 Warnung P201, P202, P281, P308+P313, P405,P501
H373 Kann die Organe schädigen bei längerer oder wiederholter Exposition. Spezifische Zielorgan-Toxizität (wiederholte Exposition) Kategorie 2 Warnung P260, P314, P501
Sicherheit
P261 Einatmen von Staub vermeiden.
P280 Schutzhandschuhe/Schutzkleidung/Augenschutz tragen.
P310 Sofort GIFTINFORMATIONSZENTRUM/Arzt/ anrufen.
P301+P330+P331 BEI VERSCHLUCKEN: Mund ausspülen. KEIN Erbrechen herbeiführen.
P303+P361+P353 BEI BERÜHRUNG MIT DER HAUT (oder dem Haar): Alle kontaminierten Kleidungsstücke sofort ausziehen. Haut mit Wasser abwaschen oder duschen.
P305+P351+P338 BEI KONTAKT MIT DEN AUGEN: Einige Minuten lang behutsam mit Wasser spülen. Eventuell vorhandene Kontaktlinsen nach Möglichkeit entfernen. Weiter spülen.
P405 Unter Verschluss aufbewahren.

Phosphortribromid Chemische Eigenschaften,Einsatz,Produktion Methoden

R-Sätze Betriebsanweisung:

R34:Verursacht Verätzungen.
R37:Reizt die Atmungsorgane.
R40:Verdacht auf krebserzeugende Wirkung.
R14:Reagiert heftig mit Wasser.

S-Sätze Betriebsanweisung:

S26:Bei Berührung mit den Augen sofort gründlich mit Wasser abspülen und Arzt konsultieren.
S45:Bei Unfall oder Unwohlsein sofort Arzt zuziehen (wenn möglich, dieses Etikett vorzeigen).
S36/37:Bei der Arbeit geeignete Schutzhandschuhe und Schutzkleidung tragen.
S36/37/39:Bei der Arbeit geeignete Schutzkleidung,Schutzhandschuhe und Schutzbrille/Gesichtsschutz tragen.

Chemische Eigenschaften

Phosphorus tribromide is a colourless liquid(possibly hazy)  with the formula PBr3. It fumes in air due to hydrolysis and has a penetrating odour. It is widely used in the laboratory for the conversion of alcohols toalkyl bromides.
Phosphorus tribromide (PBr3) is commonly used in Hell-Volhard-Zelinsky halogenation for the α-bromination of carboxylic acids to form the corresponding acyl bromide. It is also useful for the conversion of primary and secondary alcohols to alkyl bromides.

Verwenden

Phosphorus tribromide is used mainly for the conversion of alcohols to alkyl bromides and it is used in tests for skin corrosivity. It is used for alkene preparation and it act as a lewis base and a lewis acid. Phosphorus tribromide is used in the manufacture of pharmaceuticals such as alprazolam, methohexital and fenoprofen.
Phosphorus tribromide may be used as a reagent:
In a novel protocol for synthesizing 7-ethoxy-1-(p-ethylphenoxy)-3,7-dimethyl-2-octene, a synthetic juvenile hormone mimic of trans,trans,cis-10,11-epoxy-7-ethyl-3,11-dimethyltrideca-2,6-dienoate.
To synthesize 1,2,3-diazaphosphinane, 1,2,3-thiazaphosphinine and 1,2-azaphosphole bearing a chromone ring.
To synthesize 1-Bromoundec-1-ene from 10-undecen-1-ol.

synthetische

Phosphorus tribromide, PBr3, is most conveniently prepared by reaction between liquid bromine and a solution of white phosphorus in PBr3. In most of its reactions, the tribromide resembles the trichloride although the former has been much less studied and in some cases the products seem to be more complex.

Reaktionen

Silyl phosphites such as (EtO)2POSiMe3 and (Et3SiO)3P are known. The latter compound can be prepared in 30% yield by reacting phosphorus tribromide with an organosilane in the presence of zinc chloride. Esters of the former type can be made by reaction.
3Et3SiO+PBr3–-(Et3SiO)3+3RBr
Et3SiONa+(EtO)2PCl–-(EtO)2POSiEt3+NaCl)

Allgemeine Beschreibung

A colorless fuming liquid with a pungent odor. Corrosive to metals and tissue. Boiling point 347°F (175°C). Freezing point -40°F (-40°C).

Air & Water Reaktionen

Fumes in air. Decomposed by water to form phosphoric acid and hydrobromic acid. Reaction with warm water is very rapid and may be violent [Mellor v.8. 1032 1940].

Reaktivität anzeigen

Phosphorus tribromide reacts with oxidizing agents to generate heat and products that may be flammable, combustible, or otherwise reactive; the reactions may be violent. Forms complexes with potassium or sodium metal that explode when shocked. Drop wise addition to 3-phenylpropanol caused an explosion when stirring of the mixture was discontinued [Chem. Brit., 1974, 10, 101-102].

Health Hazard

Inhalation causes severe irritation of nose, throat, and lungs. Ingestion causes burns of mouth and stomach. Contact with eyes or skin causes severe burns.

Sicherheitsprofil

Probably highly toxic. A corrosive irritant to the eyes, skin, and mucous membranes. Wdl react with water, steam, or acids to produce heat, toxic and corrosive fumes. Violent reaction or ignition with calcium hydroxide + sodium carbonate, phenylpropanol, sulfuric acid, oleum, fluorosulfuric acid, chlorosulfuric acid, 1,1,1 -tris(hydroxymethyl)methane, water, potassium, sodium, RuO4. When heated to decomposition it emits very toxic fumes of Brand POx. See also PHOSPHIDES and BROMIDES.

läuterung methode

It is decomposed by moisture, it should be kept dry and is corrosive. Purify it by distillation through an efficient fractionating column [see Whitmore & Lux J Am Chem Soc 54 3451] in a slow stream of dry N2, i.e. under strictly dry conditions. [Gay & Maxson Inorg Synth II 147 1946, Org Synth Col Vol II 358 1943.] Dissolve it in CCl4, dry it over CaCl2, filter and distil it. Store it in sealed ampoules under N2 and keep it away from light. HARMFUL VAPOURS.

Phosphortribromid Upstream-Materialien And Downstream Produkte

Upstream-Materialien

Downstream Produkte


Phosphortribromid Anbieter Lieferant Produzent Hersteller Vertrieb Händler.

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