2',5'-Dihydroxypropiophenon

Gefahreninformationscode (GHS)

• Bildanzeige (GHS)

  

• Alarmwort

  Warnung

• Gefahrenhinweise

  H315：Verursacht Hautreizungen.

  H319：Verursacht schwere Augenreizung.

  H335：Kann die Atemwege reizen.

• Sicherheit

  P261：Einatmen von Staub vermeiden.

  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.

  P405：Unter Verschluss aufbewahren.

2',5'-DIHYDROXYPROPIOPHENONE Chemische Eigenschaften,Einsatz,Produktion Methoden

• R-Sätze Betriebsanweisung:

  R36/37/38:Reizt die Augen, die Atmungsorgane und die Haut.

• S-Sätze Betriebsanweisung:

  S37/39:Bei der Arbeit geeignete Schutzhandschuhe und Schutzbrille/Gesichtsschutz tragen.
  S26:Bei Berührung mit den Augen sofort gründlich mit Wasser abspülen und Arzt konsultieren.

• Chemische Eigenschaften

  yellowish crystalline powder

• synthetische

  Preparation by Fries rearrangement of quinol dipropionate (hydroquinone dipropionate),
  with aluminium chloride without solvent at 130–140° for 4 h (75%), ? at 142° for 30 min (80%), at 160–165° for 3 h (good yields) or at 190–200° for 90 min (60%)
  by using various quantities of aluminium chloride at 180° for 2 h (to see ? below)
  with aluminium chloride (2 equiv) in nitromethane at 20° for a week (7%) ? or in nitrobenzene (24%)
  with boron trifluoride complex (BF? 3-OBu2) at reflux for 1 h (42%)
  by using titanium tetrachloride (2 equiv) at 130° for 2 h gave only 6% yield
  Also obtained by treatment of
  hydroquinone dipropionate with aluminium chloride in the presence of hyd-? roquinone (61%)
  2-hydroxy-5-(propionyloxy)propiophenone with aluminium chloride (5 equiv) ? at 180° for 30 min in the presence of hydroquinone (57%)
  Also obtained by acylation of hydroquinone with propionic acid
  in the presence of boron trifluoride in ethylene dichloride at 50–55° (59%) ?, in tetrachloroethane at 90–95° for 5 h (70%) or at 50° for 4 h (70%) or without solvent (67%) at 80° for 2 h (54%) or at 125° for 2 h (71%)
  in the presence of zinc chloride at 190° few min (Nencki reaction)
  in the presence of 70% perchloric acid at reflux for 1 h (12%)
  Also obtained by Friedel–Crafts acylation of hydroquinone with propionyl chlo-ride in nitrobenzene in the presence of aluminium chloride (40%)
  Also obtained from 2-hydroxy-5-(propionyloxy)propiophenone; the ester group elimination on hydrolysis with 85% sulfuric acid at r.t. or by treatment with by aluminium chloride
  Also obtained by reaction of benzoquinone (2.5 equiv) with 2-oxobutanoic acid in aqueous acetonitrile or an acetonitrile/methylene chloride mixture (91%).

2',5'-DIHYDROXYPROPIOPHENONE Upstream-Materialien And Downstream Produkte

2',5'-Dihydroxypropiophenon Anbieter Lieferant Produzent Hersteller Vertrieb Händler.

Global(60)Suppliers

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