Paroxypropion Chemische Eigenschaften,Einsatz,Produktion Methoden
R-S?tze Betriebsanweisung:
R36/37/38:Reizt die Augen, die Atmungsorgane und die Haut.
S-S?tze Betriebsanweisung:
S37:Geeignete Schutzhandschuhe tragen.
S24/25:Berührung mit den Augen und der Haut vermeiden.
S36:DE: Bei der Arbeit geeignete Schutzkleidung tragen.
S26:Bei Berührung mit den Augen sofort gründlich mit Wasser abspülen und Arzt konsultieren.
Chemische Eigenschaften
white powder
Verwenden
Intermediates of Liquid Crystals
synthetische
Preparation by Fries rearrangement of phenyl propionate
with aluminium chloride in refluxing carbon disulfide ? then at 130–150° for 2–3 h after solvent elimination (45–50%)
with aluminium chloride in nitrobenzene at 50° for 18 h (72%) or at ? 20° for 48 h (60%)
with aluminium chloride in nitromethane at 20° for 7–8 days (80%)
with aluminium chloride in chlorobenzene using microwave irradiation for ? 3 min at 106° (62%)
with aluminium chloride in ethylene dichloride at 95° for 5 h or in heptane at ? 80–90° for 7 h (36%), in benzene or in tetrachloroethane at 80°; with aluminium chloride in the presence of propionyl chloride at 50–60° for ? 6 h (49%)
with aluminium chloride without solvent at 50° for 10 h
with titanium tetrachloride in nitromethane at 20° for 7 days (56%) or ? without solvent at 50° for 10 h (39%)
with polyphosphoric acid at 100° (61%)
with boron trifluoride at 50° for 3 h (46%)
with stannic chloride at 50° for 3 h (10%).
Sicherheitsprofil
Poison by
intraperitoneal, subcutaneous, and parenteral
routes. An experimental teratogen. Other
experimental reproductive effects. A
flammable liquid. When heated to
decomposition it emits acrid smoke and
irritating fumes. See also KETONES.
l?uterung methode
4'-Hydroxypropiophenone [70-70-2] M 150.2, m 149o, b 140-145o/0.5mm, 8.05. Crystallise the phenone from H2O (m 149.8-150.2o) or EtOH (m 147o). The benzoyl derivative has m 117o, and the semicarbazone has m 183o (EtOH). [Beilstein 8 H 102, 8 II 104, 8 III 379.]
Paroxypropion Upstream-Materialien And Downstream Produkte
Upstream-Materialien
Downstream Produkte
