4-Phenylbutenon Chemische Eigenschaften,Einsatz,Produktion Methoden
R-S?tze Betriebsanweisung:
R36/37/38:Reizt die Augen, die Atmungsorgane und die Haut.
R43:Sensibilisierung durch Hautkontakt m?glich.
R42/43:Sensibilisierung durch Einatmen und Hautkontakt m?glich.
S-S?tze Betriebsanweisung:
S7:Beh?lter dicht geschlossen halten.
S26:Bei Berührung mit den Augen sofort gründlich mit Wasser abspülen und Arzt konsultieren.
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).
S37/39:Bei der Arbeit geeignete Schutzhandschuhe und Schutzbrille/Gesichtsschutz tragen.
S24:Berührung mit der Haut vermeiden.
S36/37:Bei der Arbeit geeignete Schutzhandschuhe und Schutzkleidung tragen.
S22:Staub nicht einatmen.
Chemische Eigenschaften
Yellow Solid
Occurrence
Occasionally Benzalacetone is used in perfumery for Sweet Pea (used to be a “must” in this type of fragrance), in Appleblossom, etc., often in combination with Neroli and Hyacinth bases. Also used in flavors, particularly in Chocolate, Cocoa, Cherry, Fruit, Nut, Vanilla, etc. - but usually at very low concentration. Concentration in finished product will rarely exceed 0.2 to 0.5 ppm.
Verwenden
brightener in acid zinc electroplating,also used as an organic synthesis intermediate in flavor and fragrance, pharmaceutical industries
Definition
ChEBI: Trans-benzylideneacetone is the trans-isomer of benzylideneacetone. It acts as an inhibitor of the enzyme phospholipase A2 (EC 3.1.1.4) of insects like diamond back moth. It has a role as a flavouring agent, a fragrance, a bacterial metabolite and an EC 3.1.1.4 (phospholipase A2) inhibitor.
synthetische
By condensing benzaldehyde and acetone in the presence of an alkaline condensing agent.
Reaktionen
Benzalacetone can be utilized for catalytic hydrogenation to yield alcohols, employing Raney nickel as the catalyst. Research has demonstrated that in the presence of HCl and H3PO4, Raney nickel experiences a loss of catalytic activity, resulting in a decreased hydrogenation rate; conversely, NaCl does not exert any significant effect. Although the hydrogenation of the ethylene bond in benzalacetone is inhibited, it is primarily the reduction in hydrogen absorption by the carbonyl group that is more significantly impacted, leading to a marked decrease in the quantity of alcohol produced.
[1]
Allgemeine Beschreibung
trans- 4-Phenyl-3-buten-2-one is substrate for glutathione transferase. It reacts with methyl- and benzylguanidine to yield aromatic
N2-substituted 2-pyrimidinamines.
Sicherheitsprofil
Poison by intravenous route. Moderately toxic by intraperitoneal route. A skin irritant. A flammable liquid. When heated to decomposition it emits acrid smoke and irritating fumes. See also KETONES.
l?uterung methode
Crystallise it from pet ether (b 40-60o), or distil it (b 137-142o /16mm). [Beilstein 7 IV 1003.]
4-Phenylbutenon Upstream-Materialien And Downstream Produkte
Upstream-Materialien
Downstream Produkte
