4-Methylacetophenon

Bezeichnung:4-Methylacetophenon

CAS-Nr122-00-9

Englisch Name:4'-Methylacetophenone

CBNumberCB5852945

SummenformelC9H10O

Molgewicht134.18

MOL-Datei122-00-9.mol

Synonyma

4'-Methylacetophenon

4-Methylacetophenon

4-Methylacetophenon physikalisch-chemischer Eigenschaften

Schmelzpunkt	22-24 °C (lit.)
Siedepunkt	226 °C (lit.)
Dichte	1.004 g/mL at 20 °C 1.005 g/mL at 25 °C (lit.)
Dampfdruck	0.52 hPa (25 °C)
FEMA	2677 \| 4'-METHYLACETOPHENONE
Brechungsindex	n20/D 1.533(lit.)
Flammpunkt	198 °F
storage temp.	Store below +30°C.
Löslichkeit	2.07g/l
Aggregatzustand	Liquid
Farbe	Clear colorless to pale yellow
Geruch (Odor)	at 10.00 % in dipropylene glycol. hawthorn sweet mimosa coumarin cherry acetophenone
Geruchsart	floral
Explosionsgrenze	1.00%(V)
Wasserlöslichkeit	0.37 g/L (15 ºC)
JECFA Number	807
BRN	606053
InChIKey	GNKZMNRKLCTJAY-UHFFFAOYSA-N
LogP	2.1 at 25℃
CAS Datenbank	122-00-9(CAS DataBase Reference)
NIST chemische Informationen	Ethanone, 1-(4-methylphenyl)-(122-00-9)
EPA chemische Informationen	Ethanone, 1-(4-methylphenyl)- (122-00-9)

Sicherheit

Kennzeichnung gefährlicher	Xn
R-Sätze:	36/37/38-22-20/21/22
S-Sätze:	26-27-37/39-24/25-23-36
RIDADR	UN 1325 4.1/PG 2
WGK Germany	3
RTECS-Nr.	AM9463000
TSCA	Yes
HS Code	29143900
Toxizität	LD50 orally in Rabbit: 1400 mg/kg LD50 dermal Rabbit > 2000 mg/kg

Gefahreninformationscode (GHS)

4'-Methylacetophenone Chemische Eigenschaften,Einsatz,Produktion Methoden

R-Sätze Betriebsanweisung:
R36/37/38:Reizt die Augen, die Atmungsorgane und die Haut.
R22:Gesundheitsschädlich beim Verschlucken.
R20/21/22:Gesundheitsschädlich beim Einatmen,Verschlucken und Berührung mit der Haut.
S-Sätze Betriebsanweisung:
S26:Bei Berührung mit den Augen sofort gründlich mit Wasser abspülen und Arzt konsultieren.
S27:Beschmutzte, getränkte Kleidung sofort ausziehen.
S37/39:Bei der Arbeit geeignete Schutzhandschuhe und Schutzbrille/Gesichtsschutz tragen.
S24/25:Berührung mit den Augen und der Haut vermeiden.
S23:Gas/Rauch/Dampf/Aerosol nicht einatmen(geeignete Bezeichnung(en) vom Hersteller anzugeben).
S36:DE: Bei der Arbeit geeignete Schutzkleidung tragen.
Beschreibung
4'-Methylacetophenone has a fruity, floral odor resembling acetophenone and a sweet, strawberry-like flavor. May be prepared by slow addition of acetyl chloride to a mixture of toluene and AlCl in an ice bath and under vacuum, maintaining the temperature at +5°C and then letting it increase to +20°C.
Chemische Eigenschaften
4'-Methylacetophenone has been identified in Brazilian rosewood oil and in pepper. It occurs as colorless crystals with a floral, sweet odor that is milder than that of acetophenone. 4-Methylacetophenone is prepared from toluene and acetic anhydride or acetyl chloride by a Friedel–Crafts reaction. It is used for blossom notes in mimosaand hawthorn-type perfumes, especially soap perfumes.
Occurrence
Reported found in the essential oil distilled from the wood of Myrocarpus fastigiatus, Myrocarpus frondo sus, Bois de Rose. Also reported found in sour cherry, orange and grapefruit peel oil, black currants, guava, peach, blackberry, celery, potato, tomato, mentha oils, pepper, parsley, smoked fish, cognac, parmesan cheese, cocoa, tea, soybean, cloudberry, mango, cauliflower, broccoli, rice bran, buckwheat, dried bonito, cherimoya, calabash nutmeg and mastic gum leaf oil, cooked cabbage, mandarin juice.
Verwenden
4'-Methylacetophenone is a methylated acteophenone used in cosmetics and perfumery. The presence of 4'-Methylacetophenone has been shown to accelerate the photopolymerization of Methyl methacrylate.
Verwenden
4'-Methylacetophenone is used as a flavoring agent. It reacts with morpholine to get 4-(p-tolyl-thioacetyl)-morpholine in the presence of sulfur as a reagent. Further, it is used as an intermediate in the manufacture of active pharmaceutical ingredients, perfumes and cosmetics.
synthetische
By slow addition of acetyl chloride to a mixture of toluene and AlCl in an ice bath and under vacuum, maintaining the temperature at +5°C and then letting it increase to +20°C.
Definition
ChEBI: 4'-Methylacetophenone is an aromatic ketone. It is a metabolite found in or produced by Saccharomyces cerevisiae.
Taste threshold values
Taste characteristics at 20 ppm: sweet, creamy, fruity, cherry and heliotropine-like.
Synthesis Reference(s)
Journal of the American Chemical Society, 110, p. 2560, 1988 DOI: 10.1021/ja00216a032
Tetrahedron Letters, 27, p. 2965, 1986 DOI: 10.1016/S0040-4039(00)84691-2
Allgemeine Beschreibung
4′-Methylacetophenone is a clear colourless to pale yellowish liquid that occurs naturally in mango, tomato and orange.
Sicherheitsprofil
Moderately toxic by ingestion. A human skin irritant. A flammable liquid. When heated to decomposition it emits acrid smoke and irritating fumes. See also KETONES.
läuterung methode
Impurities, including the o-and m-isomers, are removed by forming the semicarbazone (m 212-213.5o) which, after repeated crystallisation, is hydrolysed to the ketone. [Brown & Marino J Am Chem Soc 84 1236 1962.] It can also be purified by distillation under reduced pressure, followed by low temperature crystallisation from isopentane. [Beilstein 7 IV 701.]

4'-Methylacetophenone Upstream-Materialien And Downstream Produkte

4-Methylacetophenon Anbieter Lieferant Produzent Hersteller Vertrieb Händler.

122-00-9, 4'-Methylacetophenone Verwandte Suche:

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