Pentamethylbenzol

Bezeichnung:Pentamethylbenzol

CAS-Nr700-12-9

Englisch Name:Pentamethylbenzene

CBNumberCB6854133

SummenformelC11H16

Molgewicht148.24

MOL-Datei700-12-9.mol

Synonyma

Pentamethylbenzol

Pentamethylbenzol physikalisch-chemischer Eigenschaften

Schmelzpunkt	49-51 °C (lit.)
Siedepunkt	231 °C (lit.)
Dichte	0.917 g/mL at 25 °C (lit.)
Brechungsindex	1.5270
Flammpunkt	196 °F
storage temp.	Sealed in dry,Room Temperature
Aggregatzustand	powder to crystal
Farbe	White to Almost white
Wasserlöslichkeit	15.52mg/L(temperature not stated)
BRN	1905349
CAS Datenbank	700-12-9(CAS DataBase Reference)
NIST chemische Informationen	Benzene, pentamethyl-(700-12-9)
EPA chemische Informationen	Benzene, pentamethyl- (700-12-9)

Sicherheit

Kennzeichnung gefährlicher	F,Xi
R-Sätze:	11-36/37/38
S-Sätze:	16-26-36
RIDADR	UN 1325 4.1/PG 2
WGK Germany	3
TSCA	Yes
HazardClass	4.1
PackingGroup	III
HS Code	29029090

Gefahreninformationscode (GHS)

Pentamethylbenzene Chemische Eigenschaften,Einsatz,Produktion Methoden

R-Sätze Betriebsanweisung:
R11:Leichtentzündlich.
R36/37/38:Reizt die Augen, die Atmungsorgane und die Haut.
S-Sätze Betriebsanweisung:
S16:Von Zündquellen fernhalten - Nicht rauchen.
S26:Bei Berührung mit den Augen sofort gründlich mit Wasser abspülen und Arzt konsultieren.
S36:DE: Bei der Arbeit geeignete Schutzkleidung tragen.
Chemische Eigenschaften
Pentamethylbenzene is a white to light yellow crystalline powder with a sweet odor. The compound is classified as an aromatic hydrocarbon. It is a relatively easily oxidized benzene derivative, with E1/2 of 1.95 V vs NHE.
Verwenden
Pentamethylbenzene was used to prepare a mixture of nitropentamethylbenzene and 2,3,4,5-tetramethylbenzyl nitrate. It was also used to prepare propene.
Definition
ChEBI: Pentamethylbenzene is a methylbenzene that is benzene in which five of the hydrogens are replaced by methyl groups.
Synthesis Reference(s)
Synthesis, p. 979, 1985 DOI: 10.1055/s-1985-31413
Synthese
Pentamethylbenzene is obtained as a minor product in the Friedel–Crafts methylation of xylene to durene (1,2,4,5-tetramethylbenzene). Like durene, pentamethylbenzene is rather electron-rich and undergoes electrophilic substitution readily. Indeed, it is used as a scavenger for carbocations.
Pentamethylbenzene has been observed as an intermediate in the formation of hexamethylbenzene from phenol and alkylation of durene or pentamethylbenzene has been reported as a suitable starting material for the synthesis of hexamethylbenzene.
läuterung methode
Successively crystallise it from absolute EtOH, aqueous EtOH, MeOH, toluene *C6H6, and dry it under vacuum. [Rader & Smith J Am Chem Soc 84 1443 1962.] It has also been sublimed. The 1,3,5-trinitrobenzene complex (1:1) has m 121o (EtOH). [Beilstein 5 H 443, 5 III 1010, 5 IV 1109.]
Vorsichtsmaßnahmen
Incompatible with oxidizing agents. Store in cool place. Keep container tightly closed in a dry and well-ventilated place.

Pentamethylbenzene Upstream-Materialien And Downstream Produkte

Pentamethylbenzol Anbieter Lieferant Produzent Hersteller Vertrieb Händler.

700-12-9, Pentamethylbenzene Verwandte Suche:

Send Inquriy