1,3-Dichlorotetramethyldisiloxane

Bezeichnung:1,3-Dichlorotetramethyldisiloxane

CAS-Nr2401-73-2

Englisch Name:1,3-Dichlorotetramethyldisiloxane

CBNumberCB2297482

SummenformelC4H12Cl2OSi2

Molgewicht203.21

MOL-Datei2401-73-2.mol

1,3-Dichlorotetramethyldisiloxane physikalisch-chemischer Eigenschaften

Schmelzpunkt	-37 °C
Siedepunkt	138 °C (lit.)
Dichte	1.039 g/mL at 25 °C (lit.)
Brechungsindex	n20/D 1.407(lit.)
Flammpunkt	15 °C
storage temp.	Flammables area
Aggregatzustand	liquid
Farbe	Colorless to Almost colorless
Wichte	1.038
Wasserlöslichkeit	Reacts with water.
Sensitive	Moisture Sensitive
Hydrolytic Sensitivity	8: reacts rapidly with moisture, water, protic solvents
BRN	1741218
InChI	1S/C4H12Cl2OSi2/c1-8(2,5)7-9(3,4)6/h1-4H3
InChIKey	DMEXFOUCEOWRGD-UHFFFAOYSA-N
SMILES	C[Si](C)(Cl)O[Si](C)(C)Cl
CAS Datenbank	2401-73-2(CAS DataBase Reference)
EPA chemische Informationen	Disiloxane, 1,3-dichloro-1,1,3,3-tetramethyl- (2401-73-2)

Sicherheit

Kennzeichnung gefährlicher	F,C
R-Sätze:	11-34
S-Sätze:	16-26-27-36/37/39-45
RIDADR	UN 2985 3/PG 2
WGK Germany	3
F	10-21
TSCA	TSCA listed
HazardClass	3
PackingGroup	II
HS Code	29319090
Speicherklasse	3 - Flammable liquids
Hazard Classifications	Flam. Liq. 2 Skin Corr. 1B

Gefahreninformationscode (GHS)

1,3-Dichlorotetramethyldisiloxane Chemische Eigenschaften,Einsatz,Produktion Methoden

R-Sätze Betriebsanweisung:
R11:Leichtentzündlich.
R34:Verursacht Verätzungen.
S-Sätze Betriebsanweisung:
S16:Von Zündquellen fernhalten - Nicht rauchen.
S26:Bei Berührung mit den Augen sofort gründlich mit Wasser abspülen und Arzt konsultieren.
S27:Beschmutzte, getränkte Kleidung sofort ausziehen.
S36/37/39:Bei der Arbeit geeignete Schutzkleidung,Schutzhandschuhe und Schutzbrille/Gesichtsschutz tragen.
S45:Bei Unfall oder Unwohlsein sofort Arzt zuziehen (wenn möglich, dieses Etikett vorzeigen).
Chemische Eigenschaften
clear colorless liquid
Verwenden
1,3-Dichlorotetramethyldisiloxane is used to produce 1,1,3,3-tetramethyl-disiloxane-1,3-diol. It is also used as Chemical Additives. Pharmaceutical intermediates.
Synthese

3277-26-7

2401-73-2

General procedure: The chlorination reaction needs to be carried out in THF to ensure that all Si-H bonds are chlorinated, using TCCA as the chlorinating agent (molar ratio 1:1, TCCA:siloxane). This was done as follows: 1,1,3,3-tetramethyldisiloxane and THF (ratio 20 ml THF/g siloxane) were added to the reaction flask and the mixture was cooled to -20 °C. TCCA was added in batches with vigorous stirring, and after the addition of TCCA, stirring was continued for 15 min, after which the cooling bath was removed and the reaction mixture was allowed to warm slowly to room temperature. It should be noted that the chain length of the siloxane, the type of substituent and the position of the Si-H bond may affect the method of isolation and characterization of the subsequent products. Upon completion of the reaction, THF and unreacted TCCA should be removed immediately to avoid denaturation of the products during storage.
Einzelnachweise
[1] Journal of Organometallic Chemistry, 2007, vol. 692, # 10, p. 1892 - 1897
[2] Journal of Organometallic Chemistry, 2018, vol. 875, p. 1 - 4
[3] Journal of the Chemical Society [Section] A: Inorganic, Physical, Theoretical, 1970, p. 1641 - 1642

1,3-Dichlorotetramethyldisiloxane Upstream-Materialien And Downstream Produkte

1,3-Dichlorotetramethyldisiloxane Anbieter Lieferant Produzent Hersteller Vertrieb Händler.

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