Hexamethyldisiloxan

Bezeichnung:Hexamethyldisiloxan

CAS-Nr107-46-0

Englisch Name:Hexamethyldisiloxane

CBNumberCB2446352

SummenformelC6H18OSi2

Molgewicht162.38

MOL-Datei107-46-0.mol

Synonyma

Hexamethyldisiloxan

Hexamethyldisiloxan physikalisch-chemischer Eigenschaften

Schmelzpunkt	−59 °C(lit.)
Siedepunkt	101 °C(lit.)
Dichte	0.764 g/mL at 20 °C(lit.)
Dampfdichte	>1 (vs air)
Dampfdruck	20 hPa (20 °C)
Brechungsindex	n20/D 1.377(lit.)
Flammpunkt	33 °F
storage temp.	Store below +30°C.
Löslichkeit	0.00037g/l insoluble
Aggregatzustand	liquid
Wichte	0.76
Farbe	Colorless to Almost colorless
Explosionsgrenze	0.5-21.8%(V)
Wasserlöslichkeit	insoluble
Hydrolytic Sensitivity	1: no significant reaction with aqueous systems
BRN	1736258
Dielectric constant	2.2（20℃）
Stabilität	Stable, but moisture sensitive. Highly flammable. Incompatible with strong acids, strong bases, oxidizing agents.
InChIKey	UQEAIHBTYFGYIE-UHFFFAOYSA-N
LogP	5.06 at 20℃
CAS Datenbank	107-46-0(CAS DataBase Reference)
NIST chemische Informationen	Disiloxane, hexamethyl-(107-46-0)
EPA chemische Informationen	Hexamethyldisiloxane (107-46-0)

Sicherheit

Kennzeichnung gefährlicher	F,N,T
R-Sätze:	11-50/53-65-51/53-48/23/24/25-36/38-46-45
S-Sätze:	16-61-62-45-26-53
RIDADR	UN 1993 3/PG 2
WGK Germany	3
RTECS-Nr.	JM9237000
F	10
Selbstentzündungstemperatur	340 °C
TSCA	Yes
HazardClass	3
PackingGroup	II
HS Code	29310095
Giftige Stoffe Daten	107-46-0(Hazardous Substances Data)
Toxizität	LD50 orally in Rabbit: > 12160 mg/kg LD50 dermal Rat > 2000 mg/kg

Gefahreninformationscode (GHS)

Hexamethyldisiloxane Chemische Eigenschaften,Einsatz,Produktion Methoden

R-Sätze Betriebsanweisung:
R11:Leichtentzündlich.
S-Sätze Betriebsanweisung:
S16:Von Zündquellen fernhalten - Nicht rauchen.
Chemische Eigenschaften
Hexamethyldisiloxane(HMDS) has a very low water solubility and is highly volatile. It is therefore difficult to perform biodegradability and toxicity tests. Experimental data on degradation in water are not available. Based on chemical structure, no aerobic biodegradation of HMDS in water is expected. The half-life of HMDS in marine water is thus expected to be more than 60 days and the persistence (P) criterion is fulfilled.
Physikalische Eigenschaften
Hexamethyldisiloxane is a colorless and transparent liquid. It is easily deliquescent, flammable, and has the risk of causing combustion when exposed to high heat, open flame, and strong oxidizing agents. Boiling point 99.5℃. Flash point -1.1℃. Relative density (d2525) 0.7606. refractive index 1.3750. insoluble in water, soluble in many organic solvents.
Verwenden
The most popular precursor chemical is hexamethyldisiloxane (HMDS) which with the addition of helium and oxygen will produce a silica coating. it is used in a variety of consumer applications and can be used as intermediates in the production of silicone polymers.
Verwenden
Hexamethyldisiloxane can be used as silylating agent for carboxylic acids, and alcohols; used in preparation of aroyl chlorides; precursor for a variety of trimethylsilyl derivatives.Hexamethyldisiloxane has been used as an inexpensive starting material for the preparation of numerous synthetically useful trimethylsilyl derivatives.
Verwenden
Hexamethyldisiloxane is used as a base fluid in a wide range of personal care products that require fast evaporation and high spreadability. When blended with Dimethicone fluids, It can adjust the residence time of the silicone on the skin. Unlike other volatile fluids, Hexamethyldisiloxane Fluid does not cool the skin as it evaporates. Hexamethyldisiloxane is used as a carrying agent and diluent in the following: skin cream lotions, bath oils, suntan lotions, nail polishes, antiperspirants, deodorants, hair sprays and other beauty and hair care products.
A silicon based compound that can be used to create potentially biocompatible materials.
Used as a monomer in the synthesis of long chain polysiloxane structures.
Used in the methylation of mercury(II) salts.
Definition
ChEBI: Hexamethyldisiloxane is an organosiloxane consisting of two trimethylsilyl groups covalently bound to a central oxygen.
Vorbereitung Methode
Produced via acid hydrolysis of chlorotrimethylsilane and purification by distillation.
synthetische
Synthesis of hexamethyldisiloxane by hydrolysis of trimethylsilyl chloride, water and sodium hydroxide.
Allgemeine Beschreibung
Hexamethyldisiloxane (HMDSO), a linear polydisiloxane, is an organosilicon reagent commonly utilized as a source for plasma enhanced chemical vapor deposition (PE-CVD) of thin films of silicon compounds. It is also employed as a substitute to silane in silicon integrated circuit technology. Its dissociative ionization by electron impact has been studied by Fourier transform mass spectrometry. Synthesis of plasma-polymerized HMDSO thin films by atmospheric pressure glow (APG) discharge has been reported. Crystals of HMDSO at 148K are monoclinic. Addition of HMDSO to P₄S₁₀, improves its efficiency as thionating agent.
Flammability and Explosibility
Highly flammable
läuterung methode
Fractionally distil through a column packed with glass helices with ca 15 theoretical 20 1.3777. plates. It is highly flammable and is an irritant. [Mills & McKenzie J Am Chem Soc 76 2672 1954, Csakvari et al. J Organometal Chem 107 287 1976, Beilstein 4 IV 4018.]

Hexamethyldisiloxane Upstream-Materialien And Downstream Produkte

Hexamethyldisiloxan Anbieter Lieferant Produzent Hersteller Vertrieb Händler.

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