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Cas Database

Name	Phenyltris(trimethylsiloxy)silane	EINECS	218-320-6
CAS No.	2116-84-9	Density	0.93 g/cm³
PSA	27.69000	LogP	4.38700
Solubility	6.6μg/L at 23℃	Melting Point	-102 °C
Formula	C₁₅H₃₂O₃Si₄	Boiling Point	315.4 °C at 760 mmHg
Molecular Weight	372.759	Flash Point	128.6 °C
Transport Information	N/A	Appearance	N/A
Safety	26-36	Risk Codes	36/37/38
Molecular Structure		Hazard Symbols	Xi
Synonyms	Trisiloxane,1,1,1,5,5,5-hexamethyl-3-phenyl-3-(trimethylsiloxy)- (6CI,7CI,8CI);1,1,1,5,5,5-Hexamethyl-3-phenyl-3-(trimethylsilyloxy)trisiloxane;Baysilon PD 5;DC 556;Dow 556 Fluid;Dow Corning 556;Dow Corning 556 Fluid;PD 5 silicone;Silicone DC 556;Tris(trimethylsiloxy)phenylsilane;	Article Data	18

Phenyltris(trimethylsiloxy)silane Synthetic route

: 75-77-4
chloro-trimethyl-silane

: phenyltri(benzyloxy)silane

: 2116-84-9
1,1,5,5,5-hexamethyl-3-phenyl-3-[(trimethylsilyl)oxy]trisiloxane

Conditions

Conditions	Yield
With 5%-palladium/activated carbon In ethyl acetate at 20℃; for 12h;	94%
With palladium 10% on activated carbon In ethyl acetate at 20℃; for 9h; Inert atmosphere;	89 %Spectr.
With 10 mol% palladium on carbon In ethyl acetate at 20℃; for 24h;	89 %Spectr.

: 13688-55-6
trimethylsilyl acrylate

: 17938-35-1
phenyltriallyloxysilane

A: 999-55-3
allyl acrylate

B: 2116-84-9
1,1,5,5,5-hexamethyl-3-phenyl-3-[(trimethylsilyl)oxy]trisiloxane

Conditions

Conditions	Yield
With ammonium trifluoromethanesulfonate; 4-methoxy-phenol at 60℃; for 8h;	A 93.7% B n/a

: 993-07-7
trimethylsilan

: 98-13-5
Phenyltrichlorosilane

: 2116-84-9
1,1,5,5,5-hexamethyl-3-phenyl-3-[(trimethylsilyl)oxy]trisiloxane

Conditions

Conditions	Yield
Stage #1: trimethylsilan With dihydrogen peroxide In toluene at 20℃; for 1.5h; Stage #2: Phenyltrichlorosilane With triethylamine In toluene for 2h;	93%

: 75-77-4
chloro-trimethyl-silane

: 3047-74-3
phenylsilanetriol

: 2116-84-9
1,1,5,5,5-hexamethyl-3-phenyl-3-[(trimethylsilyl)oxy]trisiloxane

Conditions

Conditions	Yield
With pyridine In toluene for 7h; Heating;	84.6%

: 34136-85-1
1,1,1-trimethyl-3-phenyl-3,3-difluorodisiloxane

A: 420-56-4
trimethylsilyl fluoride

B: 368-47-8
phenyltrifluorosilane

C: 2116-84-9
1,1,5,5,5-hexamethyl-3-phenyl-3-[(trimethylsilyl)oxy]trisiloxane

D: C18H28F2O3Si4

Conditions

Conditions	Yield
at 20℃; Further byproducts given;

: 34136-85-1
1,1,1-trimethyl-3-phenyl-3,3-difluorodisiloxane

A: 368-47-8
phenyltrifluorosilane

B: 2116-84-9
1,1,5,5,5-hexamethyl-3-phenyl-3-[(trimethylsilyl)oxy]trisiloxane

C: 34136-84-0
1,1,1,5,5,5-hexamethyl-3-phenyl-3-fluorotrisiloxane

D: C18H28F2O3Si4

Conditions

Conditions	Yield
at 20℃; Further byproducts given;

: 34136-85-1
1,1,1-trimethyl-3-phenyl-3,3-difluorodisiloxane

A: 2116-84-9
1,1,5,5,5-hexamethyl-3-phenyl-3-[(trimethylsilyl)oxy]trisiloxane

B: 34136-84-0
1,1,1,5,5,5-hexamethyl-3-phenyl-3-fluorotrisiloxane

C: 34224-10-7
1,1,3,3-tetrafluoro-1,3-diphenyl-1,3-disiloxane

D: C18H28F2O3Si4

Conditions

Conditions	Yield
at 20℃; Further byproducts given;

: 98-13-5
Phenyltrichlorosilane

sodium trimethylsilanolate: sodium trimethylsilanolate

: 2116-84-9
1,1,5,5,5-hexamethyl-3-phenyl-3-[(trimethylsilyl)oxy]trisiloxane

: 2996-92-1
phenyl trimethylsiloxane

: 2116-84-9
1,1,5,5,5-hexamethyl-3-phenyl-3-[(trimethylsilyl)oxy]trisiloxane

Conditions

Conditions	Yield
Multi-step reaction with 2 steps 1: 68 percent / acetic acid / H2O / 4 h / 5 - 10 °C 2: 84.6 percent / pyridine / toluene / 7 h / Heating View Scheme

: 18027-10-6
sodium trimethylsilanolate

: 98-13-5
Phenyltrichlorosilane

: 2116-84-9
1,1,5,5,5-hexamethyl-3-phenyl-3-[(trimethylsilyl)oxy]trisiloxane

Conditions

Conditions	Yield
In pyridine
In pyridine

Phenyltris(trimethylsiloxy)silane Chemical Properties

IUPAC Name: Trimethyl-[phenyl-bis(trimethylsilyloxy)silyl]oxysilane
Empirical Formula: C₁₅H₃₂O₃Si₄
Molecular Weight: 372.7548
Freely Rotating Bonds: 7
Polar Surface Area: 27.69 Å²Index of Refraction: 1.457
Molar Refractivity: 108.66 cm³
Molar Volume: 398.4 cm³
Polarizability: 43.07× 10^-24cm³
Surface Tension: 22.2 dyne/cm
Density: 0.93 g/cm³
Flash Point: 128.6 °C
Enthalpy of Vaporization: 53.44 kJ/mol
Boiling Point: 315.4 °C at 760 mmHg
Vapour Pressure: 0.000812 mmHg at 25°C
The Cas Register Number of Methyl phenyl polysiloxane is 2116-84-9.The chemical synonyms of Methyl phenyl polysiloxane (CAS NO.2116-84-9) are 1,1,5,5,5-Hexamethyl-3-phenyl-3-((trimethylsilyl)oxy)trisiloxane and Trisiloxane, 1,1,1,5,5,5-hexamethyl-3-phenyl-3-((trimethylsilyl)oxy)- .The molecular structure of Methyl phenyl polysiloxane (CAS NO.2116-84-9) is
.

Phenyltris(trimethylsiloxy)silane Uses

Methyl phenyl polysiloxane (CAS NO.2116-84-9) is used as pharmaceutical intermediate.

Phenyltris(trimethylsiloxy)silane Safety Profile

Hazard Codes: Irritant Xi
Risk Statements: 36/37/38
R36/37/38: Irritating to eyes, respiratory system and skin.
Safety Statements: 26-36
S26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.
S36: Wear suitable protective clothing.
WGK Germany: 1
F: 10-21
TSCA: Yes

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