• Name

  Phenyltris(trimethylsiloxy)silane

• EINECS 218-320-6
• CAS No. 2116-84-9
• Article Data18
• CAS DataBase
• Density 0.93 g/cm³
• 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
• Appearance
• 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;
• PSA 27.69000
• LogP 4.38700

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

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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;

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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;

...Expand

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;

...Expand

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

98-13-5

Phenyltrichlorosilane

2116-84-9

1,1,5,5,5-hexamethyl-3-phenyl-3-[(trimethylsilyl)oxy]trisiloxane

Conditions

Conditions	Yield
Multi-step reaction with 2 steps 1.1: 4-methoxy-phenol / hexane / 4 h / 70 °C 1.2: 0.5 h 2.1: ammonium trifluoromethanesulfonate; 4-methoxy-phenol / 8 h / 60 °C View Scheme

1066-40-6

Trimethylsilanol

694-53-1

phenylsilane

A

C9H16OSi2

B

2116-84-9

1,1,5,5,5-hexamethyl-3-phenyl-3-[(trimethylsilyl)oxy]trisiloxane

Conditions

Conditions	Yield
With sodium triethylborohydride In tetrahydrofuran at 20℃; for 12h; Catalytic behavior; Inert atmosphere; Schlenk technique; Glovebox;	A 55 %Spectr. B 30 %Spectr.

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Phenyltris(trimethylsiloxy)silane Chemical Properties

Phenyltris(trimethylsiloxy)silane Uses

Phenyltris(trimethylsiloxy)silane Safety Profile