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Cas Database |
| Name |
Octamethyltrisiloxane |
EINECS | 203-497-4 |
| CAS No. | 107-51-7 | Density | 0.843 g/cm3 |
| PSA | 18.46000 | LogP | 3.39120 |
| Solubility | 34μg/L at 23℃ | Melting Point |
-82 °C |
| Formula | C8H24O2Si3 | Boiling Point | 152.999 °C at 760 mmHg |
| Molecular Weight | 236.534 | Flash Point | 55.016 °C |
| Transport Information | UN 1993 | Appearance | clear colourless liquid |
| Safety | 23-24/25 | Risk Codes | 10 |
| Molecular Structure |
|
Hazard Symbols | N/A |
| Synonyms |
Trisiloxane,octamethyl- (6CI,8CI,9CI);1,1,1,3,3,5,5,5-Octamethyltrisiloxane;Dimethylbis(trimethylsiloxy)silane;FRD 20;KF 96A1cs;KF 96L1.0;OS 20;OS 20(siloxane);Octamethyltrisiloxane;Pentamethyl(trimethylsiloxy)disiloxane;Pentamethyl(trimethylsilyloxy)disiloxane; |
Article Data | 54 |
Octamethyltrisiloxane Synthetic route
- 75-77-4
chloro-trimethyl-silane
- 18090-13-6, 52698-97-2, 111930-73-5
sodium dimethylsiloxanediolate
- 107-51-7
Octamethyltrisiloxane
| Conditions | Yield |
|---|---|
| In hexane at -40 - -30℃; | 100% |
- 107-46-0
Hexamethyldisiloxane
- 75-78-5
dimethylsilicon dichloride
A
- 75-77-4
chloro-trimethyl-silane
B
- 107-51-7
Octamethyltrisiloxane
C
- 141-62-8
decamethyltetrasiloxane
D
- 141-63-9
dodecamethylpentasiloxane
| Conditions | Yield |
|---|---|
| at 60 - 65℃; for 10h; Further byproducts given; | A 51% B n/a C n/a D n/a |
| Conditions | Yield |
|---|---|
| Stage #1: ethyl trimethylsilyl ether With sodium hydroxide In pyridine at 70℃; for 1.5h; Stage #2: dimethylsilicon dichloride In benzene | 48% |
- 75-77-4
chloro-trimethyl-silane
- 2943-62-6
1-chloro-1,1,3,3,3-pentamethyldisiloxane
A
- 107-51-7
Octamethyltrisiloxane
B
- 4342-25-0
1,2-Bis(trimethylsiloxy)-1,1,2,2-tetramethyl-disilan
C
- 56240-55-2
1-Trimethylsiloxy-pentamethyl-disilan
| Conditions | Yield |
|---|---|
| With lithium In tetrahydrofuran at 20℃; for 96h; Substitution; | A n/a B n/a C 46% |
- 1450-14-2
1,1,1,2,2,2-hexamethyldisilane
A
- 75-76-3
tetramethylsilane
B
- 107-46-0
Hexamethyldisiloxane
C
- 107-51-7
Octamethyltrisiloxane
D
- 541-05-9
Hexamethylcyclotrisiloxane
E
- 141-62-8
decamethyltetrasiloxane
| Conditions | Yield |
|---|---|
| With carbon monoxide; nickel at 200℃; under 750.06 Torr; for 2h; Product distribution; various reagents and reaction conditions; | A n/a B 25.8% C n/a D n/a E n/a |
- 2943-62-6
1-chloro-1,1,3,3,3-pentamethyldisiloxane
A
- 107-51-7
Octamethyltrisiloxane
B
- 4342-25-0
1,2-Bis(trimethylsiloxy)-1,1,2,2-tetramethyl-disilan
| Conditions | Yield |
|---|---|
| Stage #1: 1-chloro-1,1,3,3,3-pentamethyldisiloxane With lithium In tetrahydrofuran for 14h; Metallation; Heating; Stage #2: With chloro-trimethyl-silane In tetrahydrofuran at 20℃; for 24h; Condensation; | A n/a B 23% |
- 141-62-8
decamethyltetrasiloxane
A
- 107-46-0
Hexamethyldisiloxane
B
- 107-51-7
Octamethyltrisiloxane
C
- 141-63-9
dodecamethylpentasiloxane
| Conditions | Yield |
|---|---|
| With molecular sieve at 20 - 100℃; for 0.017 - 24h; Product distribution / selectivity; | A 12.98% B 19.28% C 13.74% |
| With linear phosphonitrilic chloride; diatomaclous earth (Celite 545) at 20 - 100℃; for 0.017 - 24h; Product distribution / selectivity; | A 15.21% B 18.64% C 12.58% |
| With dodecylbenzene-sulphonic acid at 120℃; for 4 - 24h; Product distribution / selectivity; | A 11.16% B 15.02% C 12.46% |
- 99532-16-8
bis(trimethylsiloxy)(trimethylsilyl)methylsilane
A
- 1873-88-7
1,1,1,3,5,5,5-heptamethyltrisiloxan
B
- 107-51-7
Octamethyltrisiloxane
| Conditions | Yield |
|---|---|
| at 850℃; | A 14% B 10% |
| Conditions | Yield |
|---|---|
| With iron(III) chloride |
- 4095-10-7
dimethyldibromosilane
- 107-46-0
Hexamethyldisiloxane
A
- 107-51-7
Octamethyltrisiloxane
B
- 141-62-8
decamethyltetrasiloxane
| Conditions | Yield |
|---|---|
| With iron(III) chloride |
Octamethyltrisiloxane Chemical Properties
IUPAC Name: Trisiloxane, 1,1,1,3,3,5,5,5-octamethyl-
The MF of Trisiloxane, 1,1,1,3,3,5,5,5-octamethyl- (107-51-7) is C8H24O2Si3.
The MW of Trisiloxane, 1,1,1,3,3,5,5,5-octamethyl- (107-51-7) is 236.534.
Synonyms of Trisiloxane, 1,1,1,3,3,5,5,5-octamethyl- (107-51-7): Methylpolysiloxane ; Dimethylbis(trimethylsilyloxy)silane ; Poly(dimethylsiloxane), hydroxy terminated ; Poly(dimethylsiloxane), 200(r) fluid ; Octamethyltrisiloxane ; [(Ch3)3sio]2si(ch3)2 ; 1,1,1,3,3,5,5,5-Octamethyltrisiloxane ; CO9816
Product Categories: Organics;Si (Classes of Silicon Compounds);Siloxanes;Si-O Compounds;Organometallic Reagents;Organosilicon
Form: clear colourless liquid
Index of Refraction: 1.404
EINECS: 203-497-4
Density: 0.843 g/ml
Flash Point: 55 °C
Boiling Point: 153 °C
Melting Point: -86 °C
Storage temp: Flammables area
Merck: 6748
Octamethyltrisiloxane Uses
Trisiloxane, 1,1,1,3,3,5,5,5-octamethyl- (107-51-7) is used as organic synthesis intermediate.
Octamethyltrisiloxane Safety Profile
Safety information of Trisiloxane, 1,1,1,3,3,5,5,5-octamethyl- (107-51-7):
Risk Statements
10 Flammable
Safety Statements
23 Do not breathe gas/fumes/vapor/spray (appropriate wording to be specified by the manufacturer)
24/25 Avoid contact with skin and eyes
RIDADR UN 1993 3/PG 3
WGK Germany 3
F 10-21
TSCA Yes
HazardClass 3.2
PackingGroup III
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