| Identification | More | [Name]
Bis(trimethylsiloxy)methylsilane | [CAS]
1873-88-7 | [Synonyms]
1,1,1,3,5,5,5-HEPTAMETHYLTRISILOXANE
BIS(TRIMETHYLSILOXY)METHYLSILANE
DOW CORNING 1107 WATER REPELLENT AND POWDER TREATMENT
1,1,1,3,5,5,5-heptamethyl-trisiloxan
3H-Heptamethyltrisiloxane
1,1,1,3,5,5,5-HEPTAMETHYLTRISILOXANE, 97 %
40M25)
40M40,commercialgrade
1,1,1,3,5,5,5-Heptamethyltrisiloxane(Bis(trimethylsiloxy)methylsilane)
Bis-(trimethylsilyloxy)-methylsilane
Methylbis(trimethylsilyloxy)silane
1,1,1,3,5,5,5-Heptamethylpentanetrisiloxane
Methylbis(trimethylsiloxy)silane | [EINECS(EC#)]
217-496-1 | [Molecular Formula]
C7H22O2Si3 | [MDL Number]
MFCD00048000 | [Molecular Weight]
222.5 | [MOL File]
1873-88-7.mol |
| Chemical Properties | Back Directory | [Appearance]
colourless liquid | [Melting point ]
<0°C | [Boiling point ]
142 °C (lit.) | [density ]
0.819 g/mL at 25 °C(lit.)
| [vapor pressure ]
8.5hPa at 25℃ | [refractive index ]
n20/D 1.382(lit.)
| [Fp ]
82 °F
| [storage temp. ]
15-25°C | [solubility ]
Chloroform (Soluble), Methanol (Slightly) | [form ]
clear liquid | [color ]
Colorless to Almost colorless | [Specific Gravity]
0.8136 | [Stability:]
Stable. Flammable. Incompatible with strong oxidizing agents. | [Water Solubility ]
Miscible with acetone, ethanol, diethyl ether. Insoluble in water. | [Hydrolytic Sensitivity]
3: reacts with aqueous base | [BRN ]
1748455 | [InChIKey]
QNWOFLWXQGHSRH-UHFFFAOYSA-N | [LogP]
6.2 at 20℃ | [CAS DataBase Reference]
1873-88-7(CAS DataBase Reference) | [NIST Chemistry Reference]
Trisiloxane, 1,1,1,3,5,5,5-heptamethyl-,(1873-88-7) | [EPA Substance Registry System]
1873-88-7(EPA Substance) |
| Safety Data | Back Directory | [Hazard Codes ]
Xi | [Risk Statements ]
R10:Flammable.
R36/37/38:Irritating to eyes, respiratory system and skin . | [Safety Statements ]
S26:In case of contact with eyes, rinse immediately with plenty of water and seek medical advice .
S36:Wear suitable protective clothing . | [RIDADR ]
UN 1993 3/PG 2
| [WGK Germany ]
3
| [F ]
10-21 | [TSCA ]
Yes | [HazardClass ]
3 | [PackingGroup ]
II | [HS Code ]
29319090 |
| Questions and Answers (Q&A) | Back Directory | [Description]
Bis (trimethylsiloxy) methylsilane acts as an important raw material
and intermediate used in organic synthesis, pharmaceutical and
dyestuff. For example, it can be used for the platinum-catalyzed
aromatic C-H silylation of arenes. It can also be used for the
silylation of aryl iodides. | [References]
https://www.alfa.com/zh-cn/catalog/H60586/
Murata, Miki, et al. "Silylation of Aryl Iodides with 1,1,1,3,5,5,5 -Heptamethyltrisiloxane Catalyzed by Transition-Metal Complexes." Synlett 2007.09(2007):1387-1390.
Murata, Miki, et al. "Platinum-Catalyzed Aromatic C—H Silylation of Arenes with 1,1,1,3,5,5,5-Heptamethyltrisiloxane." Cheminform38.50 (2007):no-no.
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| Hazard Information | Back Directory | [Chemical Properties]
colourless liquid | [Flammability and Explosibility]
Flammable | [Toxics Screening Level]
The ITSL for heptamethyltrisiloxane has been changed from 0.04 μg/m3 to 0.1 μg/m3 based on an annual averaging time. |
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