1,1,3,3-Tetramethyldisiloxane
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Basic information
- CAS
30110-74-8- Standard SMILES
C[Si](C)O[Si](C)C- InChIKey
NVYQDQZEMGUESH-UHFFFAOYSA-N- Molecular formula
- C4H12OSi2
- Average molar mass
- 132.31 g/mol
- Monoisotopic mass
- 132.04266807
Names & identifiers
- Preferred name
- 1,1,3,3-Tetramethyldisiloxane
- English name
- 1,1,3,3-TETRAMETHYLDISILOXANE
- Molecular formula
- C4H14OSi2
- Molecular weight
- 134.32
Names & synonyms
1,1,3,3-Tetramethyldisiloxane3277-26-7sym-TetramethyldisiloxaneDISILOXANE, 1,1,3,3-TETRAMETHYL-DTXSID3052010EINECS 221-906-4((CH3)2SiH)2O(CH3)2HSiOSiH(CH3)2DTXCID6030574EC 221-906-4T 2030CT2030
Show more names
TETRAMETHYLDISILOXANESILOXANE HSI2
RefChem:70940221-906-4NVYQDQZEMGUESH-UHFFFAOYSA-NBis(dimethylsilyl) etherDimethylsilyl etherDisiloxane, tetramethyl-Bis(dimethylsilyl) oxide30110-74-8
Database identifiers
- CAS
30110-74-8、3277-26-7- PubChem CID
- 6327482
- UNII
- 9HC8F6L8F3
- EC Number
- 221-906-4、250-053-0
- Nikkaji
- J7.707K
Properties
Computed structural propertiesFilling in
- Topological polar surface area
- 9.2 Ų
- Hydrogen bond donors
- 0
- Hydrogen bond acceptors
- 1
- Rotatable bonds
- 2
- Heavy atoms
- 7
- Formal charge
- 0
- Complexity
- 39
Experimental & physicochemical properties
Chemical ClassesMetals -> Metalloid Compounds (Silicon)
Physical Description
Liquid
Clear liquid; [Gelest MSDS]
Physicochemical properties
- Boiling point
- 70 · 70-71 °C(lit.)
- Density
- 0.76 g/mL · 0.76 g/mL at 25 °C(lit.)
- refractive index
- 20 · n20/D 1.370(lit.)
- Flash point
- 14 °F · 14 °F
- storage temp.
- 2 · 2-8°C
- InChI
- InChI=1S/C4H14OSi2/c1-6(2)5-7(3)4/h6-7H,1-4H3
- InChIKey
- NVYQDQZEMGUESH-UHFFFAOYSA-N
- SMILES
- [SiH](C)(C)O[SiH](C)C
- EPA Substance Registry System
- Disiloxane, tetramethyl- (30110-74-8)
- Symbol(GHS)
- 2 · GHS02,GHS07
- Signal word
- Danger
Safety & regulation
Safety information is for reference only and does not replace the supplier’s Safety Data Sheet (SDS), applicable regulations, or professional assessment.
GHS classification
GHS Classification
Danger
H225 (100%): Highly Flammable liquid and vapor [Danger Flammable liquids]
P203, P210, P233, P240, P241, P242, P243, P280, P303+P361+P353, P318, P370+P378, P403+P235, P405, and P501 (click each P-code to see the statement)
Aggregated GHS information provided per 220 reports by companies from 5 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.
This chemical does not meet GHS hazard criteria for 3.1% (3 of 96) of reports.
Danger
Hazard information
Regulatory Information
Chemical: Disiloxane, 1,1,3,3-tetramethyl-
Chemical: Disiloxane, tetramethyl-
Disiloxane, 1,1,3,3-tetramethyl- is listed on the EPA's Chemical Data Reporting (CDR) system. Manufacturers and importers of Disiloxane, 1,1,3,3-tetramethyl- are required to report information about their production and use of this chemical to the EPA under the Toxic Substances Control Act (TSCA). (40 eCFR Part 711)
REACH registered substance: 1,1,3,3-tetramethyldisiloxane (EC: 221-906-4)
1,1,3,3-Tetramethyldisiloxane: Does not have an individual approval but may be used under an appropriate group standard
Hazards SummaryA severe eye irritant; [Gelest MSDS] See Hexamethyldisiloxane.
Hazard Classes and Categories
Flam. Liq. 2 (96.9%)
Flam. Liq. 2 (100%)
Safety data
- F
- 10-21
- wgk
- 3
- tsca
- TSCA listed
- rtecs
- JN1000000
Chemistry & industry
Uses & manufacturing
U.S. Production2023: 400,000 - <550,000 lb
Industry UsesIntermediate
General Manufacturing Information
All Other Chemical Product and Preparation Manufacturing
Disiloxane, 1,1,3,3-tetramethyl-: ACTIVE
Disiloxane, tetramethyl-: ACTIVE
Applications
UsesReduces aromatic aldehydes to benzyl halides. Used in the reductive halogenation of aldehydes and epoxides.
Related reactions
35 records
Compound notes
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