1,1,1,3,5,5,5-Heptamethyltrisiloxane
Basic information
- CAS
1873-88-7- Standard SMILES
C[Si](O[Si](C)(C)C)O[Si](C)(C)C- InChIKey
SWGZAKPJNWCPRY-UHFFFAOYSA-N- Molecular formula
- C7H21O2Si3
- Average molar mass
- 221.5 g/mol
- Monoisotopic mass
- 221.08493451
Overview
See also: Methicone (related); Methicone (20 CST) (annotation moved to); Poly(methyl hydrogen siloxane) (annotation moved to) ... View More ...
Names & identifiers
- Preferred name
- 1,1,1,3,5,5,5-Heptamethyltrisiloxane
- English name
- 1,1,1,3,5,5,5-Heptamethyltrisiloxane
- Molecular formula
- C7H22O2Si3
- Molecular weight
- 222.5
Names & synonyms
1,1,1,3,5,5,5-Heptamethyltrisiloxane1873-88-7Trisiloxane, 1,1,1,3,5,5,5-heptamethyl-DTXSID1038795Methylbis(trimethylsilyloxy)silaneMethylbis(trimethylsiloxy)silaneRVY9659R8Cheptamethyl trisiloxaneEINECS 217-496-1DTXCID9018795EC 217-496-1SIB-1844
Show more names
heptamethyltrisiloxaneMDHM1,1,1,3,5,5,5-heptamethyl-trisiloxan40M25)CFS-887Bis(trimethyLCo-Formula CFS-887HeptametrisiloxaneBis(trimethylsiloxy)
HEPTAMETHYL TRISILOXANE [USP-RS]HEPTAMETHYL TRISILOXANE (USP-RS)RefChem:409412217-496-1Bis(trimethylsiloxy)methylsilanemethyl-bis(trimethylsilyloxy)siliconMFCD00048000UNII-RVY9659R8C
Database identifiers
- CAS
1873-88-7- PubChem CID
- 6327366
- ChEMBL
CHEMBL3988892- UNII
- RVY9659R8C
- EC Number
- 217-496-1
- Nikkaji
- J199.684C
Properties
Computed structural properties
- Topological polar surface area
- 18.5 Ų
- Hydrogen bond donors
- 0
- Hydrogen bond acceptors
- 2
- Rotatable bonds
- 4
- Heavy atoms
- 12
- Formal charge
- 0
- Complexity
- 121
Experimental & physicochemical properties
Physical DescriptionLiquid
Physicochemical properties
- Melting point
- 0 °C · <0°C
- Boiling point
- 142 °C · 142 °C
- Density
- 0.82 · 0.82
- vapor pressure
- 8.5 hPa · 8.5hPa at 25℃
- refractive index
- 1.38 · 1.38
- Flash point
- 22 °C · 22 °C
- storage temp.
- 15 · 15-25°C
- solubility
- Chloroform (Soluble), Methanol (Slightly)
- form
- clear liquid
- color
- Colorless to Almost colorless
- Specific Gravity
- 0.8136 · 0.8136
- Viscosity
- 1.1 mm2/s · 1.1mm2/s
- Water Solubility
- Miscible with acetone, ethanol, diethyl ether. Insoluble in water.
- Hydrolytic Sensitivity
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 (29.2%): Highly Flammable liquid and vapor [Danger Flammable liquids]
P210, P233, P240, P241, P242, P243, P261, P264, P264+P265, P271, P280, P302+P352, P303+P361+P353, P304+P340, P305+P351+P338, P319, P321, P332+P317, P337+P317, P362+P364, P370+P378, P403+P233, P403+P235, P405, and P501 (click each P-code to see the statement)
Aggregated GHS information provided per 161 reports by companies from 8 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.
Hazard information
Regulatory Information
Chemical: Trisiloxane, 1,1,1,3,5,5,5-heptamethyl-
Trisiloxane, 1,1,1,3,5,5,5-heptamethyl- is listed on the EPA's Chemical Data Reporting (CDR) system. Manufacturers and importers of Trisiloxane, 1,1,1,3,5,5,5-heptamethyl- 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: 1,1,1,3,5,5,5-heptamethyltrisiloxane (EC: 217-496-1)
Trisiloxane, 1,1,1,3,5,5,5-heptamethyl-: Does not have an individual approval but may be used as a component in a product covered by a group standard. It is not approved for use as a chemical in its own right.
Hazard Classes and CategoriesFlam. Liq. 2 (29.2%)
Safety data
- F
- 10-21
- PPE
- Eyeshields, Faceshields, Gloves, type ABEK (EN14387) respirator filter
- wgk
- 3
- tsca
- TSCA listed
- ridadr
- UN 1993 3/PG 2
- hs_code
Chemistry & industry
Uses & manufacturing
U.S. Production2023: 5,500,000 - <7,000,000 lb
Industry UsesIntermediate
General Manufacturing Information
All Other Chemical Product and Preparation Manufacturing
Trisiloxane, 1,1,1,3,5,5,5-heptamethyl-: ACTIVE
Applications
UsesHeptamethyltrisiloxane is used to catalyze reduction reactions in organic syntheses.
DescriptionBis (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.
Uses1,1,1,3,5,5,5-Heptamethyltrisiloxane is a Basic material for synthetic polyalkyleneoxide modified heptamethyltrisiloxane which is a kind of specific structure surfactant for pesticide additives, coating additives, etc.
UsesBis(trimethylsiloxy)methylsilane is an important raw material and intermediate used in organic synthesis, pharmaceutical and dyestuff.
Uses1,1,1,3,5,5,5-Heptamethyltrisiloxane can be used for the aromatic C-H silylation of arenes in the presence of a platinum complex catalyst.It can also be used as a reagent to synthesize: 3-Octyl-1,1,1,3,5,5,5-heptamethyltrisiloxane, an agricultural adjuvant and sensory performance enhancer used in cosmetic formulations.Isoindigo-based conjugated polymer with siloxane-terminated solubilizing group.Monosiloxy esters with a variety of acids.
Upstream & downstream products
Upstream raw materials
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