Vinyltrimethoxysilane
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Basic information
- CAS
2768-02-7- Standard SMILES
C=C[Si](OC)(OC)OC- InChIKey
NKSJNEHGWDZZQF-UHFFFAOYSA-N- Molecular formula
- C5H12O3Si
- Average molar mass
- 148.23 g/mol
- Monoisotopic mass
- 148.05557077
Names & identifiers
- Preferred name
- Vinyltrimethoxysilane
- IUPAC
- ethenyl(trimethoxy)silane
- English name
- Vinyltrimethoxysilane
- Molecular formula
- C5H12O3Si
- Molecular weight
- 148.23
Names & synonyms
Vinyltrimethoxysilane2768-02-7TrimethoxyvinylsilaneSilane, ethenyltrimethoxy-Ethenyltrimethoxysilane(Trimethoxysilyl)etheneSilane, trimethoxyvinyl-Vinyl trimethoxy silaneDTXSID20292400ZIU135UESA 171 (Silane derivative)DYNASYLAN SILFIN
Show more names
VTMSa171VTMOethenyltrimethoxy-Silanekbm1003vts-mCo-Formula CFS-027Vinymethyltrimethoxysilane
KBM 1003SZ 6300DTXCID509240A 171V 4917Y 4302RefChem:901966220-449-8
Database identifiers
- CAS
2768-02-7- PubChem CID
- 76004
- DTXSID
DTXSID2029240- UNII
- 0ZIU135UES
- EC Number
- 220-449-8、688-602-5
- Nikkaji
- J54.326H
Properties
Computed structural propertiesFilling in
- Topological polar surface area
- 27.7 Ų
- Hydrogen bond donors
- 0
- Hydrogen bond acceptors
- 3
- Rotatable bonds
- 4
- Heavy atoms
- 9
- Formal charge
- 0
- Complexity
- 81.9
Experimental & physicochemical properties
Chemical ClassesOther Classes -> Other Organic Compounds
SpringerMaterials PropertiesViscosity
Density
1.13 @25 °C
Specific Density: 0.94 (water = 1)
SolubilityWater Solubility: 1,000,000 mg/L at 20°C (modeled data).
Flash Point25.5°C
Boiling Point
123 °C @760 [mm Hg]
123°C at 1013 hPa (converted to 101.3 kPa) (760 mm Hg)
Melting Point−97°C
Vapor Pressure11.9 hPa (converted to 1.19 kPa) at 20°C
Food Contact Substances
FCS -> FDA Cumulative Estimated Daily Intake (CEDI)
FCS -> FDA Inventory of Effective Food Contact Substance (FCS) Notifications
Physical Description
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
Warning
H317: May cause an allergic skin reaction [Warning Sensitization, Skin]
P261, P272, P280, P302+P352, P321, P333+P317, P362+P364, and P501 (click each P-code to see the statement)
This chemical does not meet GHS hazard criteria for 7.7% (104 of 1358) of reports.
Danger
H226 (55%): Flammable liquid and vapor [Warning Flammable liquids]
Hazard information
Regulatory Information
Chemical: Silane, ethenyltrimethoxy-
Status: Active Update: 05-04-2023 https://echa.europa.eu/registration-dossier/-/registered-dossier/14728
Trimethoxyvinylsilane: Does not have an individual approval but may be used under an appropriate group standard
Other Safety InformationEvaluation - Chemicals that are unlikely to require further regulation to manage risks to environment
Hazards Summary
Dermal LD50 (rabbit) = 3.36 mL/kg; Oral LD50 (rat) = 7.34 mL/kg; [ChemIDplus] A mild skin and eye irritant; Causes somnolence, ataxia, and dermatitis in dermal lethal-dose studies of rabbits; Causes changes in fluid intake, hematuria, and weight loss in 9-day intermittent inhalation study of rats (750 ppm/6hr/day); [RTECS] Sensitive to moisture; A skin irritant; May cause serious eye injury; Harmful by inhalation; [Alfa Aesar MSDS]
Hazard Classes and Categories
Flam. Liq. 3 (55%)
Not Classified
Skin sensitisation - category 1B
Flammable liquids - Category 2
Skin sensitization - Category 1B
Skin Sens. 1B
Safety & protection
Chemistry & industry
Uses & manufacturing
Uses
The typical concentration of VTMS in industrial products is from 1 to 2%. VTMS undergoes reactions, resulting in minimal or no residual chemical in the final products. It serves as a coupling agent for plastics and wire and cable pipes, acts as a moisture scavenger in sealants, and functions as a co-monomer in latex dispersions to enhance adhesion on inorganic surfaces. VTMS is managed within closed systems (hard piped) in manufacturing environments, and it is not used in consumer products.
Household ProductsInformation on 20 consumer products that contain Trimethoxyvinylsilane in the following categories is provided:
General Manufacturing InformationSilane, ethenyltrimethoxy-: ACTIVE
Applications
DescriptionVinyltrimethoxysilane, is used as a polymer modifier via grafting reactions. The resulting pendant trimethoxysilyl groups can function as moisture-activated crosslinking sites. The Silane grafted polymer is processed as a thermoplastic and crosslinking occurs after fabrication of the finished article upon exposure to moisture. Vinyltrimethoxysilane is mainly applied in these aspects: In the preparation of moisture-curing polymers, e.g. polyethylene. Silane crosslinked polyethylene is widely used as cable isolation, and sheathing mainly in low voltage applications as well as for hot water/sanitary pipes and underfloor heating. As a co-monomer for the preparation of different polymers such as polyethylene or acrylics. Those polymers show an improved adhesion to inorganic surfaces and they can also be crosslinked with moisture. As an efficient adhesion promoter for various mineral-filled polymers, improving mechanical and electrical properties especially after exposure to moisture. Improving the compatibility of fillers with polymers, leading to a better dispersibility, reduced melt viscosity and easier processing of filled plastics. Pre-treating of glass, metals, or ceramic surfaces, improve the adhesion of coatings on these surfaces and corrosion resistance. As moisture scavenger, it reacts rapidly with water. This effect is used widely in sealants.
Related reactions
27 records
Compound notes
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