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Silanes and silicones

Ethoxytrimethylsilane

Also known as Ethyl trimethylsilyl ether, Silane, trimethylethoxy-, Trimethylsilyl ethyl ether

CAS 1825-62-3Formula C5H14OSiMolar mass 118.25 g/molEC 217-370-6
GHS signal word: Danger. Pictograms: Flammable, Harmful or irritant 11 suppliers listed
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Ethoxytrimethylsilane chemical structure, C5H14OSi, CAS 1825-62-3
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
1825-62-3
Formula
C5H14OSi
Molar mass
118.25 g/mol
Physical form
Liquid
HS code
293190
Category
Silanes and silicones
Illustrative photo, 25 litre white jerry cans of liquid in a warehouse
Typical packagingIllustrative packaging image, not the actual product

What is Ethoxytrimethylsilane?

Plain description, key identifiers and synonyms

Ethoxytrimethylsilane is a chemical substance with the molecular formula C5H14OSi and a molar mass of 118.25 g/mol. Its CAS registry number is 1825-62-3. The IUPAC name is ethoxy(trimethyl)silane.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
ethoxy(trimethyl)silane
CAS number
1825-62-3 CAS number cross-checked
EC number
217-370-6
Molecular formula
C5H14OSi
UNII
82883M7A40
MDL number
MFCD00009069
InChIKey
RSIHJDGMBDPTIM-UHFFFAOYSA-N
InChI
InChI=1S/C5H14OSi/c1-5-6-7(2,3)4/h5H2,1-4H3
SMILES (canonical and isomeric)
CCO[Si](C)(C)C

Synonyms

  • Ethyl trimethylsilyl ether
  • Silane, trimethylethoxy-
  • Trimethylsilyl ethyl ether
  • 4-04-00-03994 (Beilstein Handbook Reference)
  • Trimethylethoxysilane
  • Silane, ethoxytrimethyl-
  • ethoxy(trimethyl)silane
  • trimethyl ethoxy silane
  • Ethoxytri(methyl)silane
  • Ethanol, TMS derivative
  • Ethoxytrimethylsilane, 98%

Physical and chemical properties

Measured values and descriptors computed from the structure

Physical and chemical properties

Measured values, check the supplier specification for your grade

Physical form
Liquidexp.

Values vary by grade. Ask suppliers for the COA or TDS of the batch you buy.

Computed descriptors

Calculated from the structure, useful for screening and formulation

Molecular weight
118.25 g/molcalc.
Exact mass
118.0814 Dacalc.
LogP (octanol/water)
1.86calc.
Topological polar surface area
9.23 Ųcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
1calc.
Rotatable bonds
2calc.
Heavy atoms
7calc.
Rings
0calc.
Aromatic rings
0calc.
Fraction sp3 carbons
1calc.
Formal charge
0calc.
Stereocentres
0calc.
Lipinski rule of five
Passes (0 violations)calc.

Calculated for screening. Confirm critical figures with the supplier.

Safety and hazards

GHS classification summary, not a safety data sheet

GHS signal word
Danger
GHS02: Flammable
Flammable
GHS07: Harmful or irritant
Harmful or irritant

Hazard statements

  • H225Highly flammable liquid and vapour.
  • H302Harmful if swallowed.
  • H315Causes skin irritation.
  • H319Causes serious eye irritation.
  • H335May cause respiratory irritation.
Precautionary statements (28)
  • P210Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. No smoking.
  • P233Keep container tightly closed.
  • P240Ground and bond container and receiving equipment.
  • P241Use explosion-proof electrical, ventilating and lighting equipment.
  • P242Use non-sparking tools.
  • P243Take action to prevent static discharges.
  • P261Avoid breathing dust, fume, gas, mist, vapours or spray.
  • P264Wash skin thoroughly after handling.
  • P264 + P265Wash skin thoroughly after handling. Do not touch eyes.
  • P270Do not eat, drink or smoke when using this product.
  • P271Use only outdoors or in a well-ventilated area.
  • P280Wear protective gloves, protective clothing, eye protection and face protection.
  • P301 + P317If swallowed: Get medical help.
  • P302 + P352If on skin: Wash with plenty of water.
  • P303 + P361 + P353If on skin (or hair): Take off immediately all contaminated clothing. Rinse skin with water or shower.
  • P304 + P340If inhaled: Remove person to fresh air and keep comfortable for breathing.
  • P305 + P351 + P338If in eyes: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
  • P319Get medical help if you feel unwell.
  • P321Specific treatment (see supplemental first aid instructions on the label).
  • P330Rinse mouth.
  • P332 + P317If skin irritation occurs: Get medical help.
  • P337 + P317If eye irritation persists: Get medical help.
  • P362 + P364Take off contaminated clothing. And wash it before reuse.
  • P370 + P378In case of fire: Use appropriate media to extinguish.
  • P403 + P233Store in a well-ventilated place. Keep container tightly closed.
  • P403 + P235Store in a well-ventilated place. Keep cool.
  • P405Store locked up.
  • P501Dispose of contents and container in accordance with local regulations.

GHS classification summary, not a safety data sheet (SDS). Classifications can differ by supplier, grade and concentration. Always check the supplier's SDS.

Full safety data and first aid

Ethoxytrimethylsilane suppliers

Sponsored listings first, then the documented ranking: membership, verification, replies, completeness, freshness and ratings

All 11 suppliers
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Where suppliers are based

11 suppliers in 3 countries

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Ethoxytrimethylsilane price

Indicative price range per kg from live supplier offers

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Uses and applications

What the substance is used for, by industry and function

Industrial uses: Intermediate.

Regulatory status

Inventories, regulations and trade controls that list this substance

United States

  • TSCA inventory (USA)
    Status: Active in US commerce

HS code and trade data

Customs classification and reported world trade statistics

Global trade

World import and export statistics for the HS code Ethoxytrimethylsilane is traded under.

HS 2931.90Indicative HS code

Organo-inorganic compounds, other than tetramethyl lead, tetraethyl lead, tributyltin compounds…

World exports in 2024
$3.97B
+5.3% vs 2023, imports $3.93B
2019 to 2024
Top exporters
  1. China28.3%
  2. United States15.6%
  3. Germany15.1%
Top importers
  1. United States14.6%
  2. China13.0%
  3. South Korea8.5%
Reported customs values in USD, not prices.Full trade data

The HS code shown for Ethoxytrimethylsilane is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

Quick answers about Ethoxytrimethylsilane, based on the data on this page

What is Ethoxytrimethylsilane?

Ethoxytrimethylsilane is a chemical substance with the molecular formula C5H14OSi and a molar mass of 118.25 g/mol. Its CAS registry number is 1825-62-3. The IUPAC name is ethoxy(trimethyl)silane.

What is the CAS number of Ethoxytrimethylsilane?

The CAS registry number of Ethoxytrimethylsilane is 1825-62-3.

What is the molecular formula and weight of Ethoxytrimethylsilane?

The molecular formula of Ethoxytrimethylsilane is C5H14OSi and its molar mass is 118.25 g/mol.

What is Ethoxytrimethylsilane used for?

Industrial uses: Intermediate.

Is Ethoxytrimethylsilane hazardous?

Ethoxytrimethylsilane carries the GHS signal word "Danger". Main hazards: highly flammable liquid and vapour, harmful if swallowed, causes skin irritation. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of Ethoxytrimethylsilane?

Ethoxytrimethylsilane is usually classified under HS code 293190 (X. ORGANO-INORGANIC COMPOUNDS, HETEROCYCLIC COMPOUNDS, NUCLEIC ACIDS AND THEIR SALTS…). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Ethoxytrimethylsilane?

CompoundList lists 11 suppliers of Ethoxytrimethylsilane in China, United States and Germany. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

What is the price of Ethoxytrimethylsilane?

Suppliers quote Ethoxytrimethylsilane on request because prices depend on grade, purity, quantity and destination. A free request on CompoundList gets you several quotes to compare.

Guides for buyers

Practical guides that help when you source, ship or handle Ethoxytrimethylsilane

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Data last updated 7 Oct 2026. Details may have changed, please confirm them with the supplier. Report an error on this page
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