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Silanes and silicones

Methoxytrimethylsilane

Also known as Trimethylmethoxysilane, Silane, methoxytrimethyl-, methoxy(trimethyl)silane

CAS 1825-61-2Formula C4H12OSiMolar mass 104.23 g/molEC 217-369-0
GHS signal word: Danger. Pictograms: Flammable, Harmful or irritant 8 suppliers listed
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Methoxytrimethylsilane chemical structure, C4H12OSi, CAS 1825-61-2
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
1825-61-2
Formula
C4H12OSi
Molar mass
104.23 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 Methoxytrimethylsilane?

Plain description, key identifiers and synonyms

Methoxytrimethylsilane is a chemical substance with the molecular formula C4H12OSi and a molar mass of 104.23 g/mol. Its CAS registry number is 1825-61-2. The IUPAC name is methoxy(trimethyl)silane.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
methoxy(trimethyl)silane
CAS number
1825-61-2 CAS number cross-checked
EC number
217-369-0
Molecular formula
C4H12OSi
UNII
2M9U6DL2PM
MDL number
MFCD00008344, MFCD03458977
InChIKey
POPACFLNWGUDSR-UHFFFAOYSA-N
InChI
InChI=1S/C4H12OSi/c1-5-6(2,3)4/h1-4H3
SMILES (canonical and isomeric)
CO[Si](C)(C)C

Synonyms

  • Trimethylmethoxysilane
  • Silane, methoxytrimethyl-
  • methoxy(trimethyl)silane
  • Methyl trimethylsilyl ether
  • Methyl trimethylsilyl ether, NSC 139858, SS 2010, TSL 8111, Trimethylmethoxysilane
  • (CH3)3SiOCH3
  • Silicone oil CRS
  • TMSOMe
  • methoxy trimethylsilane
  • methoxytrimethyl silane
  • trimethyl methoxysilane
  • Methoxytri(methyl)silane
  • Methanol, TMS derivative
  • Methoxytrimethylsilane, 99%
  • Poly(dimethylsiloxane), viscosity: 500mm2/s

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
104.23 g/molcalc.
Exact mass
104.0657 Dacalc.
LogP (octanol/water)
1.47calc.
Topological polar surface area
9.23 Ųcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
1calc.
Rotatable bonds
1calc.
Heavy atoms
6calc.
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.
  • H319Causes serious eye irritation.
Precautionary statements (14)
  • 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.
  • P264 + P265Wash skin thoroughly after handling. Do not touch eyes.
  • P280Wear protective gloves, protective clothing, eye protection and face protection.
  • P303 + P361 + P353If on skin (or hair): Take off immediately all contaminated clothing. Rinse skin with water or shower.
  • P305 + P351 + P338If in eyes: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
  • P337 + P317If eye irritation persists: Get medical help.
  • P370 + P378In case of fire: Use appropriate media to extinguish.
  • P403 + P235Store in a well-ventilated place. Keep cool.
  • 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

Methoxytrimethylsilane suppliers

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

All 8 suppliers
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Suppliers marked Unclaimed profile have not claimed their profile yet. They are not verified by CompoundList, their offers are price on request and details may have changed, so please confirm them with the supplier. Company representatives can claim a profile with a business email on the company's own website domain. Our team verifies each claim and sends the result by email.

Where suppliers are based

8 suppliers in 4 countries

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Methoxytrimethylsilane price

Indicative price range per kg from live supplier offers

No published prices right now

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Uses and applications

What the substance is used for, by industry and function

Applications are not documented for this substance yet. Suppliers often describe uses on their product pages, linked in the suppliers list above.

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 Methoxytrimethylsilane 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 Methoxytrimethylsilane is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

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

What is Methoxytrimethylsilane?

Methoxytrimethylsilane is a chemical substance with the molecular formula C4H12OSi and a molar mass of 104.23 g/mol. Its CAS registry number is 1825-61-2. The IUPAC name is methoxy(trimethyl)silane.

What is the CAS number of Methoxytrimethylsilane?

The CAS registry number of Methoxytrimethylsilane is 1825-61-2.

What is the molecular formula and weight of Methoxytrimethylsilane?

The molecular formula of Methoxytrimethylsilane is C4H12OSi and its molar mass is 104.23 g/mol.

Is Methoxytrimethylsilane hazardous?

Methoxytrimethylsilane carries the GHS signal word "Danger". Main hazards: highly flammable liquid and vapour, causes serious eye irritation. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of Methoxytrimethylsilane?

Methoxytrimethylsilane 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 Methoxytrimethylsilane?

CompoundList lists 8 suppliers of Methoxytrimethylsilane in China, United States, Germany and Japan. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

What is the price of Methoxytrimethylsilane?

Suppliers quote Methoxytrimethylsilane 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 Methoxytrimethylsilane

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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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