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Silanes and silicones

Trichloromethylsilane

Also known as Methyltrichlorosilane, Methyl-trichlorsilan, Silane, trichloromethyl-

CAS 75-79-6Formula CH3Cl3SiMolar mass 149.48 g/molEC 200-902-6
GHS signal word: Danger. Pictograms: Flammable, Harmful or irritant 20 suppliers listed
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Trichloromethylsilane chemical structure, CH3Cl3Si, CAS 75-79-6
2D chemical structure

Key facts

What buyers check first

All properties
Appearance
Colorless liquid
Melting point
-90 °C
Boiling point
65.6 °C
Density
Relative density (water = 1): 1.3
Flash point
7.2 °C
HS code
293190
Category
Silanes and silicones
UN number
UN 1250
Illustrative photo, clear colourless liquid in a glass reagent bottle on a laboratory bench
Typical packagingIllustrative packaging image, not the actual product

What is Trichloromethylsilane?

Plain description, key identifiers and synonyms

Methyltrichlorosilane appears as a colorless fuming liquid with a pungent odor. Flash point 8 °F. Vapor and liquid may cause burns. Denser than water. Vapors are heavier than air.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
trichloro(methyl)silane
CAS number
75-79-6 CAS number cross-checked
EC number
200-902-6
Molecular formula
CH3Cl3Si
UNII
UIR5I18638
MDL number
MFCD00000481
InChIKey
JLUFWMXJHAVVNN-UHFFFAOYSA-N
InChI
InChI=1S/CH3Cl3Si/c1-5(2,3)4/h1H3
SMILES (canonical and isomeric)
C[Si](Cl)(Cl)Cl

Synonyms

  • Methyltrichlorosilane
  • Methyl-trichlorsilan
  • Silane, trichloromethyl-
  • Methylsilyl trichloride
  • Methylsilicochloroform
  • Trichloromethylsilicon
  • Monomethyltrichlorosilane
  • Silane, methyltrichloro-
  • Trichloro(methyl)silane
  • Trichlor-methylsilan
  • CH3SiCl3
  • 4-04-00-04212 (Beilstein Handbook Reference)
  • CH3Cl3Si
  • methyl trichlorosilane
  • trichloromethylsilan
  • MeSiCl3
  • SiCH3Cl3
  • Methyltrichlorosilane, 99%
  • Trichloro(methyl)silane,98%
  • Methyltrichlorosilane [UN1250] [Flammable liquid]
  • Methyltrichlorosilane, >=96%
  • LS 40
  • UN 1250
  • methyl trichlorosilane, Perhexa 25Z, CH3SiCl3, Methylsilichloroform, Silane, trichloromethyl-
  • Methyltrichlorosilane, deposition grade, >=98% (GC), >=99.99% (as metals)

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

Appearance
Colorless liquidexp.
Odour
ACRID ODOR, SHARP LIKE HYDROCHLORIC ACIDexp.
Melting point
-90 °Cexp.
Boiling point
65.6 °Cexp.
Density
Relative density (water = 1): 1.3exp.
Flash point
7.2 °Cexp.
Autoignition temperature
>404exp.
Solubility
Decomposes instantly in waterexp.
Vapour pressure
167 mm Hg at 25 °Cexp.

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
149.48 g/molcalc.
Exact mass
147.907 Dacalc.
LogP (octanol/water)
2.27calc.
Topological polar surface area
0 Ųcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
0calc.
Rotatable bonds
0calc.
Heavy atoms
5calc.
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
342WNFPA 704 rating

Hazard statements

  • H225Highly flammable liquid and vapour.
  • H315Causes skin irritation.
  • H319Causes serious eye irritation.
  • H335May cause respiratory irritation.
Precautionary statements (25)
  • 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.
  • P271Use only outdoors or in a well-ventilated area.
  • P280Wear protective gloves, protective clothing, eye protection and face protection.
  • 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).
  • 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.
UN number
UN 1250
Transport hazard class
3
Packing group
II

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

Trichloromethylsilane suppliers

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

All 20 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

20 suppliers in 6 countries

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Trichloromethylsilane 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

Intermediate for silicones.

Industrial uses: Intermediate.

Consumer uses: Adhesion/cohesion promoter.

How it is made

Controlled reaction of methyl chloride with silicon in the presence of a copper catalyst, followed by separation from other methylchlorosilanes by fractional distillation.

By Grignard reaction of silicon tetrachloride and methylmagnesium chloride.

Regulatory status

Inventories, regulations and trade controls that list this substance

Europe

  • EU harmonised classification (CLP Annex VI)
    Index no: 014-004-00-5

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

Frequently asked questions

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

What is Trichloromethylsilane?

Methyltrichlorosilane appears as a colorless fuming liquid with a pungent odor. Flash point 8 °F. Vapor and liquid may cause burns. Denser than water. Vapors are heavier than air.

What is the CAS number of Trichloromethylsilane?

The CAS registry number of Trichloromethylsilane is 75-79-6.

What is the molecular formula and weight of Trichloromethylsilane?

The molecular formula of Trichloromethylsilane is CH3Cl3Si and its molar mass is 149.48 g/mol.

What is Trichloromethylsilane used for?

Intermediate for silicones. Industrial uses: Intermediate. Consumer uses: Adhesion/cohesion promoter.

Is Trichloromethylsilane hazardous?

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

What is the HS code of Trichloromethylsilane?

Trichloromethylsilane 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 Trichloromethylsilane?

CompoundList lists 20 suppliers of Trichloromethylsilane in China, United States, Canada, Germany and 2 more. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

Where can I buy Trichloromethylsilane in India?

1 supplier in India list Trichloromethylsilane on CompoundList. Filter the suppliers list by country and send a request to compare prices, grades and delivery times.

What is the price of Trichloromethylsilane?

Suppliers quote Trichloromethylsilane 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 Trichloromethylsilane

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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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