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Silanes and silicones

Chlorodimethylsilane

Also known as dimethylsilyl chloride, dimethylmonochlorosilane, Chlorodimethylhydrosilane

CAS 1066-35-9Formula C2H7ClSiMolar mass 94.62 g/molEC 213-912-0
GHS signal word: Danger. Pictograms: Flammable, Corrosive, Acute toxicity (severe) 10 suppliers listed
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Chlorodimethylsilane chemical structure, C2H7ClSi, CAS 1066-35-9
2D chemical structure

Key facts

What buyers check first

All properties
Physical form
Liquid
Melting point
-111 °C
Boiling point
34.6 °C
Density
0.852 @25 °C
HS code
293190
Category
Silanes and silicones
UN number
UN 2924
Illustrative photo, closed blue steel drums of liquid in a chemical plant
Typical packagingIllustrative packaging image, not the actual product

What is Chlorodimethylsilane?

Plain description, key identifiers and synonyms

Dimethylchlorosilane appears as a colorless fuming liquid with a pungent, burning odor. Extremely corrosive to skin and respiratory tissues, both as a liquid and vapor. Vapors are heavier than air.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
chloro(dimethyl)silane
CAS number
1066-35-9 CAS number cross-checkedOther or deprecated CAS: 111431-67-5
EC number
213-912-0
Molecular formula
C2H7ClSi
InChIKey
YGHUUVGIRWMJGE-UHFFFAOYSA-N
InChI
InChI=1S/C2H7ClSi/c1-4(2)3/h4H,1-2H3
SMILES (canonical and isomeric)
C[SiH](C)Cl

Synonyms

  • dimethylsilyl chloride
  • dimethylmonochlorosilane
  • Chlorodimethylhydrosilane
  • Dimethylchlorohydrosilane
  • Dimethylchlorosilane
  • Dimethylhydrosilyl chloride
  • Silane, chlorodimethyl-
  • chloro(dimethyl)silane
  • Dimethylsilylchloride
  • chiorodimethylsilane
  • HSiMe2Cl
  • Me2SiHCl
  • SiHMe2Cl
  • chlorodimethyl silane
  • chlorodimethyl-silane

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.
Melting point
-111 °Cexp.
Boiling point
34.6 °Cexp.
Density
0.852 @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
94.62 g/molcalc.
Exact mass
94.0006 Dacalc.
LogP (octanol/water)
1.21calc.
Topological polar surface area
0 Ųcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
0calc.
Rotatable bonds
0calc.
Heavy atoms
4calc.
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
GHS05: Corrosive
Corrosive
GHS06: Acute toxicity (severe)
Acute toxicity (severe)

Hazard statements

  • H224Extremely flammable liquid and vapour.
  • H261In contact with water releases flammable gas.
  • H314Causes severe skin burns and eye damage.
  • H331Toxic if inhaled.
Precautionary statements (26)
  • P210Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. No smoking.
  • P231 + P232Handle and store contents under inert gas. Protect from moisture.
  • 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.
  • P260Do not breathe dust, fume, gas, mist, vapours or spray.
  • P261Avoid breathing dust, fume, gas, mist, vapours or spray.
  • P264Wash skin thoroughly after handling.
  • P271Use only outdoors or in a well-ventilated area.
  • P280Wear protective gloves, protective clothing, eye protection and face protection.
  • P301 + P330 + P331If swallowed: Rinse mouth. Do not induce vomiting.
  • P302 + P361 + P354If on skin: Take off immediately all contaminated clothing. Immediately rinse with water for several minutes.
  • 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 + P354 + P338If in eyes: Immediately rinse with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
  • P316Get emergency medical help immediately.
  • P321Specific treatment (see supplemental first aid instructions on the label).
  • P363Wash contaminated clothing before reuse.
  • P370 + P378In case of fire: Use appropriate media to extinguish.
  • P402 + P404Store in a dry place. Store in a closed container.
  • 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 2924

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

Chlorodimethylsilane suppliers

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

All 10 suppliers
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Where suppliers are based

10 suppliers in 3 countries

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Chlorodimethylsilane 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

Industrial uses: Monomers, 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 Chlorodimethylsilane 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 Chlorodimethylsilane is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

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

What is Chlorodimethylsilane?

Dimethylchlorosilane appears as a colorless fuming liquid with a pungent, burning odor. Extremely corrosive to skin and respiratory tissues, both as a liquid and vapor. Vapors are heavier than air.

What is the CAS number of Chlorodimethylsilane?

The CAS registry number of Chlorodimethylsilane is 1066-35-9. Other or deprecated CAS numbers: 111431-67-5.

What is the molecular formula and weight of Chlorodimethylsilane?

The molecular formula of Chlorodimethylsilane is C2H7ClSi and its molar mass is 94.62 g/mol.

What is Chlorodimethylsilane used for?

Industrial uses: Monomers, Intermediate.

Is Chlorodimethylsilane hazardous?

Chlorodimethylsilane carries the GHS signal word "Danger". Main hazards: extremely flammable liquid and vapour, in contact with water releases flammable gas, causes severe skin burns and eye damage. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of Chlorodimethylsilane?

Chlorodimethylsilane 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 Chlorodimethylsilane?

CompoundList lists 10 suppliers of Chlorodimethylsilane 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 Chlorodimethylsilane?

Suppliers quote Chlorodimethylsilane 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 Chlorodimethylsilane

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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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