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Silanes and silicones

Dodecyltrichlorosilane

Also known as Trichloro(dodecyl)silane, Trichlorododecylsilane, Silane, trichlorododecyl-

CAS 4484-72-4Formula C12H25Cl3SiMolar mass 303.78 g/molEC 224-769-9
GHS signal word: Danger. Pictograms: Corrosive 3 suppliers listed
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Dodecyltrichlorosilane chemical structure, C12H25Cl3Si, CAS 4484-72-4
2D chemical structure

Key facts

What buyers check first

All properties
Appearance
Colorless to yellow liquid
Boiling point
288 °C
Density
1.026 at 25 °C/25 °C
Flash point
>65.6
HS code
293190
Category
Silanes and silicones
UN number
UN 1771
Illustrative photo, 200 litre steel drums of liquid in a chemical plant
Typical packagingIllustrative packaging image, not the actual product

What is Dodecyltrichlorosilane?

Plain description, key identifiers and synonyms

Dodecyltrichlorosilane is a colorless to yellow liquid with a pungent odor. It will burn though it may take some effort to ignite. It is decomposed by moisture or water to hydrochloric acid with evolution of heat. It is corrosive to metals and tissue.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
trichloro(dodecyl)silane
CAS number
4484-72-4 CAS number cross-checked
EC number
224-769-9
Molecular formula
C12H25Cl3Si
UNII
08JI131K64
MDL number
MFCD00000483
InChIKey
BNCXNUWGWUZTCN-UHFFFAOYSA-N
InChI
InChI=1S/C12H25Cl3Si/c1-2-3-4-5-6-7-8-9-10-11-12-16(13,14)15/h2-12H2,1H3
SMILES (canonical and isomeric)
CCCCCCCCCCCC[Si](Cl)(Cl)Cl

Synonyms

  • Trichloro(dodecyl)silane
  • Trichlorododecylsilane
  • Silane, trichlorododecyl-
  • Dodecyl trichlorosilane
  • Silane, dodecyltrichloro-
  • Dodecyl trichlorosilane (DOT)
  • Dodeciltriclorosilano
  • Silane, dodecyltrichloro
  • Silane, trichlorododecyl
  • Dodeciltriclorosilano (Spanish)
  • n-Dodecyltrichlorosilane(Trichlorododecylsilane)
  • C12H25Cl3Si
  • n-Dodecyltrichlorosilane
  • Trichlorolaurylsilane
  • Trichlorododecylsilane, >=95.0% (GC)
  • Trichlorododecylsilane, Trichlorolaurylsilane
  • Dodecyltrichlorosilane [UN1771] [Corrosive]

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 to yellow liquidexp.
Odour
SHARP ODOR, LIKE HYDROCHLORIC ACID, PUNGENTexp.
Boiling point
288 °Cexp.
Density
1.026 at 25 °C/25 °Cexp.
Flash point
>65.6exp.

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
303.78 g/molcalc.
Exact mass
302.0791 Dacalc.
LogP (octanol/water)
6.56calc.
Topological polar surface area
0 Ųcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
0calc.
Rotatable bonds
11calc.
Heavy atoms
16calc.
Rings
0calc.
Aromatic rings
0calc.
Fraction sp3 carbons
1calc.
Formal charge
0calc.
Stereocentres
0calc.
Lipinski rule of five
Passes (1 violation)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
GHS05: Corrosive
Corrosive

Hazard statements

  • H314Causes severe skin burns and eye damage.
Precautionary statements (12)
  • P260Do not breathe dust, fume, gas, mist, vapours or spray.
  • P264Wash skin thoroughly after handling.
  • 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.
  • 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.
  • P405Store locked up.
  • P501Dispose of contents and container in accordance with local regulations.
UN number
UN 1771
Transport hazard class
8
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

Dodecyltrichlorosilane suppliers

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All 3 suppliers

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

3 suppliers in 2 countries

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Dodecyltrichlorosilane 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[Lewis RJ Sr, Hawley's Condensed Chemical Dictionary 15th ed Wiley (2007).

Functional uses

  • Adhesion/cohesion promoter
  • Wetting agent (non-aqueous)

How it is made

By Grignard reaction of silicon tetrachloride and dodecylmagnesium chloride.[Lewis RJ Sr, Hawley's Condensed Chemical Dictionary 15th ed Wiley (2007)

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

Frequently asked questions

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

What is Dodecyltrichlorosilane?

Dodecyltrichlorosilane is a colorless to yellow liquid with a pungent odor. It will burn though it may take some effort to ignite. It is decomposed by moisture or water to hydrochloric acid with evolution of heat. It is corrosive to metals and tissue.

What is the CAS number of Dodecyltrichlorosilane?

The CAS registry number of Dodecyltrichlorosilane is 4484-72-4.

What is the molecular formula and weight of Dodecyltrichlorosilane?

The molecular formula of Dodecyltrichlorosilane is C12H25Cl3Si and its molar mass is 303.78 g/mol.

What is Dodecyltrichlorosilane used for?

Intermediate for silicones[Lewis RJ Sr, Hawley's Condensed Chemical Dictionary 15th ed Wiley (2007).

Is Dodecyltrichlorosilane hazardous?

Dodecyltrichlorosilane carries the GHS signal word "Danger". Main hazards: 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 Dodecyltrichlorosilane?

Dodecyltrichlorosilane 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 Dodecyltrichlorosilane?

CompoundList lists 3 suppliers of Dodecyltrichlorosilane in China and United Kingdom. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

What is the price of Dodecyltrichlorosilane?

Suppliers quote Dodecyltrichlorosilane 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 Dodecyltrichlorosilane

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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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