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Silanes and silicones

Phenyltriethoxysilane

Also known as Triethoxy(phenyl)silane, Triethoxyphenylsilane, Silane, triethoxyphenyl-

CAS 780-69-8Formula C12H20O3SiMolar mass 240.38 g/molEC 212-305-8
GHS signal word: Warning. Pictograms: Flammable, Harmful or irritant, Serious health hazard 26 suppliers listed
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Phenyltriethoxysilane chemical structure, C12H20O3Si, CAS 780-69-8
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
780-69-8
Formula
C12H20O3Si
Physical form
Liquid
Density
1.00 @ 20 °C
HS code
293190
Category
Silanes and silicones
Illustrative photo, closed blue steel drums of liquid in a chemical plant
Typical packagingIllustrative packaging image, not the actual product

What is Phenyltriethoxysilane?

Plain description, key identifiers and synonyms

Phenyltriethoxysilane is a chemical substance with the molecular formula C12H20O3Si and a molar mass of 240.38 g/mol. Its CAS registry number is 780-69-8. The IUPAC name is triethoxy(phenyl)silane.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
triethoxy(phenyl)silane
CAS number
780-69-8 CAS number cross-checkedOther or deprecated CAS: 124741-08-8
EC number
212-305-8
Molecular formula
C12H20O3Si
UNII
QI310T2X15
MDL number
MFCD00009065
InChIKey
JCVQKRGIASEUKR-UHFFFAOYSA-N
InChI
InChI=1S/C12H20O3Si/c1-4-13-16(14-5-2,15-6-3)12-10-8-7-9-11-12/h7-11H,4-6H2,1-3H3
SMILES (canonical and isomeric)
CCO[Si](C1=CC=CC=C1)(OCC)OCC

Synonyms

  • Triethoxy(phenyl)silane
  • Triethoxyphenylsilane
  • Silane, triethoxyphenyl-
  • Benzeneorthosiliconic acid, triethyl ester
  • Benzene, (triethoxysilyl)-
  • Triethoxyfenylsilan
  • Silane, phenyltriethoxy-
  • Tri(ethoxo)(phenyl)silane
  • phenyltri(ethoxy)silane
  • triethoxy-phenyl-silane
  • Silane, phenyltriethoxy-,
  • Triethoxyphenylsilane, 98%
  • Phenyltriethoxysilane, ptes
  • Triethoxyphenylsilane, deposition grade, >=98%
  • Phenyltriethoxysilane, (Triethoxysilyl)benzene, Benzene, (triethoxysilyl)-, Benzeneorthosiliconic acid, triethyl ester

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.
Density
1.00 @ 20 °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
240.38 g/molcalc.
Exact mass
240.1182 Dacalc.
LogP (octanol/water)
1.94calc.
Topological polar surface area
27.69 Ųcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
3calc.
Rotatable bonds
7calc.
Heavy atoms
16calc.
Rings
1calc.
Aromatic rings
1calc.
Fraction sp3 carbons
0.5calc.
Formal charge
0calc.
Stereocentres
0calc.
Lipinski rule of five
Passes (0 violations)calc.

Calculated for screening. Confirm critical figures with the supplier.

Murcko scaffold

The ring system that remains when every side chain is removed

Murcko scaffold of this chemical, c1ccccc1

c1ccccc1

1 ring, 6 atoms, the Benzene ring system.

485,677 other chemicals share this scaffold

Safety and hazards

GHS classification summary, not a safety data sheet

GHS signal word
Warning
GHS02: Flammable
Flammable
GHS07: Harmful or irritant
Harmful or irritant
GHS08: Serious health hazard
Serious health hazard

Hazard statements

  • H226Flammable liquid and vapour.
  • H315Causes skin irritation.
  • H373May cause damage to organs through prolonged or repeated exposure.
  • H412Harmful to aquatic life with long lasting effects.
Precautionary statements (19)
  • 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.
  • P260Do not breathe dust, fume, gas, mist, vapours or spray.
  • P264Wash skin thoroughly after handling.
  • P273Avoid release to the environment.
  • 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.
  • 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.
  • P362 + P364Take off contaminated clothing. And wash it before reuse.
  • 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

Phenyltriethoxysilane suppliers

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All 26 suppliers
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Where suppliers are based

26 suppliers in 3 countries

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Phenyltriethoxysilane 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.

Functional uses

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

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

Frequently asked questions

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

What is Phenyltriethoxysilane?

Phenyltriethoxysilane is a chemical substance with the molecular formula C12H20O3Si and a molar mass of 240.38 g/mol. Its CAS registry number is 780-69-8. The IUPAC name is triethoxy(phenyl)silane.

What is the CAS number of Phenyltriethoxysilane?

The CAS registry number of Phenyltriethoxysilane is 780-69-8. Other or deprecated CAS numbers: 124741-08-8.

What is the molecular formula and weight of Phenyltriethoxysilane?

The molecular formula of Phenyltriethoxysilane is C12H20O3Si and its molar mass is 240.38 g/mol.

What is Phenyltriethoxysilane used for?

Industrial uses: Intermediate.

Is Phenyltriethoxysilane hazardous?

Phenyltriethoxysilane carries the GHS signal word "Warning". Main hazards: flammable liquid and vapour, causes skin irritation, may cause damage to organs through prolonged or repeated exposure. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of Phenyltriethoxysilane?

Phenyltriethoxysilane 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 Phenyltriethoxysilane?

CompoundList lists 26 suppliers of Phenyltriethoxysilane in China, United States and Netherlands. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

What is the price of Phenyltriethoxysilane?

Suppliers quote Phenyltriethoxysilane 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 Phenyltriethoxysilane

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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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