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Silanes and silicones

Diethoxydimethylsilane

Also known as Dimethyldiethoxysilane, Diethoxy(dimethyl)silane, Silane, diethoxydimethyl-

CAS 78-62-6Formula C6H16O2SiMolar mass 148.28 g/molEC 201-127-6
GHS signal word: Danger. Pictograms: Flammable, Harmful or irritant 22 suppliers listed
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Diethoxydimethylsilane chemical structure, C6H16O2Si, CAS 78-62-6
2D chemical structure

Key facts

What buyers check first

All properties
Physical form
Liquid
Boiling point
114 °C
Density
0.86 @25 °C
HS code
293190
Category
Silanes and silicones
UN number
UN 2380
Illustrative photo, a closed 1000 litre IBC tote in a warehouse
Typical packagingIllustrative packaging image, not the actual product

What is Diethoxydimethylsilane?

Plain description, key identifiers and synonyms

Dimethyldiethoxysilane appears as a colorless liquid. Less dense than water and insoluble in water. Vapors heavier than air.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
diethoxy(dimethyl)silane
CAS number
78-62-6 CAS number cross-checkedOther or deprecated CAS: 118529-50-3
EC number
201-127-6
Molecular formula
C6H16O2Si
UNII
I3931J3ZJ2
MDL number
MFCD00009068
InChIKey
YYLGKUPAFFKGRQ-UHFFFAOYSA-N
InChI
InChI=1S/C6H16O2Si/c1-5-7-9(3,4)8-6-2/h5-6H2,1-4H3
SMILES (canonical and isomeric)
CCO[Si](C)(C)OCC

Synonyms

  • Dimethyldiethoxysilane
  • Diethoxy(dimethyl)silane
  • Silane, diethoxydimethyl-
  • Dimethyl-diethoxysilan
  • dimethyl diethoxy silane
  • Silane,diethoxy,dimethyl
  • 4-04-00-04101 (Beilstein Handbook Reference)
  • UN 2380
  • SZ 6078
  • Dimethylsilicondiethoxide
  • Bis(ethoxy)dimethylsilane
  • KBE 22
  • diethoxyldimethylsilane
  • Diethoxydi(methyl)silane
  • Diethoxydimethylsilane, 97%
  • Diethoxydimethylsilane, purum, >=97.0% (GC)
  • Dimethyldiethoxysilane [UN2380] [Flammable liquid]

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.
Boiling point
114 °Cexp.
Density
0.86 @25 °Cexp.
Vapour pressure
10 [mm Hg] @13.3 °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
148.28 g/molcalc.
Exact mass
148.092 Dacalc.
LogP (octanol/water)
1.76calc.
Topological polar surface area
18.46 Ųcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
2calc.
Rotatable bonds
4calc.
Heavy atoms
9calc.
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.
  • H315Causes skin irritation.
  • H319Causes serious eye irritation.
  • H332Harmful if inhaled.
  • H335May cause respiratory irritation.
Precautionary statements (26)
  • 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.
  • P317Get medical help.
  • 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 2380
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

Diethoxydimethylsilane suppliers

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

All 22 suppliers
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Where suppliers are based

22 suppliers in 2 countries

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Diethoxydimethylsilane 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

  • Viscosity modifier

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

Frequently asked questions

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

What is Diethoxydimethylsilane?

Dimethyldiethoxysilane appears as a colorless liquid. Less dense than water and insoluble in water. Vapors heavier than air.

Is Diethoxydimethylsilane hazardous?

Diethoxydimethylsilane 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.

Guides for buyers

Practical guides that help when you source, ship or handle Diethoxydimethylsilane

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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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