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Impurities and reference standards

Decamethyltetrasiloxane

Also known as 1,1,1,3,3,5,5,7,7,7-Decamethyltetrasiloxane, Tetrasiloxane, decamethyl-, Tetrasiloxane, 1,1,1,3,3,5,5,7,7,7-decamethyl-

CAS 141-62-8Formula C10H30O3Si4Molar mass 310.69 g/molEC 205-491-7
GHS signal word: Warning. Pictograms: Flammable 8 suppliers listed
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Decamethyltetrasiloxane chemical structure, C10H30O3Si4, CAS 141-62-8
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
141-62-8
Formula
C10H30O3Si4
Molar mass
310.69 g/mol
Physical form
Liquid
HS code
293190
Category
Impurities and reference standards
Illustrative photo, 200 litre steel drums of liquid in a chemical plant
Typical packagingIllustrative packaging image, not the actual product

What is Decamethyltetrasiloxane?

Plain description, key identifiers and synonyms

Decamethyltetrasiloxane is a chemical substance with the molecular formula C10H30O3Si4 and a molar mass of 310.69 g/mol. Its CAS registry number is 141-62-8. The IUPAC name is [dimethyl(trimethylsilyloxy)silyl]oxy-dimethyl-trimethylsilyloxysilane.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
[dimethyl(trimethylsilyloxy)silyl]oxy-dimethyl-trimethylsilyloxysilane
CAS number
141-62-8 CAS number cross-checked
EC number
205-491-7
Molecular formula
C10H30O3Si4
UNII
C23WAL597T
MDL number
MFCD00008263
INCI name
TETRASILOXANE
InChIKey
YFCGDEUVHLPRCZ-UHFFFAOYSA-N
InChI
InChI=1S/C10H30O3Si4/c1-14(2,3)11-16(7,8)13-17(9,10)12-15(4,5)6/h1-10H3
SMILES (canonical and isomeric)
C[Si](C)(C)O[Si](C)(C)O[Si](C)(C)O[Si](C)(C)C

Synonyms

  • 1,1,1,3,3,5,5,7,7,7-Decamethyltetrasiloxane
  • Tetrasiloxane, decamethyl-
  • Tetrasiloxane, 1,1,1,3,3,5,5,7,7,7-decamethyl-
  • Tetrasiloxane, decamethyl
  • 1,1,1,3,3,5,5,7,7,7Decamethyltetrasiloxane
  • Tetrasiloxane, 1,1,1,3,3,5,5,7,7,7decamethyl
  • decamethyl tetrasiloxane
  • Simethicone Impurity 7
  • [(CH3)3SiOSi(CH3)2]2O
  • [dimethyl(trimethylsilyloxy)silyl]oxy-dimethyl-trimethylsilyloxysilane
  • Decamethyltetrasiloxane, 97%
  • Decamethyltetrasiloxane?
  • Yfcgdeuvhlprcz-uhfffaoysa-
  • [dimethyl(trimethylsilyloxy)silyl]oxy-dimethyl-trimethylsilyloxy-silane
  • 2,2,4,4,6,6,8,8-octamethyl-3,5,7-trioxa-2,4,6,8-tetrasilanonane
  • 1,1,1,3,3,5,5,7,7,7-Decamethyltetrasiloxane #
  • Decamethyltetrasiloxane Solution in Methanol, 1000ug/mL
  • Decamethyltetrasiloxane Solution in Methanol, 100ug/mL
  • (dimethyl-trimethylsilyloxysilyl)oxy-dimethyl-trimethylsilyloxysilane
  • 1,1,1,3,3,5,5,7,7,7-Decamethyltetrasiloxane, 1,1,3,3-Tetramethyl-1,3-bis(trimethylsiloxy)disiloxane

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.

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
310.69 g/molcalc.
Exact mass
310.1272 Dacalc.
LogP (octanol/water)
4.11calc.
Topological polar surface area
27.69 Ųcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
3calc.
Rotatable bonds
6calc.
Heavy atoms
17calc.
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
Warning
GHS02: Flammable
Flammable

Hazard statements

  • H226Flammable liquid and vapour.
  • H413May cause long lasting harmful effects to aquatic life.
Precautionary statements (12)
  • 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.
  • P273Avoid release to the environment.
  • P280Wear protective gloves, protective clothing, eye protection and face protection.
  • P303 + P361 + P353If on skin (or hair): Take off immediately all contaminated clothing. Rinse skin with water or shower.
  • 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

Decamethyltetrasiloxane suppliers

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

All 8 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

8 suppliers in 4 countries

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Decamethyltetrasiloxane 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: Other, Lubricating agent, Solvent, Intermediate, Diluent.

Consumer uses: Diluent.

Cosmetic ingredient, INCI name TETRASILOXANE(antifoaming)

Functional uses

  • Fragrance

Cosmetic functions

  • Antifoaming

Regulatory status

Inventories, regulations and trade controls that list this substance

Health and food

  • EU cosmetic ingredient inventory

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

Frequently asked questions

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

What is Decamethyltetrasiloxane?

Decamethyltetrasiloxane is a chemical substance with the molecular formula C10H30O3Si4 and a molar mass of 310.69 g/mol. Its CAS registry number is 141-62-8. The IUPAC name is [dimethyl(trimethylsilyloxy)silyl]oxy-dimethyl-trimethylsilyloxysilane.

What is the CAS number of Decamethyltetrasiloxane?

The CAS registry number of Decamethyltetrasiloxane is 141-62-8.

What is the molecular formula and weight of Decamethyltetrasiloxane?

The molecular formula of Decamethyltetrasiloxane is C10H30O3Si4 and its molar mass is 310.69 g/mol.

What is Decamethyltetrasiloxane used for?

Industrial uses: Other, Lubricating agent, Solvent, Intermediate, Diluent. Consumer uses: Diluent.

Is Decamethyltetrasiloxane hazardous?

Decamethyltetrasiloxane carries the GHS signal word "Warning". Main hazards: flammable liquid and vapour, may cause long lasting harmful effects to aquatic life. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of Decamethyltetrasiloxane?

Decamethyltetrasiloxane 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 Decamethyltetrasiloxane?

CompoundList lists 8 suppliers of Decamethyltetrasiloxane in China, United States, France 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 Decamethyltetrasiloxane?

Suppliers quote Decamethyltetrasiloxane 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 Decamethyltetrasiloxane

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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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