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Oxides and peroxides

Cyclotetrasiloxane

Also known as 1,3,5,7,2,4,6,8-tetroxatetrasilocane, 1,3,5,7,2,4,6,8-tetroxatetrasilicocane, 1,3,5,7,2,4,6,8-tetraoxatetrasilocane

CAS 293-51-6Formula H8O4Si4Molar mass 184.40 g/mol
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Cyclotetrasiloxane chemical structure, H8O4Si4, CAS 293-51-6
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
293-51-6
Formula
H8O4Si4
Molar mass
184.40 g/mol
HS code
281129
Category
Oxides and peroxides

What is Cyclotetrasiloxane?

Plain description, key identifiers and synonyms

Cyclotetrasiloxane is a cyclosiloxane.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
1,3,5,7,2,4,6,8-tetraoxatetrasilocane
CAS number
293-51-6 CAS number cross-checked
Molecular formula
H8O4Si4
InChIKey
DDJSWKLBKSLAAZ-UHFFFAOYSA-N
InChI
InChI=1S/H8O4Si4/c1-5-2-7-4-8-3-6-1/h5-8H2
SMILES (canonical and isomeric)
O1[SiH2]O[SiH2]O[SiH2]O[SiH2]1

Synonyms

  • 1,3,5,7,2,4,6,8-tetroxatetrasilocane
  • 1,3,5,7,2,4,6,8-tetroxatetrasilicocane
  • 1,3,5,7,2,4,6,8-tetraoxatetrasilocane

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

No measured properties are recorded for this substance yet. Ask suppliers for a technical data sheet.

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
184.40 g/molcalc.
Exact mass
183.95 Dacalc.
LogP (octanol/water)
-3.94calc.
Topological polar surface area
36.92 Ųcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
4calc.
Rotatable bonds
0calc.
Heavy atoms
8calc.
Rings
1calc.
Aromatic rings
0calc.
Fraction sp3 carbons
0calc.
Formal charge
0calc.
Stereocentres
0calc.

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, O1[SiH2]O[SiH2]O[SiH2]O[SiH2]1

O1[SiH2]O[SiH2]O[SiH2]O[SiH2]1

1 ring, 8 atoms. This chemical is the scaffold itself.

51 other chemicals share this scaffold

Safety and hazards

GHS classification summary, not a safety data sheet

No GHS hazard classification is recorded for this substance yet. That does not mean it is harmless.

GHS classification summary, not a safety data sheet (SDS). Classifications can differ by supplier, grade and concentration. Always check the supplier's SDS.

Cyclotetrasiloxane suppliers

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Cyclotetrasiloxane price

Indicative price range per kg from live supplier offers

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Suppliers quote this chemical on request. Send one free request and compare quotes side by side.

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Uses and applications

What the substance is used for, by industry and function

Use classes: Cosmetics.

Functional uses

  • Defoamer
  • Softener and conditioner
  • Solvent

Regulatory status

Inventories, regulations and trade controls that list this substance

No regulatory list memberships are recorded for this substance yet. Always check the rules of the importing and exporting country before trade.

HS code and trade data

Customs classification and reported world trade statistics

Global trade

World import and export statistics for the HS code Cyclotetrasiloxane is traded under.

HS 2811.29Indicative HS code

Inorganic oxygen compounds of non-metals, not elsewhere classified in subheading 2811.2

World exports in 2024
$580M
−11.6% vs 2023, imports $596M
2019 to 2024
Top exporters
  1. China21.4%
  2. Germany18.2%
  3. Poland17.5%
Top importers
  1. Germany14.9%
  2. United States13.6%
  3. France * partner reported9.2%

* Partner reported figures, a lower bound.

Reported customs values in USD, not prices.Full trade data

The HS code shown for Cyclotetrasiloxane is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

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

What is Cyclotetrasiloxane?

Cyclotetrasiloxane is a cyclosiloxane.

What is the CAS number of Cyclotetrasiloxane?

The CAS registry number of Cyclotetrasiloxane is 293-51-6.

What is the molecular formula and weight of Cyclotetrasiloxane?

The molecular formula of Cyclotetrasiloxane is H8O4Si4 and its molar mass is 184.40 g/mol.

What is Cyclotetrasiloxane used for?

Use classes: Cosmetics.

Is Cyclotetrasiloxane hazardous?

No GHS hazard classification for Cyclotetrasiloxane is recorded on CompoundList yet. That does not prove it is safe. Always read the supplier safety data sheet.

What is the HS code of Cyclotetrasiloxane?

Cyclotetrasiloxane is usually classified under HS code 281129 (II. INORGANIC ACIDS AND INORGANIC OXYGEN COMPOUNDS OF NON-METALS, other). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Cyclotetrasiloxane?

Post a free request on CompoundList and suppliers of Cyclotetrasiloxane will send you quotes. Your contact details stay private until you accept a quote.

What is the price of Cyclotetrasiloxane?

Suppliers quote Cyclotetrasiloxane 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 Cyclotetrasiloxane

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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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