Silicone Fluids & Oils Available — Bulk Only

Cyclohexasiloxane

CAS 540-97-6 · Formula C12H36O6Si6 · MW 444.92 g/mol

A volatile cyclic dimethylsiloxane used as a fast-spreading, residue-light carrier in personal care. Cyclic methylsiloxanes serve as fast-evaporating emollients, carriers, and solvents in personal-care formulations and as intermediates in silicone-polymer manufacture.

Safety Data Sheet
UN Number
UN 1325
Hazard Class
Class 4.1
HS Code
2931.90
At a Glance
Material Family
Silicone Fluids & Oils
Record Type
Pure compound
Primary Role
Solvency · Emolliency
Functional Roles
CYCLOTRISILOXANE
HAIR CONDITIONINGSKIN CONDITIONINGSKIN CONDITIONING - EMOLLIENTSOLVENT
Industries Served
Applications & Use Cases
  • Carrier solvent: Fast-evaporating, residue-light vehicle for actives and silicones
  • Emollient: Smooth, non-greasy skin and hair feel
  • Hair conditioning: Spreading and conditioning agent in hair care
  • Silicone intermediate: Building block for silicone polymers
Physical Properties
Physical Description
White solid; Crystals
Safety & Handling
Full SDS available on request

A grade-specific Safety Data Sheet (SDS) — with the complete hazard classification, handling precautions, and transport information — is supplied with every shipment and available on request. Confirm all safety and regulatory details against the SDS for your specific grade.

DOT / UN Transport Classification
DOT hazard class 4.1 placard
UN / DOT NumberUN 1325
Hazard Class / DivisionClass 4.1
Packing GroupII
Proper Shipping NameFlammable solid, organic, n.o.s.

Transport classification per the UN Model Regulations / 49 CFR 172.101 Hazardous Materials Table. Confirm against the grade-specific SDS (Section 14) before shipping.

HS / Tariff Classification
Harmonized System (HS) Code — 6-digit international heading
2931 . 90
Chapter 29
Organic chemicals
Heading 29.31
Internationally harmonized (WCO HS)
Subheading 2931.90
6-digit international code — national tariff line adds further digits
Chemical Identity
CAS Number
540-97-6
Molecular Formula
C12H36O6Si6
Molecular Weight
444.92 g/mol
IUPAC Name
2,2,4,4,6,6,8,8,10,10,12,12-dodecamethyl-1,3,5,7,9,11-hexaoxa-2,4,6,8,10,12-hexasilacyclododecane
INCI Name
CYCLOTRISILOXANE
PubChem CID
InChI Key
IUMSDRXLFWAGNT-UHFFFAOYSA-N
Synonyms & Trade Names
Cyclohexasiloxane, dodecamethyl- Cyclomethicone 6 XIAMETER PMX-0246 2,2,4,4,6,6,8,8,10,10,12,12-dodecamethyl-1,3,5,7,9,11-hexaoxa-2,4,6,8,10,12-hexasilacyclododecane Cyclohexasiloxane 2,2,4,4,6,6,8,8,10,10,12,12-Dodecamethylcyclohexasiloxane C12H36O6Si6 DC 246 fluid Simethicone Impurity 5 Dodecamethylhexacyclosiloxane dodecamethyl cyclohexasiloxane CYCLOMETHICONE 6 [USP-RS] CYCLOHEXASILOXANE, DODECAMETHYL DODECAMETHYLCYCLOHEXASILOXANE [HSDB]
Full Description

Cyclohexasiloxane is a volatile cyclic dimethylsiloxane. Cyclic methylsiloxanes serve as fast-evaporating emollients, carriers, and solvents in personal-care formulations and as intermediates in silicone-polymer manufacture. Supplied as a clear, low-viscosity fluid.

Frequently Asked Questions

What is cyclohexasiloxane used for?

Cyclohexasiloxane (CAS 541-05-9) is a volatile cyclic dimethylsiloxane used as a fast-evaporating carrier solvent and emollient in personal-care formulations, giving a smooth, non-greasy, residue-light feel. It also serves as a spreading and conditioning agent in hair care and as an intermediate in silicone-polymer manufacture.

What is the difference between cyclohexasiloxane and cyclopentasiloxane?

Both are volatile cyclic dimethylsiloxanes that differ in ring size: cyclohexasiloxane is the six-siloxane-unit ring while cyclopentasiloxane (D5) is the five-unit ring. The larger ring of cyclohexasiloxane gives it a higher boiling point and slightly slower evaporation. Formulators select between them based on desired volatility and feel.

Is cyclohexasiloxane water soluble?

No. Cyclohexasiloxane is a low-viscosity silicone fluid and is not water soluble; it is miscible with other silicones and many nonpolar/organic solvents, which is why it functions as a carrier for actives and silicones. See the product SDS for full solubility and handling data.

How does RawSource supply cyclohexasiloxane in bulk?

RawSource distributes cyclohexasiloxane as a clear, low-viscosity fluid in industrial quantities, classified under HS code 2931.90 (organo-silicon compounds). Packaging and lot size are confirmed per order, with a CoA and SDS provided. Request a bulk quote with your required quantity.

What is the cost of bulk cyclohexasiloxane?

Bulk pricing depends on packaging, order volume, and destination, so it is quoted per order rather than listed. Submit a bulk RFQ with your quantity and RawSource will return current pricing.

Disclaimer. Information on this page — including properties, identifiers, hazard, transport (DOT/UN) and tariff (HS) classifications, and applications — is provided for general reference and is compiled from authoritative public sources (e.g. PubChem/ECHA, 49 CFR 172.101, the Harmonized Tariff Schedule). Values are typical and are not a guaranteed specification; the Certificate of Analysis (CoA) for the lot purchased governs. Products are sold for industrial and professional use only. Nothing here is a medical, health, or efficacy claim or advice. Always consult the current Safety Data Sheet (SDS) before handling, storage, transport or disposal, and confirm regulatory status, classification and suitability for your application and jurisdiction. Hazard, transport and tariff classifications must be verified for your specific shipment. RawSource makes no warranty, express or implied, and assumes no liability for use of this information. Trademarks. Third-party trademarks and brand names are the property of their respective owners; any reference is nominative — used only to identify a comparable product — and does not imply affiliation with, sponsorship by, or endorsement by the trademark owner.