DISILOXANE- ▸ Silicone intermediate: chain stopper capping chain length in polydimethylsiloxane (PDMS) manufacture
- ▸ Volatile carrier: fast-evaporating spreading agent for antiperspirants, lotions and hair care
- ▸ Process solvent: low-residue cleaning solvent for electronics and coatings
- ▸ Mold release: carrier and release fluid for industrial molding
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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.
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Transport classification per the UN Model Regulations / 49 CFR 172.101 Hazardous Materials Table. Confirm against the grade-specific SDS (Section 14) before shipping.
Hexamethyldisiloxane (MM / HMDSO, CAS 107-46-0) is the shortest linear siloxane and the most volatile silicone fluid, at roughly 0.65 cSt. Sold in the trade as MM fluid, it serves as a chain stopper that caps chain length in polydimethylsiloxane (PDMS) manufacture, as a fast-evaporating carrier and spreading agent in personal care, and as a low-residue solvent in industrial and laboratory use. It is the volatile bottom of the silicone viscosity ladder; the next grades up are MDM (1 cSt) and MD2M (1.5 cSt). RawSource supplies MM fluid in bulk, sourced to spec, with CoA and SDS on every order.
Frequently Asked Questions
What is hexamethyldisiloxane used for?
Hexamethyldisiloxane (HMDSO/MM, CAS 107-46-0) is a low-viscosity, volatile silicone fluid used as a carrier solvent and viscosity reducer in silicone and personal-care formulations and as a building-block intermediate in the synthesis of silicone polymers. RawSource supplies it in bulk to silicone and formulation manufacturers.
Is hexamethyldisiloxane a silicone?
Yes. Hexamethyldisiloxane is the simplest siloxane, with a silicon-oxygen-silicon backbone and six methyl groups (C6H18OSi2). It is the basic structural unit underlying larger silicone fluids and polymers.
Is hexamethyldisiloxane water soluble?
No, hexamethyldisiloxane is a hydrophobic siloxane and is essentially insoluble in water; it is miscible with organic solvents and functions as a volatile carrier in non-aqueous systems. See the SDS and technical data sheet for solvency and volatility data.
How is hexamethyldisiloxane shipped, given its UN number?
Hexamethyldisiloxane is a flammable liquid assigned UN 1993, so it ships under DOT/IATA/IMDG hazardous-materials rules with appropriate packaging and labeling. RawSource supplies the SDS with each order; confirm packaging and mode requirements with your carrier.
How is bulk hexamethyldisiloxane packaged and quoted?
RawSource ships HMDSO as a bulk liquid in DOT-compliant drums and totes for silicone and personal-care accounts. Pricing depends on volume, packaging, and hazmat freight; submit an RFQ with your quantity and ship-to for a current quote with CoA and SDS.