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Hexamethyldisiloxane (HMDSO) CAS 107-46-0
Overview
Hexamethyldisiloxane (HMDSO), commonly referred to as MM in the silicone industry, is a clear, colorless, and odorless linear siloxane liquid. Distinctive for its extremely low surface tension, excellent spreadability, and high volatility without cooling effects, HMDSO is a highly sought-after ingredient in the premium personal care sector. Industrially, it serves as the ultimate end-capping agent to precisely control the molecular weight of silicone polymers.
Product Description
Hexamethyldisiloxane (HMDSO), commonly referred to as MM in the silicone industry, is a clear, colorless, and odorless linear siloxane liquid. Distinctive for its extremely low surface tension, excellent spreadability, and high volatility without cooling effects, HMDSO is a highly sought-after ingredient in the premium personal care sector. Industrially, it serves as the ultimate end-capping agent to precisely control the molecular weight of silicone polymers.
At Shandong Yinglang Chemical Co., Ltd., established in 2016, we supply bulk volumes of Ultra-High Purity HMDSO (≥ 99.5%) to multinational cosmetic brands and advanced silicone rubber manufacturers. Operating strictly under Class 3 Dangerous Goods protocols, our HMDSO is packaged in tightly sealed, anti-static environments to ensure safe global transit, delivering pristine purity for both skin-contact formulations and high-tech applications.
For sensitive cosmetic formulations and electronic applications, maintaining ultra-low moisture and high assay is critical. Typical specifications:
| Purity (HMDSO) | ≥ 99.5% |
|---|---|
| Moisture / Water | ≤ 0.02% |
| Acidity (as HCl) | ≤ 0.001% |
| Color (Pt-Co) | ≤ 10 |
| Refractive Index (at 20°C) | 1.376 - 1.378 |
- Premium Cosmetics: The premier volatile silicone fluid. Used as a safe replacement for restricted cyclomethicones (D4/D5) in antiperspirants, makeup removers, and hair serums to provide a silky, non-greasy feel.
- Polymer End-Capping: Acts as the primary "chain stopper" in the synthesis of silicone oils and rubbers, allowing precise control over polymer viscosity.
- Medical & Healthcare: Formulated into liquid bandages and adhesive removers. Evaporates without stinging, ensuring painless application.
- Precision Cleaning: Serves as an ozone-safe cleaning solvent for optical lenses and electronics.
As the European Union (REACH) strictly limits the use of cyclic siloxanes like D4 and D5 in wash-off cosmetics due to environmental accumulation concerns, global cosmetic OEMs are urgently seeking safe alternatives. HMDSO (MM) offers the perfect drop-in solution. It mimics the rapid evaporation and sensory profile of D5 perfectly, but as a linear siloxane, it easily clears global environmental regulations, ensuring your premium skincare lines remain compliant and marketable worldwide.
Because HMDSO is highly volatile and flammable, our packaging ensures absolute safety and vapor containment during ocean transit:
- 150 KG / 160 KG Heavy-duty UN-approved Steel Drums, tightly sealed, internally clean, and purged with dry Nitrogen.
- ISO TANKS (18 MT) available for massive industrial procurement by silicone gigafactories.
- Transport Classification: Classified as Class 3 (Flammable Liquid).
- UN Number: UN 1993 | Packing Group: II
- Handling Precautions: HIGHLY FLAMMABLE LIQUID AND VAPOR. Operators MUST handle strictly in well-ventilated, explosion-proof environments with proper grounding to prevent static discharge. Store in a cool, dark DG facility.
Contact us today for the latest FOB/CIF pricing, detailed COA, and specialized Class 3 DG shipping estimates for your cosmetic or polymer facility.
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PACKING AND DELIVERY
Packing and delivery
We offer secure and compliant packaging for a wide range of chemical products, from laboratory bottles (100 mL, 250 mL, 500 mL) to customized bulk containers. All shipments follow international hazardous goods standards and include complete documentation such as COA and SDS. With reliable global logistics partners, we ensure safe, fast, and efficient delivery by air, sea, or land according to customer needs.
FAQ
Q1: What documents and certifications do you provide?
A Standard shipment includes COA (Certificate of Analysis) and MSDS (SDS). We also provide ISO 9001 certification and support third-party inspections like SGS or BV upon request.
Q2: Do you provide custom synthesis or formulation services?
A Yes. If you have specific purity requirements or a unique formulation, our R&D team can provide custom synthesis and adjust the stabilizers/inhibitors to meet your technical specifications.
Q3: What are your terms of payment?
A
For Orders ≤ $1,000: 100% in advance.
For Orders > $1,000: 30% T/T in advance, and the balance before shipment or against the copy of B/L. Irrevocable L/C at sight is also acceptable for bulk orders.
Q4: How long is your price valid?
A Chemical prices fluctuate due to the changes in raw material costs and exchange rates. Please contact our sales team for the latest real-time quotation.
Q5: What packaging and shipping ports are available?
A
We normally ship from Qingdao, Shanghai, or Ningbo.
Standard packaging includes 200kg Drums or 1000kg IBC Totes. We ensure strict safety compliance for both general and hazardous chemical cargoes.
Q6: It's my first time importing chemicals — can you help?
A Absolutely. Importing chemicals requires specific documentation. Our experienced logistics team will assist you with the entire process, including handling customs clearance documents and arranging the most suitable shipping method.