Frequently Asked Questions
A: Here are the three third parties, they offer testing services, and we send our sample to them before
Directly From Factory
Siloxanes & Silanes
Monomers · Cyclic Siloxanes · Functional Silazanes
Explore Lyson's range of silicone intermediates — monomers, cyclic siloxanes, and functional silazanes produced directly from our synthesis facility. These are the core building blocks used by global manufacturers to formulate silicone fluids, elastomers, resins, and specialty coatings.
We maintain a 2:1 Monomer-to-Intermediate ratio for consistent upstream supply, with key products fully REACH Registered for seamless European market compliance.
Packaging Options: Steel drums or Intermediate Bulk Containers (IBCs). European door-to-door DDP delivery available.
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Key REACH-Registered Products
D4
Octamethylcyclotetrasiloxane
REACH Registered
D5
Decamethylcyclopentasiloxane
REACH Registered
HMDZ
Hexamethyldisilazane
REACH Registered
TMDSO
Tetramethyldisiloxane
REACH Registered
HMDSO
Hexamethyldisiloxane
REACH Registered
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HPTSO
Heptamethyltrisiloxane
REACH Registered
Click to view full details →
Product Range
Product Categories
Three distinct families covering the full organosilicon intermediate spectrum
2.1 — Monomers
Foundational methyl chlorosilane precursors for controlling cross-linking density and viscosity profiles in silicone polymers
| Product Name | Code | CAS Number | REACH Status |
|---|---|---|---|
| Methyltrichlorosilane | M1 | 75-79-6 | Contact for Status |
| Dimethyldichlorosilane | M2 | 75-78-5 | Contact for Status |
| Trimethylchlorosilane | M3 | 75-77-4 | Contact for Status |
2.2 — Cyclic Siloxanes
Used in ring-opening polymerization (ROP) to produce high-molecular-weight elastomers and specialty silicone fluids
| Product Name | Code | CAS Number | REACH Status |
|---|---|---|---|
| Hexamethylcyclotrisiloxane | D3 | 541-05-9 | Contact for Status |
| Octamethylcyclotetrasiloxane | D4 | 556-67-2 | REACH Registered |
| Decamethylcyclopentasiloxane | D5 | 541-02-6 | REACH Registered |
| Dodecamethylcyclohexasiloxane | D6 | 540-97-6 | Contact for Status |
| Tetravinyl Tetramethyl Cyclotetrasiloxane | D4V | 2554-06-5 | Contact for Status |
2.3 — Functional Silazanes & Disiloxanes
Critical chain terminators and surface modification agents, isolated via precision "low boiler" distillation for exceptional purity
| Product Name | Code | CAS Number | REACH Status |
|---|---|---|---|
| Hexamethyldisilazane | HMDZ | 999-97-3 | REACH Registered |
| Tetramethyldisiloxane | TMDSO | 3277-26-7 | REACH Registered |
| Heptamethyltrisiloxane | HPTSO | 1873-88-7 | REACH Registered |
| Hexamethyldisiloxane | HMDSO | 107-46-0 | REACH Registered |
| Divinyl Tetramethyl Disiloxane | DVTMDSO | 2627-95-4 | Contact for Status |
Applications
Industrial Applications
Our intermediates serve precision manufacturing across three high-growth industries
Electronics & Semiconductors
- CVD precursors for dielectric coatings
- Surface passivation and hydrophobic treatment
- Photoresist stripping aids
- Encapsulant and conformal coating intermediates
New Energy & EV
- Silicon anode surface modification for Li-ion batteries
- PV module encapsulant raw materials
- Fuel cell membrane surface treatment
- Thermal interface material intermediates
Medical & Pharmaceutical
- Medical-grade silicone rubber synthesis
- Hydrophobic coating for vials and syringes
- Personal care silicone base materials
- Drug delivery encapsulation intermediates
About Us
Lyson, established in 2018, is a subsidiary of a parent company that has been in business for over 30 years. The parent company also has subsidiaries in Tokyo and Frankfurt. This gives us access to a global network of silicone-based raw material suppliers and customers.
why Us?
At Lyson, we offer more than just export service. We offer value-added trade services that include:
- Free sourcing service until you are satisfied with the quality, quantity, cost, timing, and packaging of your order
- Up-to-date market insights and advice to help you make informed decisions and avoid price fluctuations
- Quality guarantee and testing before purchasing to ensure you get the best products for your needs
- Fast and accurate sourcing thanks to our 30 years of local supply chain network and experience
Contact Us
Call Us
Tel:+86 21 3363 2226
Lyson Chem-Materials Shanghai Company
sales@lysonchem-materials.com
Room 421, No. 62 – 421, Hongcao Road, Xuhui, Shanghai,
China 200233
Tel:+49 (0) 6102 8837308
GW United Chemicals GmbH
info@gwunitechem.com
Max-Holder-19, Frankfurt,
Germany
Tel:+81 3 3436 2520
GW Chemicals Nippon
info@gwchem.jp
東京都港区虎ノ門3丁目22番14号 エミタス虎ノ門ビル, “Isenburg” , “1201”
Japan
Tel:+1 347 9400534
GW United Chemicals USA Inc.
info@gwunitedchem.com
165 Broadway, 23rd Floor, New York, 10006
United States of America
Lyson Chem Product List
| PRODUCT | CAS No. |
|---|---|
| Dimethyl Silicone Fluid 0.65cst 1cs 1.5cst 2cst 3cst | 107-46-0, 107-51-7, 141-62-8, 141-63-9, 63148-62-9 |
| Dimethyl Silicone Fluid 20cst 50cst 100cst 350cst 500cst 1000cst | 63148-62-9 |
| Dimethyl Silicone Fluid 10000cst 12500cst 60000cst | 63148-62-9 |
| Hydroxy Silicone Fluid | 70131-67-8 |
| OH Polymer | 70131-67-8 |
| Vinyl Silicone Fluid | 63148-62-9 |
| Methyl Hydrogen Silicone Fluid | 63148-57-2 |
| Hydrogen-terminated Silicone Fluid | 70900-21-9 |
| Amino Silicone Fluid | 63148-62-0 |
| Methyl Phenyl Silicone Fluid | 63148-52-7, 63148-58-3 |
| Phenyl Vinyl Silicone Fluid | 225927-21-9 |
| Phenyl Hydrogen Silicone Fluid | 17875-55-7 |
| Methyl Fluoro Silicone Fluid | 63148-56-1 |
| Diffusion Pump Silicone Fluid | 3982-82-9, 3390-61-2 |
| Stearoyl Benzoyl Methane - SBM | 58446-52-9 |
| Hexamethyldisiloxane | HMDSO | 107-46-0 |
| heptamethyltrisiloxane | HPTSO | 1873-88-7 |
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