Wechat Code
Hexamethyldisiloxane (MM) CAS Number: 107-46-0
CAS No. 107-46-0
Synonyms MM, HMDO, POLYDIMETHYLSILOXANE
Molecular Formula C6H18OSi
Molecular Weight 162.2
Boiling Point 100℃
Flash Point -1℃
Density 0.762/cm3 (25℃)
20+ years supplying history;
No claims;
Good and stable quality; Stable supplying;
SGS testing approved; EMTEK, SRICI tested; ISO:90012/ 2015 certified, AAA Credit certified;
Delivery Time: 15-20 days;
Audit acceptable;
Competitive price;
Bigbags Packing; On pallets; IBC packing;
| Testing Item | Standard |
| Assay (%) | 99.0 Min |
| Refractive Index (n 25D) | 1.3748 |
| Appearance | Colorless Transparent Liquid |
HS code: 2931900090
CAS No.: 107-46-0
UN No.: 1993
EINECS: 203-492-7
Hazardous Grade: 3
Packing Type: II
● Packages:
150 kgs iron drum coated with PVF.
Handling
1. Avoid breathing vapors or mist.
2. Avoid contact with skin, eyes, and clothing.
3. Use only in well-ventilated areas with appropriate exhaust ventilation.
4. Wear suitable PPE: chemical-resistant gloves, safety goggles/face shield, and protective clothing.
5. Flammable liquid — keep away from heat, sparks, open flames, and hot surfaces.
6. Ground and bond containers during transfer to prevent static discharge.
7. Do not eat, drink, or smoke while handling.
8. Wash thoroughly after handling.
9. Prevent spills and avoid environmental release.
Storage
1. Store in a cool, dry, well-ventilated place.
2. Keep container tightly closed when not in use.
3. Keep away from heat, ignition sources, and direct sunlight.
4. Store away from strong oxidizing agents.
5. Use approved flammable liquid storage areas and containers.
6. Ground storage tanks and transfer equipment.
7. Follow local regulations for storage of flammable liquids.
1. Molecular Weight Control in PDMS Production
MM is employed during the ring-opening polymerization of cyclic siloxanes (e.g., D4/D5) to:
Terminate polymer chains
Control viscosity and degree of polymerization
Define trimethylsiloxy end groups
Stabilize molecular weight distribution
This represents its principal industrial function.
2. Silicone Fluids Manufacturing
MM is used in the preparation of:
Low-viscosity silicone oils
Trimethylsiloxy-terminated PDMS fluids
Specialty linear siloxane intermediates
It ensures consistent end-group structure and enhances product stability.
3. Silicone Resins and Elastomer Systems
In resin and elastomer formulations, MM functions as:
End-blocking agent
Structural modifier
Crosslink density regulator
It improves processability and mechanical property control.
4. Specialty Solvent and Processing Aid
Due to its low viscosity, volatility, and chemical inertness, MM is applied as:
Reaction medium in organosilicon synthesis
Precision cleaning solvent
Carrier fluid in specialty formulations
OUR MARKET
Up till now we’ve developed and supplied to many countries and areas all over the world, with main markets in European countries (Germany, Italy, UK, Spain, Ukraine, Russia, Poland, etc.), USA, South America, Mid East, South-east Asia, Australia, etc. Also seeking more strategic partners and customers under mutual benefits and work through the whole purchasing chain.
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Vietnam
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India
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Belgium
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USA
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Czech Republic
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Mexico
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Colombia
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Singapore
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Ecuador
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Peru
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Russia
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Turkey
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Costa Rica
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Chile
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Indonesia
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Pakistan
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