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POLYDIMETHYL SILOXANES (PDMS) CAS Number: 63148-62-9

CAS No. 63148-62-9

Synonym Dimethyl Polysiloxan

Fomular CH3［(CH3)2SIO］n-SI(CH3)3

Flashing Point(°C) ≥290

Melting Point(°C) not determind

Boiling Point Not determined

Vapour Pressure (25°C) Not determined

Specific Gravity (g/CM3) (25°C) 0.965 – 0.973

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;

Specification:

Main Physical Index 
NO ITEM NO Viscosity (25°C)mm²/s Flash point (°C≥ Specific Gravity (25°C), g/cm² Index of refraction Volatility (150°C, 3h),％≤
1 BY201-5 5±1 115 0.92~0.93 1.3800~1.39 —
2 BY201-10 10±1 150 0.931~0.939 1.3900~1.4010 —
3 BY201-20 20±2 200 0.946~0.955 1.3950~1.4050 —
4 BY201-50 50±5 260 0.956~0.964 1.4000~1.4100 —
5 BY201-100 100±5 290 0.961~0.969 1.4000~1.4100 1.5
6 BY201-300 300±20 290 0.961~0.969 1.4000~1.4100 1.5
7 BY201-350 350±25 290 0.965~0.973 1.4000~1.4100 1.5
8 BY201-500 500±25 295 0.966~0.974 1.4000~1.4100 1.5
9 BY201-1000 1000±50 300 0.967~0.975 1.4000~1.4100 1.5
10 BY201-5000 5000±250 310 0.967~0.975 1.4010~1.4120 1.5
11 BY201-10000 10000±500 310 0.967~0.975 1.4010~1.4120 1.5
12 BY201-100000 100000±5000 315 0.967~0.975 1.4010~1.4120 1
13 BY201-125000 125000±5100 315 0.967~0.975 1.4010~1.4120 1

HS code: 3910000000

CAS No.: 63148-62-9

EINECS: 203-492-7

● Packages:

200kg/iron drum,16T in 20’FCL 

1000kg/IBC, 20T in 20’FCL

Packing 1Packing 2
Packing 3Packing 4

Features

Chemical Name: Polydimethylsiloxane

Abbreviations: PDMS, Polydimethyl Silicone Oil

Appearance: Colorless, clear liquid (viscosity varies from very low to high depending on molecular weight)

Odor: Mild, characteristic silicone odor

Viscosity: Wide range (from ~5 cSt to >1,000,000 cSt)

Solubility: Insoluble in water; soluble in organic solvents

Thermal Stability: Excellent; stable over a wide temperature range (-50°C to 200°C or higher for high molecular weight grades)

Chemical Stability: Resistant to oxidation, UV light, and most chemicals

Non-Toxic & Non-Flammable (most grades): Safe for industrial and personal care applications

Handling

1. Avoid breathing vapors, mist, or aerosols.

2. Avoid contact with skin, eyes, and clothing.

3. Use in well-ventilated areas or with local exhaust ventilation.

4. Wear appropriate PPE: chemical-resistant gloves, safety goggles/face shield, and protective clothing.

5. Keep away from heat, sparks, open flames, and other ignition sources.

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 release into the environment.

Storage

1. Store in a cool, dry, well-ventilated area.

2. Keep container tightly closed when not in use.

3. Protect from heat, direct sunlight, and ignition sources.

4. Store away from strong oxidizing agents and reactive chemicals.

5. Keep in original containers or approved storage tanks suitable for silicone oils.

6. Follow local regulations for storage of flammable or reactive liquids if applicable.

APPLICATION SCENARIOS

1. Lubricants & Release Agents

Used as:

Industrial lubricants

Mold release agents (rubber, plastic, die casting)

Anti-stick coatings

Provides low friction, thermal stability, and long service life.

2. Defoaming & Foam Control

Widely applied in:

Textile processing

Chemical manufacturing

Wastewater treatment

Fermentation systems

Coatings and inks

Its low surface tension enables rapid foam collapse and long-lasting defoaming efficiency.

3. Electrical & Electronic Insulation

Used in:

Transformer oils (special grades)

Dielectric fluids

Electronic encapsulation systems

Heat-transfer fluids

Offers high dielectric strength and oxidation resistance.

4. Cosmetics & Personal Care

Extensively used in:

Skin care formulations

Hair conditioners

Antiperspirants

Makeup products

Provides smooth spreadability, silky feel, and moisture barrier performance.

5. Heat Transfer & Thermal Fluids

Applied in:

High-temperature bath fluids

Thermal control systems

Laboratory heating/cooling systems

Maintains stability over a broad temperature range.

6. Construction & Surface Treatment

Used for:

Water-repellent additives

Concrete and stone protection

Polishing agents

Improves hydrophobicity and surface durability.

7. Medical & Pharmaceutical (Special Grades)

Applied in:

Medical lubricants

Antifoam agents

Topical protectants

Biocompatible grades meet pharmaceutical standards.

POLYDIMETHYL SILOXANES 1
POLYDIMETHYL SILOXANES 2

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.

demo176-map

  • Vietnam

  • India

  • Belgium

  • USA

  • Czech Republic

  • Mexico

  • Colombia

  • Singapore

  • Ecuador

  • Peru

  • Russia

  • Turkey

  • Costa Rica

  • Chile

  • Indonesia

  • Pakistan

Send Inquiry

We are committed to providing you with the best quality service and look forward to communicating with you to solve problems together and bring you a better experience.