Decamethylcyclopentasiloxane (D5)

CAS No. 541-02-6

Molecular Formula C10H30 O5Si5

Molecular Weight 370.77

Melting point -44°C

Boiling point 101℃

Flash point 76°(169°F)

Relative density(water=1) 0.950～0.960

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:

Testing Item	Standard
Content (%)	99% Min.
Refractive index: (n D25):	1.3960～1.3980
Chemical Solubility	Stable in closed containers under specified storage and handling conditions
Appearance:	Colorless odorless, transparent liquid

HS code: 2931900001

Returned VAT: 9%

CAS No.: 541-02-6

EINECS: 208-764-9

● Packages:

Handling

1. Avoid breathing vapors or mist.

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

3. Use in a well-ventilated area with appropriate local exhaust ventilation.

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

5. Keep away from heat, sparks, and open flames.

6. Ground and bond containers during transfer to prevent static discharge.

7. Avoid prolonged or repeated exposure.

8. 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. Protect from heat and direct sunlight.

4. Keep away from strong oxidizing agents.

5. Store in original containers or approved storage tanks.

6. Avoid contamination with acids, bases, and moisture.

7. Follow local regulations for storage of combustible liquids.

APPLICATION SCENARIOS

1. Silicone Polymer Production

D5 participates in ring-opening polymerization (ROP) to produce linear polydimethylsiloxane (PDMS).

Applications include:

Medium- to high-viscosity silicone fluids

Silicone elastomers

Silicone sealants

Silicone resins

It is often present in cyclic siloxane equilibrium mixtures used for viscosity adjustment and molecular weight control.

2. Personal Care & Cosmetic Applications (Major Direct Use)

Due to its volatility and sensory properties, D5 is widely used as:

Volatile carrier fluid

Spreading agent

Sensory modifier

Typical applications:

Antiperspirants and deodorants

Skin creams and lotions

Hair conditioners

Color cosmetics

Sunscreen formulations

Key performance characteristics:

Fast evaporation, smooth skin feel, non-greasy profile, improved spreadability.

3. Silicone-Based Industrial Fluids

D5 is used in specialty formulations requiring:

Low surface tension

Temporary lubrication

Uniform film formation

Controlled volatility

Applications include polishes, coatings, and specialty cleaning formulations.

4. Elastomers and Silicone Blends

In elastomer systems, D5 can function as:

Processing aid

Diluent during compounding

Viscosity modifier

It improves processability and material uniformity during manufacturing.

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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.

Vietnam
India
Belgium
USA
Czech Republic
Mexico
Colombia
Singapore
Ecuador
Peru
Russia
Turkey
Costa Rica
Chile
Indonesia
Pakistan

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