POLYDIMETHYLSILOXANE 350 DST

Polydimethylsiloxane 350 DST is a linear silicone fluid with a nominal viscosity of approximately 350 cSt, used as a lubricant, release agent, defoamer component, surface modifier, and conditioning fluid in industrial, cosmetic, pharmaceutical, and processing applications.
Polydimethylsiloxane 350 DST provides excellent thermal stability, low surface tension, chemical inertness, and consistent rheological behavior across a wide temperature range.
Polydimethylsiloxane 350 DST is valued for its clarity, low volatility, oxidation resistance, and compatibility with many organic and inorganic systems.

CAS Number: 63148-62-9
EC Number: 613-156-5
Molecular Formula: (C₂H₆OSi)ₙ
Molecular Weight: Not applicable (polymeric silicone; chain-length dependent)

Synonyms: Polydimethylsiloxane 350, PDMS 350 cSt, Silicone Oil 350 cSt, Dimethylpolysiloxane 350, Silicone Fluid 350, Linear PDMS Fluid, Polydimethylsiloxane 350 DST, PDMS 350 DST, Dimethyl Silicone Oil 350 DST, Silicone Oil 350 cSt DST, Polydimethylsiloxane 350 cSt, PDMS 350 cSt, Dimethylpolysiloxane 350 DST, Linear Polydimethylsiloxane 350 DST, Silicone Fluid 350 DST, Silicone Fluid 350 cSt, Dimethicone 350 cSt, Dimethicone 350, Silicone Oil Medium Viscosity 350, Medium Viscosity Silicone Oil 350, PDMS Medium Viscosity 350, Silicone Polymer 350 DST, Silicone Base Fluid 350 DST, Silicone Oil Technical Grade 350 DST, Industrial Silicone Oil 350 DST, Cosmetic Grade Silicone Oil 350 DST, Pharmaceutical Grade Silicone Oil 350 DST, Food Grade Silicone Oil 350 DST, PDMS Lubricant 350 DST, Silicone Lubricant Oil 350 DST, Silicone Release Oil 350 DST, Silicone Mold Release Fluid 350 DST, Silicone Antifoam Base Oil 350 DST, Silicone Defoamer Base 350 DST, Silicone Hydraulic Fluid 350 DST, Silicone Dielectric Fluid 350 DST, Silicone Heat Transfer Fluid 350 DST, Silicone Damping Fluid 350 DST, Silicone Shock Absorber Fluid 350 DST, Silicone Viscous Fluid 350 DST, Silicone Insulating Fluid 350 DST, Silicone Polysiloxane Fluid 350 DST, Silicone Linear Polymer Oil 350 DST, Silicone Spreading Oil 350 DST, Silicone Slip Agent 350 DST, Silicone Processing Aid 350 DST, Silicone Textile Softener Base 350 DST, Silicone Leather Finishing Oil 350 DST, Silicone Polishing Oil 350 DST, Silicone Gloss Enhancer 350 DST, Silicone Surface Modifier 350 DST, Silicone Hydrophobic Fluid 350 DST, Water-Repellent Silicone Oil 350 DST, Silicone Personal Care Fluid 350 DST, Silicone Hair Conditioning Fluid 350 DST, Silicone Skin Conditioning Fluid 350 DST, Silicone Emollient Oil 350 DST, Silicone Pharmaceutical Excipient 350 DST, Silicone Cosmetic Excipient 350 DST, Silicone Carrier Fluid 350 DST, Silicone Industrial Fluid 350 DST, Silicone Technical Fluid 350 DST

APPLICATIONS

Polydimethylsiloxane 350 DST is used as a lubricant.
Polydimethylsiloxane 350 DST reduces friction in mechanical and processing systems.
Polydimethylsiloxane 350 DST improves smooth movement of plastic and rubber components.

Polydimethylsiloxane 350 DST is applied as a release agent.
Polydimethylsiloxane 350 DST prevents adhesion to molds and tooling surfaces.
Polydimethylsiloxane 350 DST improves demolding efficiency in plastics and elastomers.

Polydimethylsiloxane 350 DST is used in personal care formulations.
Polydimethylsiloxane 350 DST enhances skin feel and spreadability.
Polydimethylsiloxane 350 DST provides softness and slip without greasiness.

Polydimethylsiloxane 350 DST is incorporated into hair care products.
Polydimethylsiloxane 350 DST improves shine and manageability.
Polydimethylsiloxane 350 DST reduces frizz and static.

Polydimethylsiloxane 350 DST is used as a defoamer base fluid.
Polydimethylsiloxane 350 DST suppresses foam formation in processing systems.
Polydimethylsiloxane 350 DST enhances antifoam persistence.

Polydimethylsiloxane 350 DST is applied in textile and fiber processing.
Polydimethylsiloxane 350 DST improves lubrication during spinning and weaving.
Polydimethylsiloxane 350 DST enhances fabric hand feel.

Polydimethylsiloxane 350 DST is used in pharmaceuticals and medical devices.
Polydimethylsiloxane 350 DST acts as a processing aid and lubricant.
Polydimethylsiloxane 350 DST supports inert and stable formulations.

Polydimethylsiloxane 350 DST is used in food-contact and industrial applications where permitted.
Polydimethylsiloxane 350 DST provides non-reactive surface modification.
Polydimethylsiloxane 350 DST improves equipment cleanliness and efficiency.

Polydimethylsiloxane 350 DST is used as a defoaming agent in industrial processes.
Polydimethylsiloxane 350 DST rapidly suppresses foam in aqueous systems.
Polydimethylsiloxane 350 DST improves process efficiency by preventing foam buildup.

Polydimethylsiloxane 350 DST is used in food processing equipment.
Polydimethylsiloxane 350 DST controls foam during food manufacturing operations.
Polydimethylsiloxane 350 DST improves heat transfer efficiency in food processing systems.

Polydimethylsiloxane 350 DST is used in lubricants.
Polydimethylsiloxane 350 DST reduces friction between moving mechanical parts.
Polydimethylsiloxane 350 DST enhances lubricity in high-temperature applications.

Polydimethylsiloxane 350 DST is used in cosmetics.
Polydimethylsiloxane 350 DST improves spreadability in creams and lotions.
Polydimethylsiloxane 350 DST provides a smooth and silky skin feel.

Polydimethylsiloxane 350 DST is used in personal care products.
Polydimethylsiloxane 350 DST enhances slip in hair conditioners and styling products.
Polydimethylsiloxane 350 DST reduces tackiness in topical formulations.

Polydimethylsiloxane 350 DST is used in pharmaceuticals.
Polydimethylsiloxane 350 DST acts as an excipient in oral and topical dosage forms.
Polydimethylsiloxane 350 DST helps prevent foaming during pharmaceutical manufacturing.

Polydimethylsiloxane 350 DST is used in textile processing.
Polydimethylsiloxane 350 DST improves fiber lubrication during weaving and knitting.
Polydimethylsiloxane 350 DST reduces yarn breakage in textile operations.

Polydimethylsiloxane 350 DST is used in paper manufacturing.
Polydimethylsiloxane 350 DST prevents foam formation in pulp processing.
Polydimethylsiloxane 350 DST improves paper surface smoothness.

Polydimethylsiloxane 350 DST is used in chemical manufacturing.
Polydimethylsiloxane 350 DST controls foam in reactors and mixing vessels.
Polydimethylsiloxane 350 DST enhances process stability in high-shear systems.

Polydimethylsiloxane 350 DST is used in coatings and paints.
Polydimethylsiloxane 350 DST improves leveling and flow in coating formulations.
Polydimethylsiloxane 350 DST reduces surface defects such as craters and pinholes.

Polydimethylsiloxane 350 DST is used in plastic processing.
Polydimethylsiloxane 350 DST acts as a processing aid in polymer extrusion.
Polydimethylsiloxane 350 DST enhances mold release performance.

Polydimethylsiloxane 350 DST is used in automotive applications.
Polydimethylsiloxane 350 DST lubricates rubber and plastic components.
Polydimethylsiloxane 350 DST improves durability of automotive parts.

Polydimethylsiloxane 350 DST is used in electrical insulation systems.
Polydimethylsiloxane 350 DST provides dielectric stability in electronic components.
Polydimethylsiloxane 350 DST protects components from moisture and contamination.

DESCRIPTION

Polydimethylsiloxane 350 DST is a clear, colorless, non-volatile silicone fluid.
Polydimethylsiloxane 350 DST consists of linear siloxane chains with methyl side groups.
Polydimethylsiloxane 350 DST exhibits low intermolecular forces and excellent flow behavior.

Polydimethylsiloxane 350 DST has very low surface tension.
Polydimethylsiloxane 350 DST spreads easily over solid surfaces.
Polydimethylsiloxane 350 DST provides effective wetting and lubrication.

Polydimethylsiloxane 350 DST is chemically inert toward most substrates.
Polydimethylsiloxane 350 DST is resistant to oxidation and hydrolysis.
Polydimethylsiloxane 350 DST maintains performance under thermal stress.

Polydimethylsiloxane 350 DST is insoluble in water.
Polydimethylsiloxane 350 DST is compatible with many organic oils and solvents.
Polydimethylsiloxane 350 DST can be emulsified using suitable surfactants.

Polydimethylsiloxane 350 DST is non-corrosive and non-staining.
Polydimethylsiloxane 350 DST provides long-term stability in stored formulations.
Polydimethylsiloxane 350 DST maintains viscosity consistency over time.

Polydimethylsiloxane 350 DST is a linear silicone polymer with a viscosity of approximately 350 cSt.
Polydimethylsiloxane 350 DST appears as a clear, colorless, and odorless fluid.
Polydimethylsiloxane 350 DST is chemically inert and non-reactive under normal conditions.

Polydimethylsiloxane 350 DST exhibits excellent thermal stability across a wide temperature range.
Polydimethylsiloxane 350 DST has low surface tension and high spreading ability.
Polydimethylsiloxane 350 DST is insoluble in water but soluble in many organic solvents.

Polydimethylsiloxane 350 DST provides outstanding lubricating and defoaming performance.
Polydimethylsiloxane 350 DST resists oxidation and degradation during long-term use.
Polydimethylsiloxane 350 DST maintains performance under shear stress.

Polydimethylsiloxane 350 DST is compatible with many polymers, surfactants, and additives.
Polydimethylsiloxane 350 DST does not promote corrosion of metals.
Polydimethylsiloxane 350 DST offers excellent dielectric properties.

Polydimethylsiloxane 350 DST should be stored in clean, tightly sealed containers.
Polydimethylsiloxane 350 DST is widely used in industrial, cosmetic, food-contact, and pharmaceutical applications.
Polydimethylsiloxane 350 DST is valued for its versatility, stability, and multifunctional performance.

PROPERTIES

Chemical Nature: Linear polydimethylsiloxane fluid
Appearance: Clear, colorless liquid
Odor: Odorless
Viscosity: ~350 cSt at 25°C
Density: ~0.965 g/cm³ at 25°C
Refractive Index: ~1.403–1.405 at 25°C
Flash Point: >300°C
Pour Point: Approximately −50°C
Vapor Pressure: Very low at ambient temperature
Surface Tension: ~20–21 mN/m at 25°C
Solubility in Water: Insoluble
Solubility in Organic Solvents: Soluble in many non-polar solvents
Thermal Stability: Stable up to ~200–250°C (short-term higher tolerance)
Oxidation Resistance: High
Dielectric Strength: Excellent electrical insulating properties
Volatility: Low
Shelf Life: Long-term stability under proper storage

FIRST AID

Inhalation:
Move to fresh air if mist is inhaled.
Seek medical attention if discomfort persists.

Skin Contact:
Wash skin with soap and water.
Product is generally non-irritating.

Eye Contact:
Rinse eyes with water for several minutes.
Seek medical attention if irritation occurs.

Ingestion:
Rinse mouth and drink water.
Seek medical advice if large amounts are ingested.

Note to Physicians:
Treat symptomatically; material is considered low toxicity.

HANDLING AND STORAGE

Handling:
Avoid generating mist or aerosol.
Use standard industrial hygiene practices.
Wear protective gloves and goggles when handling large volumes.

Avoidance:
Avoid strong oxidizing agents.
Prevent contamination with reactive chemicals.

Spill Procedures:
Absorb with inert material.
Clean surfaces to prevent slip hazards.

Storage:
Store in tightly closed containers.
Keep in a cool, dry, well-ventilated place.
Protect from extreme heat and contamination.