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Chemical Name: Polydimethylsiloxane (PDMS)
CAS Number: 63148-58-3
EINECS Number: 9006-65-9
Product Type: Silicone Fluid / Dimethyl Silicone Oil
Available Viscosity Grades: 10, 20, 50, 100, 200 and 350 mPa·s, with additional viscosity grades available upon request
Primary Keywords: Dimethyl Silicone Oil, Polydimethylsiloxane Fluid, PDMS Silicone Oil, Silicone Oil Viscosity Grades, Industrial Silicone Fluid, Silicone Oil for Mold Release, Silicone Oil for Lubrication, Silicone Oil for Personal Care, IOTA-201 Silicone Oil Supplier
IOTA-201 Dimethyl Silicone Oil is a polydimethylsiloxane (PDMS) fluid designed for applications requiring smooth lubrication, water repellency, surface slip, flexibility and thermal stability.
As a widely used silicone-based polymer, dimethyl silicone oil features a silicon-oxygen backbone with methyl groups attached to the silicon atoms. This molecular structure contributes to its characteristic surface properties, chemical stability and performance across a broad range of industrial and consumer applications.
Depending on the viscosity grade, IOTA-201 can be used as a low-viscosity flowing fluid or a higher-viscosity functional additive. Typical applications include personal care formulations, rubber and plastic processing, textile finishing, leather treatment, coatings, mechanical lubrication and industrial mold release.
For manufacturers seeking a versatile silicone fluid, selecting the appropriate viscosity is essential to achieving the desired balance of flowability, lubricity, surface feel and application performance.
Why is dimethyl silicone oil used in so many industries? Its value comes from the combination of several functional properties.
Excellent lubricity and surface slip
Dimethyl silicone oil can reduce friction between surfaces and provide a smooth, slippery feel. It is suitable for selected lubrication, textile finishing, surface treatment and personal care applications.
Water repellency and moisture resistance
Its hydrophobic nature helps improve water repellency on suitable surfaces. Depending on the substrate and formulation, it can be incorporated into leather treatments, textile finishes and protective surface formulations.
Good thermal stability
Dimethyl silicone oil generally maintains useful fluid properties across a broad temperature range. Actual operating limits depend on viscosity, exposure time, oxygen availability, system design and the required performance specifications.
Electrical insulation
Selected grades may be used in electrical and electronic applications where dielectric properties and moisture resistance are required. Suitability for transformer or other electrical equipment must be confirmed against the equipment manufacturer's specifications and the fluid's tested electrical properties.
Low surface tension
Compared with many conventional hydrocarbon-based fluids, dimethyl silicone oil has relatively low surface tension. This property can support spreading, wetting and surface-slip performance in appropriately designed formulations.
Flexible viscosity selection
Different viscosity grades provide different flow characteristics and application behavior. Lower-viscosity grades are generally easier to pump and spread, while higher-viscosity grades can provide a more persistent lubricating film or a different tactile effect.
The following table summarizes the typical viscosity grades and specifications supplied for IOTA-201.
| Parameter | IOTA-201-10 | IOTA-201-20 | IOTA-201-50 | IOTA-201-100 | IOTA-201-200 | IOTA-201-350 |
|---|---|---|---|---|---|---|
| Viscosity at 25°C (mPa·s) | 10 ± 2 | 20 ± 4 | 50 ± 5 | 100 ± 5 | 200 ± 10 | 350 ± 10 |
| Flash Point (°C, min.) | 160 | 210 | 270 | 310 | 310 | 310 |
| Density at 25°C (g/cm³) | 0.930–0.940 | 0.945–0.955 | 0.955–0.965 | 0.960–0.970 | 0.962–0.972 | 0.965–0.975 |
| Volatile Matter at 150°C for 3 Hours (%; max.) | 3 | 2 | 1.5 | 1.0 | 1.0 | 1.0 |
Note: Values are based on the supplied product specifications. Confirm the current technical data sheet, test methods and product-specific limits before finalizing a formulation or purchasing specification. The listed flash points should not be interpreted as recommended continuous operating temperatures.
Choosing the right viscosity is one of the most important steps when selecting dimethyl silicone oil for an industrial process.
IOTA-201-10 and IOTA-201-20 are suitable candidates when easy flow, rapid spreading and low fluid resistance are important.
Potential applications include:
Light lubrication and selected process aids
Formulations requiring a readily flowing silicone fluid
Surface treatment where fluid spreading is a priority
Selected personal care formulations, subject to cosmetic-grade and regulatory requirements
IOTA-201-50 and IOTA-201-100 offer a balance between flowability and lubricating-film persistence.
Potential applications include:
Rubber and plastic mold-release formulations
Textile softeners and finishing agents
Leather treatment and surface conditioning
Industrial lubricants and surface-slip additives
Selected coating and formulation applications
IOTA-201-200 and IOTA-201-350 may be appropriate where a more viscous fluid or a more persistent lubricating layer is desired.
Potential applications include:
Lubrication and surface protection
Selected mold-release and processing formulations
Formulations requiring a different balance of flow and film retention
Industrial applications where higher viscosity is specified
These categories are general selection guidelines rather than universal application rules. The best grade depends on the equipment, substrate, formulation, working temperature and target performance.
Dimethyl silicone oil can provide a smooth, silky skin feel and improve spreadability in selected cosmetic formulations. Depending on the grade and formulation, it may be used in creams, lotions, body-care products, shampoos and conditioners.
For cosmetic manufacturers, viscosity influences spreadability, sensory characteristics and formulation behavior. Cosmetic-grade suitability, ingredient documentation and applicable market regulations should be confirmed before use.
In rubber, plastic, latex and polyurethane processing, dimethyl silicone oil can serve as a component of mold-release agents, processing aids and surface-treatment formulations.
Its lubricating and surface properties can help facilitate demolding and reduce unwanted adhesion in suitable processes. Performance depends on mold material, substrate chemistry, application concentration and compatibility with subsequent painting, printing, bonding or coating operations.
Dimethyl silicone oil is used in selected lubrication and damping applications where silicone-fluid properties are beneficial.
Potential uses include specialized lubricants, damping fluids and process fluids. However, not every PDMS grade is suitable for every mechanical or electrical system. Applications involving hydraulic systems, brake fluids, transformers or safety-critical equipment require dedicated performance testing and explicit compatibility approval.
In textile processing, dimethyl silicone oil can help improve fabric softness, smoothness and hand feel. It may also be incorporated into selected yarn lubricants, fiber-processing aids and finishing formulations.
The selected grade and dosage should be optimized for fabric type, fiber composition, finishing equipment and required durability.
Dimethyl silicone oil can be used in leather-treatment formulations to improve softness, surface feel and water repellency under suitable conditions. It may also be combined with other finishing ingredients to achieve specific surface effects.
Compatibility with leather type, coating systems and downstream finishing processes should be evaluated before full-scale production.
In selected coatings and construction-related formulations, dimethyl silicone oil may act as a lubricant, surface modifier or component of a water-repellent treatment.
Its compatibility with binders, solvents, pigments and other additives is important. Because silicone fluids can affect coating adhesion, recoatability and surface defects, formulation trials are recommended before commercial use.
There is no single recommended dosage for every application of IOTA-201.
The required concentration can range from a few parts per million (ppm) to a high proportion of the total formulation, depending on the intended function and application method.
For example, a formulation using silicone oil as a minor surface modifier may require a very different concentration from a product in which silicone oil is the primary fluid.
To determine an appropriate dosage, manufacturers should evaluate:
The required lubricity, softness or water-repellent effect
The viscosity grade and chemical compatibility
The substrate and other formulation ingredients
The application process and target film thickness
The potential impact on adhesion, printability, coating and subsequent processing
A controlled laboratory trial is generally the best starting point. The dosage should then be adjusted based on measurable performance rather than adopting a universal concentration.
Different silicone oils are designed for different performance requirements. Understanding their differences can help buyers choose a suitable material.
Dimethyl silicone oil (PDMS): Commonly selected for lubricity, smooth surface feel, water repellency, electrical insulation in suitable applications and a wide range of viscosity options.
Methyl phenyl silicone oil: Contains phenyl groups and may offer different refractive-index, low-temperature or thermal-performance characteristics, depending on its molecular structure and grade.
Ethyl silicone oil: Contains ethyl substituents and can offer distinct low-temperature behavior and other specialized properties depending on its molecular structure and formulation.
These products are not automatically interchangeable. Selection should be based on the actual technical requirements, including viscosity, temperature range, volatility, compatibility and application-specific performance.
When evaluating a dimethyl silicone oil supplier, industrial buyers should consider more than price alone.
Important purchasing factors include:
Multiple viscosity grades: Options for different flow and lubrication requirements.
Technical documentation: Access to a current technical data sheet and relevant safety documentation.
Application support: Assistance with viscosity selection and formulation evaluation.
Batch consistency: Quality control against agreed specifications.
Packaging and logistics: Packaging options and delivery arrangements suited to the customer's purchasing requirements.
IOTA-201 is available in multiple viscosity grades to support different industrial formulation and processing needs. Buyers can identify the appropriate grade by specifying their target viscosity, application and required performance.
Q1: What is IOTA-201 silicone oil?
IOTA-201 is a dimethyl silicone oil based on polydimethylsiloxane (PDMS). It is used in selected lubrication, mold-release, textile-finishing, personal care and surface-treatment applications.
Q2: What is the CAS number of dimethyl silicone oil?
The CAS number provided for IOTA-201 is 63148-58-3. Buyers should verify the CAS number and chemical identity against the supplier's current product documentation for the exact grade.
Q3: What viscosity grades are available for IOTA-201?
The listed grades are 10, 20, 50, 100, 200 and 350 mPa·s at 25°C. Other grades may be available subject to supplier confirmation.
Q4: How do I choose between 10 cSt and 100 cSt silicone oil?
First confirm the viscosity units. The IOTA-201 specifications above are expressed in mPa·s, which is a unit of dynamic viscosity. cSt measures kinematic viscosity, so the two values are not numerically identical. Lower-viscosity fluids generally spread more easily, while higher-viscosity fluids can provide different film-retention and lubrication characteristics. The final choice depends on the process and required performance.
Q5: Can dimethyl silicone oil be used as a mold-release agent?
Yes, it can be used as a component of suitable mold-release formulations. The formulation must be tested for demolding performance, transfer, surface contamination and compatibility with subsequent painting, bonding or coating.
Q6: Is IOTA-201 suitable for cosmetics?
Dimethyl silicone oil is used in cosmetic formulations, but suitability depends on the exact grade, purity, documentation and applicable regulatory requirements. Confirm cosmetic-grade status before selecting IOTA-201 for personal care products.
Q7: What information should I provide when requesting a quotation?
Provide the target viscosity, intended application, required quantity, destination country and any special requirements for purity, packaging or documentation. This information helps the supplier recommend a suitable grade and prepare a more relevant quotation.
Looking for a reliable dimethyl silicone oil for industrial manufacturing, personal care formulations, mold release or textile finishing?
Contact IOTA Silicone Oil to discuss the appropriate IOTA-201 viscosity grade for your application.
Please include:
Target viscosity at 25°C
Application and expected performance
Estimated order quantity
Destination country
Required technical and regulatory documents
IOTA-201 Dimethyl Silicone Oil — flexible viscosity options for industrial lubrication, surface modification and formulation development.
Contact our sales team to request the current technical data sheet, discuss sample availability and obtain a quotation for your target grade.
