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SILICON OIL (DIMETHICONE 500)

SILICON OIL (DIMETHICONE 500) = PDMS = DIMETHYLPOLYSILOXANE

Cas Number: 63148-62-9 / 9016-00-6 / 9006-65-9 
EC Number : 203-492-7
MDL: MFCD00148360
Molecular Formula: (H3C)3Si-(OSi(CH3)2-)NOSi(CH3)3 / (C2H6OSi)n


Silicon Oil (Dimethicone 500) acts as an emollient and conditioning agent. 
Silicon Oil (Dimethicone 500) is a 100% active linear silicone polymer (polydimethylsiloxane) which is usually viscous and more oil-like. 
Silicon Oil (Dimethicone 500) is made from dimethyldichlorosilane which is produced by powdered silicon (silicone dioxide) and methyl chloride. 


Silicon Oil (Dimethicone 500) is a polydimethylsiloxane obtained by hydrolysis and polycondensation of dichlorodimethylsilane and chlorotrimethylsilane. 
The degree of polymerization (n) is such that the mean kinematic viscosity is 500mm² /s at 25°C.
Silicon Oil (Dimethicone 500) is Clear, Colorless and Odorless linear 100% Polydimethylsiloxane Silicone Fluids / PDMS Silicone Oil.
Silicon Oil (Dimethicone 500) is a 100% active linear silicone polymer with a viscosity of 500 cps.


Linear silicones are large high-molecular polymers (polydimethylsiloxanes) and usually are viscous and more oil-like. 
Silicon Oil (Dimethicone 500) is a non-volatile silicone oil. 
Silicon Oil (Dimethicone 500) has a viscosity of 500 centistrokes (medium thick), which is heavier. 
Silicone oils are derived from silica (sand and quartz are silicas).


Silicon Oil (Dimethicone 500) is Clear, emollient, Non-occlusive, skin protectant, Water repellant, Smooth feel, spreadability, Lubricity.
Silicon Oil (Dimethicone 500) is a high molecular weight silicone polymer dispersed in a low viscosity dimethicone fluid that gives a product a lubricious, silky feeling. 
Silicon Oil (Dimethicone 500) is a clear, colorless polydimethylsiloxane liquid, available in a range of six narrow viscosities: 20 cSt, 100 cSt, 350 cSt, 500 cSt, 1,000 cSt and 12,500 cSt. 


Silicon Oil (Dimethicone 500) is an incredibly popular 500cS low viscosity silicone for use in a wide variety of industries. 
Heat Tolerance: Best added into the cool or room temperature product.  
Heating might evaporate the low molecular weight carrier for the polymer thus changing Silicon Oil (Dimethicone 500)'s characteristics. 
Silicon Oil (Dimethicone 500) is a 100% polydimethyl siloxane of viscosity 500 mm2/s. 
Silicon Oil (Dimethicone 500) differs from organic material in its physical and chemical properties such as high and low temperature stability, good dielectric properties, low inter facial energy, and chemical inertness. 


Silicon Oil (Dimethicone 500) is a 100% active linear silicone polymer with a viscosity of 500 cps
Silicon Oil (Dimethicone 500) is a pure & concentrated ingredient. 
Silicon Oil (Dimethicone 500) is a 100% active linear silicone polymer with a viscosity of 500 cps. 
Linear silicones are large high-molecular polymers (polydimethylsiloxanes) and usually are viscous and more oil-like. 
Silicon Oil (Dimethicone 500) is Clear, slightly viscous liquid, odorless. 


Silicon Oil (Dimethicone 500) is Insoluble in water, soluble in alcohol, dispersible in oils & fats.
Silicon Oil (Dimethicone 500), also known as dimethylpolysiloxane or dimethicone, belongs to a group of polymeric organosilicon compounds that are commonly referred to as silicones. 
Silicon Oil (Dimethicone 500) is the most widely used silicon-based organic polymer due to its versatility and properties leading to many applications. 


Silicon Oil (Dimethicone 500) is a 100% active linear silicone polymer with a viscosity of 500 cps.
Silicon Oil (Dimethicone 500) is a 100% active linear silicone polymer with a viscosity of 500 cps.
Pure & concentrated ingredient.
Not a finished cosmetic product. 
Use as raw material for making cosmetics or add directly to finished skin care products. 
Linear silicones are large high-molecular polymers (polydimethylsiloxanes) and usually are viscous and more oil-like. 


Silicon Oil (Dimethicone 500) is Clear, slightly viscous liquid, odorless. 
Silicon Oil (Dimethicone 500) is Insoluble in water, soluble in alcohol, dispersible in oils & fats.
The main characteristics of Silicon Oil (Dimethicone 500) is non-toxic and tasteless, with physiological inertia, good chemical stability, electrical insulation and weather resistance, good hydrophobicity, and has high shear resistance, Silicon Oil (Dimethicone 500) can be used at -50 °c to 200 °c for a long time.


Silicon Oil (Dimethicone 500) is a 100% active silicone polymer with a viscosity of 500 cps. 
Silicones are polymers made up of oxgyen & silicon (polydimethylsiloxanes). 
Silicon Oil (Dimethicone 500) is Clear, viscous liquid, odourless. 
Silicon Oil (Dimethicone 500) is Insoluble in water, soluble in alcohol, dispersible in oils & fats. 
Silicon Oil (Dimethicone 500) is clear, colorless liquids available in various viscosities. 


Silicon Oil (Dimethicone 500) is a fluid mixture of fully methylated linear siloxane polymers end-blocked with trimethylsiloxy units. 
Silicon Oil (Dimethicone 500) is a linear monomethyl polysiloxane. 
Silicon Oil (Dimethicone 500) are safe as used in cosmetic formulations, vulcanization.
Silicon Oil (Dimethicone 500) is clear transparent odorless liquids, that have good dielectric, damping, surface-active, water-repellent and anti-adhesive, defoaming properties, resistant to low and high temperatures, soluble in most organic solvents.


USES and APPLICATIONS of SILICON OIL (DIMETHICONE 500):
-Silicon Oil (Dimethicone 500) shows chemical stability, hence suitable for anti-foams and color cosmetics. 
-Silicon Oil (Dimethicone 500) takes out the whitening of creams & lotions when rubbed into the skin. 
-Silicon Oil (Dimethicone 500) imparts a non-greasy and dry feel. 
Silicon Oil (Dimethicone 500) improves wet & dry combing and offers softness & silky gloss in hair care products. 


-Silicon Oil (Dimethicone 500) makes colors more dispersible (solvent). 
-Recommended for shampoos & conditioners, color cosmetics (lipsticks, lip balms, makeup) and skin protectant products. 
-Silicon Oil (Dimethicone 500) is GMO- & preservative-free and vegan certified. 
The shelf life is 24 months.


-Silicon Oil (Dimethicone 500) is used both in the pharmaceutical and food sectors. 
-In the pharmaceutical sector Silicon Oil (Dimethicone 500) is used in antiflatulence and antacid preparations. 
-Silicon Oil (Dimethicone 500) acts as an antifoam agent to prevent or relieve flatulence in the alimentary canal and forms a protective lining on e.g. the gastric mucous membrane. 


-Silicon Oil (Dimethicone 500) may be used to make tablets and coated tablets. 
-Silicon Oil (Dimethicone 500) is often combined with fermentation preparations. 
-Silicon Oil (Dimethicone 500) is also used to control foam in fermentation and downstream processes, such as active-ingredient extraction and solvent recovery, especially when USP/EP compliant products are mandatory. 


-In the food sector, Silicon Oil (Dimethicone 500) is used predominantly to control foam in lipophilic systems (foods rich in oil or fat, e.g. deep-frying oil) or for surface treatment. 
-Silicon Oil (Dimethicone 500) also serves as the base material in the production of antifoams compliant with the regulations pertaining to food for human consumption.


-Applications of Silicon Oil (Dimethicone 500) Include:
 * Laboratory Bath Fluids
 * Heat Transfer Fluids
 * Dielectric Fluids
 * Low Viscosity Damping Fluids
 * ORC Turbo Generator Fluids
 * Fast evaporating fluids for Personal
 * Care formulations
 * Low MW Fluids for Research
 * Low Viscosity Hydraulic Fluids
 * Refractive Index Matching Fluids
 * RI Matching Fluids for LED and Optics
 * Low Dielectric Constant Fluids for Photonics
 * VOC Exempt Fluids for Renewable Energies
 * Lubricants for Plastic Parts
 * Lubricants for Rubber Parts
 * Ozone Safe Solvents
 * High Pressure Fluid
 * High Compressibility Fluids


-Silicon Oil (Dimethicone 500) is used for its chemical stability in anti-foams, color cosmetics and hair care products. 
Takes out the whitening of creams and lotions when rubbed into the skin and gives a non-greasy, dry feel. 
Improves wet and dry combing, gives softness and silky gloss in hair care products. 
Makes colors more dispersible (solvent).
-Silicon Oil (Dimethicone 500) complies with the requirements set down in the monographs "Dimeticone" (EP) and "Dimethicone" (USP / NF). 


-Silicon Oil (Dimethicone 500) is Suitable for mixing in cosmetics that require a skin feel, slippery when used (slip) can be used with both skin care products and hair care products. 
-Silicon Oil (Dimethicone 500) will stick on the skin or hair to make it feel slippery including the use of pressing the dough pressed-powder so that the dough can stick together.


-Silicon Oil (Dimethicone 500) is a colorless, odorless, non-toxic and non-irritating products, chemical stability, heat resistance, cold resistance, water repellency, lubricity, high refraction, storage stability and compatibility with commonly used cosmetic ingredients.
-Maintain asset reliability and systems performance in port and at sea in the Marine Industry.
-Adhesives and sealants can resist weathering, degradation, loss of bonding and sealing strength, and softening or cracking.


-Silicon Oil (Dimethicone 500) is used A useful ingredient in protective creams, skin lotions, hand creams, waterless hand cleaners, makeup, shampoos, de-frizz solutions and non-staining scent sprays. 
-Silicon Oil (Dimethicone 500) offers skin protection with a light touch, generally used where smooth feel and softness are required.


-Silicon Oil (Dimethicone 500) is a base fluid and volatile carrier suitable for use in a number of personal care products.
*Skin protection
*Water-repellency
*Imparts soft velvety skin feel
*Non-occlusive
*Detackification
*Emollient
*Spreads easily on both skin and hair


-Silicon Oil (Dimethicone 500) adds slip and glide, reducing tackiness. 
Silicon Oil (Dimethicone 500) offers conditioning properties when used in hair and skin care applications.
Silicone oils are derived from silica (sand and quartz are silicas).
-Silicon Oil (Dimethicone 500) is used to formulate with other organic and inorganic material for topical applications.


-As an excipient (inactive ingredients), Silicon Oil (Dimethicone 500) in topical pharmaceutical applications, including dermatological treatments, can provide emolliency, ease of spreading, smooth feel, long lasting lubrication and reduced tackiness.
-Silicon Oil (Dimethicone 500) is currently used in a range of dermatological treatments and pharmaceutical applications such as creams, gels and sticks. 


-As a skin protectant active ingredient in over-the-counter topical applications, Silicon Oil (Dimethicone 500) helps prevent and temporarily protects skin and lips against chafing, chapping, cracking and windburn in accordance with FDA guidelines. 
-Silicon Oil (Dimethicone 500) can be used in colour cosmetics, sun care, shower gels, skincare.
-Silicon Oil (Dimethicone 500) can be used up to 30% with Capric/ Caprylic Triglyceride and up to 9% in Jojoba oil. 
In addition, Silicon Oil (Dimethicone 500) can also be blended into Sweet almond, Soybean and Sunflower oil but only up to 3%


-Silicon Oil (Dimethicone 500) is used Skin Care, Hair Care, Colour Cosmetics
-In cosmetics applications, low viscosity silicones are often used as emollients in skin care preparations offering excellent feel and low tack, whilst its spread characteristics can enhance formulation dispersion on the skin as well offering a non-greasy after effect.  
-Silicon Oil (Dimethicone 500) is also possible to reduce the whitening or ‘soaping’ effect seen in W/O emulsions.


-Silicon Oil (Dimethicone 500) is used Active ingredient in a variety of automotive, furniture, metal and specialty polishes in paste, emulsion and solvent-based polishes and aerosols
-Silicon Oil (Dimethicone 500)'s Various applications including cosmetic ingredient, elastomer and plastics lubricant, electrical insulating fluid, foam preventive or breaker, mechanical fluid, mold release agent, surface active agent, and solvent-based finishing and fat liquoring of leather.


-Silicon Oil (Dimethicone 500) is used:
. Sewing thread using silicone oil
. Mechanical silicone oil
. Textile agent
. Sewing thread using silicone oil
. Dielectric coolant.
. Insulation and damping fluid for electrical and electronic equipment
. Release agent
. Foam control
. Surfactant
. lubricant
. Ingredients for cosmetics and personal care preparations, polishes and specialty chemicals
. Plastic additives


-For industrial applications: 
Silicone fluids meet a wide variety of applications in many industries. 
They are good coatings additive, plastics additive, damping fluid, plastics lubricant, electrical insulating fluid, mechanical fluid, de-foaming, mold release and surface active agent for machinery, electrical appliances, and textile... 
Silicon Oil (Dimethicone 500) is also used as active ingredient in a variety of automotive, furniture, metal, leather and specialty polishes, Sewing thread using silicone oil etc…


-For personal care applications of Silicon Oil (Dimethicone 500):
They are ideal conditioning agent/additive for hair care products, shampoo, rinse-off conditioners, bath shower gel and other personal care and cosmetic products. 
Silicon Oil (Dimethicone 500) provides easy combing and detangling for wet and dry hair, lubricious, smooth feel as well as softness and gloss to the hair.


-Silicon Oil (Dimethicone 500) can be used in a wide range of applications ranging from heat transfer media and hydraulic fluids to polish and anti-foam formulation. 
-Silicon Oil (Dimethicone 500) has some feature as Heat transfer media, Hydraulic fluids, Water repellents, Polish, Lubricants, Antifoam
-Silicon Oil (Dimethicone 500) is not a finished cosmetic product. 
Silicon Oil (Dimethicone 500) is Used as raw material for making cosmetics or add directly to finished skin care products.


-Silicon Oil (Dimethicone 500)'s Typical use level 1-20% (up to 50% possible), add to oil phase of formulas or at the end of formula. 
Do not heat over 50°C (125°F). 
For external use only.
-Liquids Silicon Oil (Dimethicone 500), PDMS 1000 are used as damping liquid, silicone lubricant.
-Silicon Oil (Dimethicone 500) is a moisturizing silicone oil that improves the texture and slip of cosmetic formulations.


-Silicon Oil (Dimethicone 500) is used Hair & skin conditioning products as shampoos, conditioners, creams, lotions, but also color cosmetics (e.g. lipsticks, lip balms, makeup). 
-Silicon Oil (Dimethicone 500) is used Skin protectant products.
-Silicon Oil (Dimethicone 500) is made from dimethyldichlorosilane which is produced by powdered silicon (silicone dioxide) and methyl chloride. 
-Silicon Oil (Dimethicone 500) is then hydrolyzed to give a hydrolysate of polysiloxanes. 
In a polymerization reaction with water the polysiloxanes are then polymerized to linear silicone polymers with different chain length (dimethicones).


-Silicon Oil (Dimethicone 500) is used as a moisturizer and emollient to treat or prevent dry, rough, scaly, itchy skin and minor skin irritations (e.g., diaper rash, skin burns from radiation therapy).
-Silicon Oil (Dimethicone 500) is used for its chemical stability in anti-foams, color cosmetics and hair care products
-Silicon Oil (Dimethicone 500) takes out the whitening of creams and lotions when rubbed into the skin and gives a non-greasy, dry feel
-Silicon Oil (Dimethicone 500) improves wet and dry combing, gives softness and silky gloss in hair care products


-Silicon Oil (Dimethicone 500) makes colors more dispersible (solvent)
-Silicon Oil (Dimethicone 500) is used Hair & skin conditioning products as shampoos, conditioners, creams, lotions, but also color cosmetics (e.g. lipsticks, lip balms, makeup). 
Skin protectant products.
-Silicon Oil (Dimethicone 500) is Used for its chemical stability in anti-foams, colour cosmetics and hair care products. 


-Will take out the whitening of creams and lotions when rubbed into the skin and gives a non-greasy, dry feel. 
Improves wet & dry combing, gives softness & silky gloss in hair care products. 
-Silicon Oil (Dimethicone 500) makes colours better dispersible (solvent). 
-Typical use level 1 - 20% (up to 50% possible), add to oil phase of formulas or at the end of formula. 
Do not heat over 50C/125F. 


-Silicon Oil (Dimethicone 500) is used Hair & skin conditioning products as shampoos, conditioners, creams, lotions, but also colour cosmetics (e.g. lipsticks, lip balms, makeup).
-A silicone oil consisting of a mixture of fully methylated linear siloxane polymers end-blocking with trimethylsiloxy units. 
Silicon Oil (Dimethicone 500) is commonly used in skin and hair products.
-Silicon Oil (Dimethicone 500) is a form of silicone used to give products lubricity, slip, and good feel.


-Silicon Oil (Dimethicone 500) can also serve as a formulation defoamer and help reduce the feeling of greasiness that some creams leave on the skin immediately upon application. 
-In addition, Silicon Oil (Dimethicone 500) is reported to protect the skin against moisture loss when used in larger quantities. 
-Silicon Oil (Dimethicone 500) improves product flow and spreadability. 
In combination with other ingredients, dimethicone becomes a good waterproofing material for sunscreen emulsions, and helps reduce the greasiness often seen in high-SPF preparations.


-Silicon Oil (Dimethicone 500) is used Industrial sector used as lubricating oil, anti-vibration oil, insulating oil, defoaming agent, mold release agent, etc.; 
-Silicon Oil (Dimethicone 500) is widely used as insulation, lubrication, anti-vibration, anti-dust oil, dielectric fluid and heat carrier, and used as defoaming, additives for film stripping, paint and cosmetics for daily use, etc.


-Defoamer:
In the process of cleaning and pre-film for industrial circulating cooling water system, the foam generated by adding a large amount of foam-generating agent can be removed, and the foam caused by pollution can also be eliminated. 
The use concentration is generally about 10 mg/L. 
The defoaming performance of the product is good, but the foam suppression performance is poor, and the foam generation cannot be continuously inhibited.


BENEFITS of SILICON OIL (DIMETHICONE 500):
*Non-occlusive Film Forming
*Long-wear characteristics
*Wash-off resistant (waterproofing)
*Used for its chemical stability in anti-foams, color cosmetics and hair care products
*Takes out the whitening of creams and lotions when rubbed into the skin and gives a non-greasy, dry feel
*Improves wet and dry combing, gives softness and silky gloss in hair care products
*Makes colors more dispersible (solvent)


FORM of SILICON OIL (DIMETHICONE 500):
1. Clear, colorless, odorless fluids
2. High Viscosities
3. Non-Flammable
4. High Damping action
5. Low Temperature stability
6. High Temperature Stability
7. Little viscosity change at temperature
8. Inert to virtually all o-rings, gaskets, seals and valves 
9. Excellent lubrication
10. High oxidation resistance
11. High dielectric strength
12. High water repellency
13. High Shear resistance
14. High molecular weight
15. Although not recommended for silicone o-rings


PROPERTIES of SILICON OIL (DIMETHICONE 500):
1. Smoothness & softness & hydrophobicity & good chemical stability & insulation property.
2. High and low temperature resistance & high flash point.
3. Low freezing point (it can be chronically used in the temperature from -50℃ to +200 ℃). 
4. Small viscosity-temperature coefficicent & big compression ratio & low surface tension.


FEATURES of SILICON OIL (DIMETHICONE 500):
*Good spread
*Non-tacky emollient
*Low surface tension
*Skin lubricity
*Typical Properties
*Viscosity (at 25°C): 500cS
*Refractive Index (at 25°C): 1.403
*Flash Point: >315°C


WHAT IS HIGH VISCOSITY PURE SILICONE FLUID?
High Viscosity Pure Silicone Fluids are clear, colorless and odorless linear Polydimethylsiloxane oils (Polydimethylsiloxanes) that range in viscosities from 5,000cSt, 10,000cSt, 12,500cSt, 30,000, 60,000cSt, & 100,000cSt.
They are characterized by their high damping action, excellent lubricity, inertness to plastics, rubbers and metals, high dielectric strength, high resistance to shear, thermal stability, wide service temperature range and low viscosity change at temperature. 
Due to their high viscosity, inertness and lubricity, High Viscosity Silicone Fluids are widely used as lubricant for o-rings, gaskets, valves and seals.
Polydimethylsilicone liquids are blend of polymers with linear and branched structure.


PHYSICAL and CHEMICAL PROPERTIES of SILICON OIL (DIMETHICONE 500):
Molar Mass: 236.534
Density: 0.971
Melting Point: -35°C
Boling Point: 155-220°C
Water Solubility: INSOLUBLE
Storage Condition: Room Temprature
Refractive Index: 0
Appearance: colorless, clear, transparent liquid
Smell: Odorless
Viscosity (25°C): 50~1,000,000 cSt
Specific Gravity (25°C): 0.955~0.978 g/cm3


Volatile Matter Content (150°C/24hr): ≤1.5%
Refractive Index (25°C): 1.390~1.410
Flash Point: 260°C~300°C
Pour Point: -50°C
Viscosity Temperature Coefficient: 0.59~0.61
Coefficient of Expansion: 0.00094~0.00104 cc/cc/°C
Thermal Conductivity (25°C): 0.10~0.16
Dielectric Constant (25°C, 50Hz): 2.60-2.80
Dielectric Loss Factor(25°C, 50Hz): ≤1.0×104
Volume Resistivity: ≥1.0×1015 Ω·cm
Breakdown Voltage: ≥1.0 KV/mm
Recommended dosage: 1~3%


FIRST AID MEASURES of SILICON OIL (DIMETHICONE 500):
-Description of first-aid measures:
*If inhaled:
After inhalation: 
Fresh air.

*In case of skin contact: 
Take off immediately all contaminated clothing. 
Rinse skin with water/ shower.

*In case of eye contact:
After eye contact: 
Rinse out with plenty of water. 
Remove contact lenses.

*If swallowed:
After swallowing: 
Make victim drink water (two glasses at most). 
Consult doctor if feeling unwell.

-Indication of any immediate medical attention and special treatment needed:
No data available


ACCIDENTAL RELEASE MEASURES of SILICON OIL (DIMETHICONE 500):
-Environmental precautions:
Do not let product enter drains.

-Methods and materials for containment and cleaning up:
Cover drains. 
Collect, bind, and pump off spills. 
Take up with liquid-absorbent material.
Dispose of properly. 


FIRE FIGHTING MEASURES of SILICON OIL (DIMETHICONE 500):
-Extinguishing media:
*Suitable extinguishing media:
Foam 
Carbon dioxide (CO2) 
Dry powder

*Unsuitable extinguishing media:
For this substance/mixture no limitations of extinguishing agents are given.

-Further information:
Prevent fire extinguishing water from contaminating surface water or the ground water system.

EXPOSURE CONTROLS/PERSONAL PROTECTION of SILICON OIL (DIMETHICONE 500):
-Control parameters:
--Ingredients with workplace control parameters
-Exposure controls:
--Personal protective equipment:

*Eye/face protection:
Use Safety glasses.
*Respiratory protection
Not required.

-Control of environmental exposure:
Do not let product enter drains.


HANDLING and STORAGE of SILICON OIL (DIMETHICONE 500):
-Conditions for safe storage, including any incompatibilities
*Storage conditions:
Tightly closed.


STABILITY and REACTIVITY of SILICON OIL (DIMETHICONE 500):
-Chemical stability:
The product is chemically stable under standard ambient conditions (room temperature) .

-Possibility of hazardous reactions:
No data available


SYNONYMS:
Silicone Fluid 
Polydimethylsiloxane 
PDMS Polydimethylsiloxane 
Dimethyl Silicone Oil 
Methyl Silicone Oil 
Dimethicone 
Simethicone
Silcorel(r) adp1000 antifoam compound
silicone oil dc 200
reduced volatility polydimethylsiloxane
polydimethylsiloxane 158'000
polydimethylsiloxane 16'000
polydimethylsiloxane 173'000
polydimethylsiloxane 1'850
dimethicone
dimethicream
dimethylpoly-siloxane
dimethyl silicone
dermafilm
latex
silbar
simethicone
polydimethylsiloxane, trimethylsiloxy term
polydimethylsiloxane, trimethylsiloxy terminated, blend
polydimethylsiloxanes, trimethylsiloxy terminated
silicone fluid, 100
silicone fluid 1,000
silicone fluid 500
aeropax
polydimethylsiloxane emulsion
Poly(dimethylsiloxane)
polymethylsiloxane
PMS
polydimethylsiloxane
PDMS
dimethicone
silicone fluid
dimethyl siloxane
dimethylpolysiloxane
silicone oil
dimethylpolysiloxane hydrolysate

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