A grade-specific Safety Data Sheet (SDS) — with the complete hazard classification, handling precautions, and transport information — is supplied with every shipment and available on request. Confirm all safety and regulatory details against the SDS for your specific grade.
Request SDS →Silicone Oil 200 cSt is the most widely specified general-purpose linear PDMS (dimethicone) fluid — the balanced mid-range grade that sits between the 100 cSt fluid and the heavier 350 cSt grade. It is substantive enough to leave a durable, lubricating film yet still pours and spreads easily, which is why it is the default “all-rounder” dimethicone across personal care, release and lubrication, polishes, and antifoam work. It carries the low surface tension, high spreadability, thermal stability and dielectric strength common to the whole PDMS series, with a feel and film weight that most formulations are built around.
Typical Properties
The values below describe the nominal 200 cSt grade. They are typical values, not a specification; the Certificate of Analysis (CoA) for the lot you purchase governs.
| Property | Typical Value |
|---|---|
| INCI Name | Dimethicone |
| CAS Number | 9006-65-9 |
| Appearance | Clear, colorless liquid |
| Viscosity (25 °C) | ~200 cSt |
| Specific gravity (25 °C) | ~0.968 |
| Refractive index (25 °C) | ~1.403 |
| Solubility | Insoluble in water; soluble in many organic solvents |
| Flammability / handling | Refer to the current SDS |
Applications
In personal-care formulation, 200 cSt is the reference conditioning and slip fluid: it imparts smooth, non-greasy spreadability and detangling slip in hair and skin formulations and adds gloss, and it is the grade most cosmetic starting formulas are written against. This describes formulation behavior — feel, spreadability and film — and makes no skin-health claim. In release and lubrication, the 200 cSt film lubricates and demolds rubber, plastics and tires, and serves as a thread, valve and O-ring lubricant where a clean, non-staining, thermally stable fluid is needed. In polishes and protectants, it builds gloss and water-beading in furniture, automotive and metal polishes. As an antifoam base oil, 200 cSt is a common continuous phase carrying hydrophobic silica into aqueous and non-aqueous defoamers; dose against your foam load, not to a fixed percentage. It also works as a dielectric and light damping fluid and as a carrier or diluent that thins heavier silicones without raising surface tension.
Where 200 cSt sits on the ladder
Below 200 cSt sit 100, 50 and 10 cSt, which spread faster and lay down a thinner, lighter film; above it are 350, 500 and 1000 cSt, which are more substantive, more persistent and slower to spread. 200 cSt is the balanced midpoint — the grade to default to when you do not yet know which way the formulation needs to move. The silicone oil viscosity guide walks the full ladder grade by grade.
Grades & bulk sourcing
RawSource supplies Silicone Oil 200 cSt in drums, totes and IBCs, with bulk quantities held in domestic US stock for short lead times. Every lot ships with a CoA, and the SDS is available on request. Confirm the grade for your application before you commit a production run — match viscosity to the spreading, persistence and film weight your formulation needs.
Related products
Compare neighboring grades and identifiers: Silicone Oil 100 cSt, Silicone Oil 350 cSt, Silicone Oil 500 cSt, Silicone Oil 1000 cSt, and the parent Dimethicone (PDMS fluid). See the full range on the bulk silicone oil supplier hub.
Frequently Asked Questions
What does cSt mean in silicone oil?
cSt is centistokes, the unit of kinematic viscosity. For silicone oil (PDMS, CAS 9006-65-9) it indicates how thin or thick the fluid is; 200 cSt is a balanced mid-range grade.
What is silicone oil 200 cSt used for?
It is the general-purpose dimethicone grade used as a conditioning and slip fluid in personal-care formulation, a release and lubrication fluid for rubber and plastics, a gloss agent in polishes, an antifoam base oil, and a dielectric/damping and carrier fluid. Match the grade to your application.
How does silicone oil 200 cSt differ from the 100 and 350 cSt grades?
All three share CAS 9006-65-9 and differ only in chain length and viscosity. 200 cSt lays down a more substantive, more persistent film than 100 cSt and spreads more readily than 350 cSt. Step down to 100 cSt for faster spread and a lighter film; step up to 350 cSt for a heavier, longer-lasting film.
What is the CAS number for silicone oil 200 cSt?
Silicone oil (dimethicone, PDMS) carries CAS 9006-65-9 with the repeating-unit formula (C2H6OSi)n. The 200 cSt label is the viscosity grade, not a separate CAS; all dimethicone viscosity grades share this number.
Can silicone oil 200 cSt be supplied in bulk?
Yes. RawSource supplies 200 cSt silicone oil in drum, tote, and IBC quantities from domestic US stock. Request a bulk quote with your target volume and packaging; CoA and SDS are available on request.
Disclaimer. Information on this page — including chemical properties, identifiers, hazard, transport (DOT/UN) and tariff (HS) classifications, and applications — is provided for general reference and is compiled from authoritative public sources. Values are typical and are not a guaranteed specification; the Certificate of Analysis (CoA) for the lot you purchase governs. Products are sold for industrial and professional use only. Nothing here is a medical, health, or efficacy claim, or advice. Always consult the current Safety Data Sheet (SDS) before handling, storage, transport or disposal, and confirm regulatory status, classification and suitability for your application and jurisdiction. Hazard, transport and tariff classifications must be verified for your specific shipment. RawSource makes no warranty, express or implied, and assumes no liability for use of this information.