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Polydimethylsiloxane (PDMS) belongs to a group of polymeric organosilicon compounds that are commonly referred to as silicones. PDMS is the most widely used silicon-based organic polymer, and is particularly known for its unusual rheological (or flow) properties. PDMS is optically clear, and, in general, inert, non-toxic, and non-flammable. It is also called dimethicone and is one of several types of silicone oil (polymerized siloxane). Its applications range from contact lenses and medical devices to elastomers; it is also present in shampoos (as dimethicone makes hair shiny and slippery), food (antifoaming agent), caulking, lubricants, kinetic sand, and heat-resistant tiles.
Basic Info
Numbering system
Properties
Safety Info
Basic Info
| Chemical Name | Dimethylsilicone oil |
| CAS No. | 63148-62-9 |
| Molecular Formula | C2H8O2Si |
| Molecular Weight | 92.16920 |
| PSA | 40.46000 |
| LogP | -0.32720 |
Numbering system
| EINECS number | 613-156-5 |
Properties
| Appearance & Physical State | clear, colorless liquid |
| Density | 0.963 |
| Boiling Point | 101ºC(lit.) |
| Melting Point | -50ºC |
| Flash Point | 300ºC |
| Refractive Index | 1.403-1.406 |
| Stability | Stable. Incompatible with strong oxidizing agents. |
| Storage Condition | Keep away from sources of ignition. Store in a cool, dry place. Store in a tightly closed container. |
| Vapor Density | >1 (vs air) |
Safety Info
| RTECS | CU6530000 |
| Safety Statements | S16; S24/25; S62; S45; S36/37; S26; S53 |
| HS Code | 2942000000 |
| WGK Germany | 3 |
| RIDADR | UN 1993 3 |
| Risk Statements | R11; R65; R48/23/24/25; R36/38; R46; R45 |
| Hazard Codes | F |
| Hazard Declaration | H411 |
| Symbol | GHS09 |
| Caution Statement | P273 |
Silicone oil is used as a defoamer for food, cosmetics, paper, water treatment, detergent, sugar, fermentation, paint, textile printing and dyeing, drilling and refining, hydraulic oil and advanced lubricant, Chemicalbook release agent and many other aspects; used as raw material for silicone resin and silicone rubber; raw material for adhesive; additive for flame retardant plastic; raw material for insulating material; also used as a wetting agent, leather finishing agent, etc.
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