Dimethyl-diphenylpolysiloxane
Synonym(s):Polyphenyl-methylsiloxane
- CAS NO.:68083-14-7
- Empirical Formula: C16H22O2Si2
- Molecular Weight: 302.51568
- MDL number: MFCD00132673
- EINECS: 203-492-7
- Update Date: 2026-01-13 11:13:41
What is Dimethyl-diphenylpolysiloxane?
Description
Silicone oil (dimethyl-diphenylpolysiloxane) is a class of organosilane compounds typically featuring dimethyl and diphenyl groups, forming a distinctive siloxane (Si-O) backbone structure. The coexistence of methyl and phenyl groups significantly enhances their thermal stability, flexibility, and chemical resistance, making them suitable for diverse applications including sealants, adhesives, and coatings. These compounds exhibit low surface tension, conferring excellent wetting properties, and are frequently employed in formulations demanding high-performance characteristics. Furthermore, renowned for their low toxicity and biocompatibility, they are well-suited for medical and cosmetic sectors.
The Uses of Dimethyl-diphenylpolysiloxane
Silicone oil is used in high temperature open systems, closed systems and circulating, closed loop and heat transfer baths. It is used as a high temperature fluid for laboratory research apparatus and instruments. It is also used as a calibration media in temperature controlled baths.
Chemical properties
Dimethyl-diphenylpolysiloxane is a viscous liquid, a solidified melt or a supercooled melt.
Hazard
Low toxicity by ingestion. A mild eye irritant.
Properties of Dimethyl-diphenylpolysiloxane
| Melting point: | -50 °C |
| Boiling point: | >140 °C0.002 mm Hg(lit.) |
| Density | 1.09 g/mL at 20 °C |
| vapor density | >1 (vs air) |
| vapor pressure | <5 mm Hg ( 25 °C) |
| refractive index | n |
| Flash point: | >230 °F |
| storage temp. | no restrictions. |
| form | Liquid |
| Specific Gravity | 0.98 |
| color | Colorless |
| Water Solubility | Miscible with aliphatic, aromatic hydrocarbons, alcohol and chlorinated hydrocarbons. Immiscible with water, methanol and ethylene glycol. |
| CAS DataBase Reference | 68083-14-7 |
| EPA Substance Registry System | Dimethyl diphenyl siloxanes and silicones (68083-14-7) |
Safety information for Dimethyl-diphenylpolysiloxane
| Signal word | Danger |
| Pictogram(s) |
![]() Corrosion Corrosives GHS05 |
| GHS Hazard Statements |
H314:Skin corrosion/irritation |
| Precautionary Statement Codes |
P280:Wear protective gloves/protective clothing/eye protection/face protection. P363:Wash contaminated clothing before reuse. P301+P330+P331:IF SWALLOWED: Rinse mouth. Do NOT induce vomiting. P303+P361+P353:IF ON SKIN (or hair): Remove/Take off Immediately all contaminated clothing. Rinse SKIN with water/shower. P305+P351+P338:IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing. |
Computed Descriptors for Dimethyl-diphenylpolysiloxane
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