Poly(dimethylsiloxane)

Synonym(s):Polydimethylsiloxane;Dimethylpolysiloxane;Octamethyltrisiloxane;α-(Trimethylsilyl)-ω-methylpoly[oxy(dimethylsilylene)] mixture with silicon dioxide;Antifoam A

CAS NO.：9016-00-6
Empirical Formula: C5H6Si
Molecular Weight: 94.18664
MDL number: MFCD00148360
EINECS: 618-493-1
SAFETY DATA SHEET (SDS)
Update Date: 2024-05-07 17:43:10

Poly(dimethylsiloxane) Structural Picture

What is Poly(dimethylsiloxane)?

Description

Polydimethylsiloxane (PDMS) is the simplest member of the silicone polymer family. It is formed by hydrolyzing Me2SiCl2, which is produced from high-purity SiO2?and CH2Cl2?by the Muller–Rochow reaction. The term “silicone” was coined by chemist F. S. Kipping in 1901.
Low–molecular weight PDMS is a liquid used in lubricants, antifoaming agents, and hydraulic fluids. Its use in breast implants is not as popular as it once was because of safety concerns.
At higher molecular weights, PDMS is a soft, compliant rubber or resin. It is used in caulks, sealants, an even Silly Putty. More recently, PDMS resins have been used in soft lithography, a key process in biomedical microelectromechanical systems (bio-MEMS).

The Uses of Poly(dimethylsiloxane)

Poly(dimethylsiloxane) is an antifoaming agent used in fats and oils. It prevents foaming and spattering when oils are heated and prevents foam formation during the manufacture of wine, refined sugar, gelatin, and chewing gum. It is also termed methyl polysilicone and methyl silicone.

Properties of Poly(dimethylsiloxane)

Melting point:	-35°C
Boiling point:	155-220°C
Density	0.971
Flash point:	63°C
storage temp.	Refrigerator
solubility	Chloroform (Slightly), Methanol (Slightly)
form	Viscous Liquid
color	Colorless
Water Solubility	INSOLUBLE

Safety information for Poly(dimethylsiloxane)

Signal word	Danger
Pictogram(s)	Flame Flammables GHS02
GHS Hazard Statements	H226:Flammable liquids H227:Flammable liquids
Precautionary Statement Codes	P210:Keep away from heat/sparks/open flames/hot surfaces. — No smoking. P240:Ground/bond container and receiving equipment. P241:Use explosion-proof electrical/ventilating/lighting/…/equipment. P303+P361+P353:IF ON SKIN (or hair): Remove/Take off Immediately all contaminated clothing. Rinse SKIN with water/shower. P403+P235:Store in a well-ventilated place. Keep cool.