Polydimethylsiloxane, hydroxy terminated, M.W. 4200 | CAS No. 70131-67-8

Q: What is Polydimethylsiloxane, hydroxy terminated (CAS: 70131-67-8)?

Polydimethylsiloxane (PDMS), hydroxy terminated (CAS: 70131-67-8), is a synthetic silicone oil with a molecular weight of 4200. It features hydroxyl (-OH) end groups and a polymeric structure of -Si(CH3)2-O- repeating units. This compound is colorless, non-reactive, and exhibits low surface tension, high thermal stability, and excellent water repellency, making it versatile for various industrial and scientific applications.

Q: What are the main uses of Polydimethylsiloxane, hydroxy terminated (CAS: 70131-67-8)?

Polydimethylsiloxane (PDMS), hydroxy terminated (CAS: 70131-67-8), is widely used in pharmaceuticals as a carrier for drugs and medical devices. In industry, it serves as a lubricant, sealant, and antifoam agent. Food-grade applications include use in packaging and processing equipment. It is also employed in research for coatings, elastomers, and as a base for other silicone compounds due to its stability and compatibility with diverse materials.

Q: Is Polydimethylsiloxane, hydroxy terminated (CAS: 70131-67-8) safe?

Polydimethylsiloxane (PDMS), hydroxy terminated (CAS: 70131-67-8), is generally considered safe when handled properly. It has low toxicity and is non-irritating to skin and eyes. However, precautions include avoiding inhalation of vapors, ensuring no ingestion, and using protective gloves and ventilation. Safety standards ensure compliance with regulations for food, pharmaceutical, and industrial applications, minimizing health and environmental risks.

Q: How should Polydimethylsiloxane, hydroxy terminated (CAS: 70131-67-8) be stored?

Polydimethylsiloxane (PDMS), hydroxy terminated (CAS: 70131-67-8), should be stored in a cool, dry place away from direct light and heat sources. Maintain low humidity to prevent degradation, and keep it in airtight containers, preferably made of glass or plastic. Ensure storage in well-ventilated areas to avoid vapor accumulation. This compound is stable under normal conditions but should be protected from contamination to preserve its properties.

Polydimethylsiloxane, hydroxy terminated, M.W. 4200

Basic Information

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CAS Number

70131-67-8

Molecular Formula

C2H8O2Si

Molecular Weight

92.17 g/mol

EINECS

615-070-3

Chemical Classification

Basic Chemical Raw Materials Organic Chemicals Hydrocarbons

Basic Physical Properties

Melting Point

<-60°C

Boiling Point

182 °C

Density

0.98 g/mL at 25 °C

Water Solubility

Soluble in carbon tetrachloride, benzene, chloroform, diethyl ether, toluene and other organic solvents. Insoluble in water and ethanol.

Flash Point

155 °F

Refractive Index

n20/D 1.406

SMILES

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C[Si](O)(O)C

InChI

InChI=1S/C2H8O2Si/c1-5(2,3)4/h3-4H,1-2H3

InChIKey

XCLIHDJZGPCUBT-UHFFFAOYSA-N

LogP

-0.32720000000000005

Topological Polar Surface Area

40.46 Å²

Hydrogen Bond Donor/Acceptor

2 / 2

Synonyms & References

English

SILICON PS 347.5
SILANOL TERMINATED POLYDIMETHYLSILOXANE
SILANOL TERMINATED POLYDIMETHYLSILOXANE,18000CS
SILANOL TERMINATED POLYDIMETHYLSILOXANES
PS 347.5
POLYDIMETHYLSILOXANE, DIHYDROXY TERMINATED
POLYDIMETHYLSILOXANE, SILANOL TERMINATED
baysilonc0.7
POLY(DIMETHYLSILOXANE), HYDROXY TERMINATED VISCOSITY 90-120 CENTISTOKES MW4200
Polysiloxanes, di-Me,hydroxy-terminated
Silanol terMinated polydiMethylsiloxane cSt 5000
SILANOL TERMINATED POLYDIMETHYLSILOXANE, 1,000 cSt
Polydimethylsiloxane
Silanol Terminated PDMS Fluid
PolydiMethylsiloxane, hydroxy terMinated, M.W. 4200
PDMS

MDL Number

MFCD01325012

EC Number

615-070-3

FAQ

What is Polydimethylsiloxane, hydroxy terminated (CAS: 70131-67-8)?

Polydimethylsiloxane (PDMS), hydroxy terminated (CAS: 70131-67-8), is a synthetic silicone oil with a molecular weight of 4200. It features hydroxyl (-OH) end groups and a polymeric structure of -Si(CH3)2-O- repeating units. This compound is colorless, non-reactive, and exhibits low surface tension, high thermal stability, and excellent water repellency, making it versatile for various industrial and scientific applications.

What are the main uses of Polydimethylsiloxane, hydroxy terminated (CAS: 70131-67-8)?

Polydimethylsiloxane (PDMS), hydroxy terminated (CAS: 70131-67-8), is widely used in pharmaceuticals as a carrier for drugs and medical devices. In industry, it serves as a lubricant, sealant, and antifoam agent. Food-grade applications include use in packaging and processing equipment. It is also employed in research for coatings, elastomers, and as a base for other silicone compounds due to its stability and compatibility with diverse materials.

Is Polydimethylsiloxane, hydroxy terminated (CAS: 70131-67-8) safe?

Polydimethylsiloxane (PDMS), hydroxy terminated (CAS: 70131-67-8), is generally considered safe when handled properly. It has low toxicity and is non-irritating to skin and eyes. However, precautions include avoiding inhalation of vapors, ensuring no ingestion, and using protective gloves and ventilation. Safety standards ensure compliance with regulations for food, pharmaceutical, and industrial applications, minimizing health and environmental risks.

How should Polydimethylsiloxane, hydroxy terminated (CAS: 70131-67-8) be stored?

Polydimethylsiloxane (PDMS), hydroxy terminated (CAS: 70131-67-8), should be stored in a cool, dry place away from direct light and heat sources. Maintain low humidity to prevent degradation, and keep it in airtight containers, preferably made of glass or plastic. Ensure storage in well-ventilated areas to avoid vapor accumulation. This compound is stable under normal conditions but should be protected from contamination to preserve its properties.