PRODUCT IDENTIFICATION

CLASSIFICATION

Siloxane

PHYSICAL AND CHEMICAL PROPERTIES

clear liquid

Insoluble

AUTOIGNITION

340 C

NFPA RATINGS

REFRACTIVE INDEX

FLASH POINT

-1 C

GENERAL DESCRIPTION & EXTERNAL LINKS

Wikipedia Linking

Google Scholar Search

Material Safety Data Sheet

http://jcp.aip.org/
The dissociative recombination of electrons with the hexamethyldisiloxane (HMDSO) cation ((CH₃)₃Si–O–Si(CH₃)₃)⁺ and the pentamethyldisiloxane cation ((CH₃)₃Si–O–Si(CH₂)₂)⁺ as well as the ion-molecule reaction between Ar⁺ and HMDSO have been studied at 300 K using a flowing afterglow Langmuir probe-mass spectrometer apparatus. The rate constants for these reactions, measured directly for the first time, are, respectively, α₁ = 1.8×10⁻⁶, α₂ = 3.6×10⁻⁶ cm³/s, and k = 2.0×10⁻⁹ cm³/s with uncertainties of ±30%. In addition, the electronic attachment to neutral HMDSO was also studied and an upper limit value of the rate constant was determined to be β = 3.3×10⁻¹¹ cm³/s

Local
Siloxane is a silica-based organic or inorganic polymer with base structure R₂SiO in which R is alkyl group. Siloxane polymer exists in a form of oily liquid, grease, rubber, resin, or plastic. Hexamethyldisiloxane is a general purpose volatile siloxane fluid having properties of clear; non-toxic; low surface tension and non-greasy as well as high compatibility with the lipophilic; high compressibility; high damping action; high dielectric strength; high water repellency and high stability. Unlike other volatile carriers, volatile silicone fluids do not cool the skin when they evaporate. Applications include personal care products; chemical manufacturing; plastic additives; damping fluid; water repellant; hydraulic fluid; lubricants; heat transfer fluid; mold release agent; break fluids; corrosion inhibition film; polish component;

APPEARANCE

Clear liquid

99.0% min

VISCOSITY

0.65 (mm².s^-1 at 25 C)