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For more information, or to download product instructions,
Thermo Scientific Siliconizing Fluids
Siliconizing Fluid – Hydrocarbon Soluble
A hydrocarbon soluble fluid for siliconizing glass surfaces.
Si
CH
3
O
CH
3
CI
Si
CH
3
O
CH
3
Si
CH
3
CI
CH
3
n
Siliconizing Fluid –
Hydrocarbon Soluble
Thermo Scientific Hydrocarbon Soluble Siliconizing Fluid is
a short chain, clear polymeric silicone fluid consisting
primarily of dichlorooctamethyltetrasiloxane. When applied
to glass, quartz or similar products, the unhydrolyzed
chlorines present on the chain react with surface silanols to
form a neutral, hydrophobic and tightly bonded film over the
entire surface.
Our Hydrocarbon Soluble Siliconizing Fluid is ideal for use
on metals, certain plastics, ceramics and fiber optics.
Our Hydrocarbon Soluble Siliconizing Fluid is acidic and
care should be taken to avoid corrosion of metal that comes
into contact with the liquid. The fluid is acidic only during
application. After application the surface is neutral.
Caution:
Material is flammable before film is formed and HCI fumes
are generated in the application.
Instructions for Use
Wipe-on treatment:
Wearing rubber gloves, wet a cloth with
undiluted fluid and rub it on the clean surface until an oily
film is formed. Rub with a dry cloth until the surface is clear.
Solution treatment:
Dilute Hydrocarbon Soluble Siliconizing
Fluid with 1-10% clean dry solvent such as acetone, toluene,
carbon tetrachloride, methylene chloride or hexane. Do not
use esters or alcohols. Articles can be dipped and air-dried.
No heating is required. For a slightly more durable coating,
heat articles at 100°C for 30 minutes.
Our Hydrocarbon Soluble Siliconizing Fluid (as supplied) is
stable for at least one year. Discard prepared solutions after
use.
Jevons,
et al.
reported treating all glassware with a 10% v/v
solution of Siliconizing Fluid – Hydrocarbon Soluble in
carbon tetrachloride.
1
Ordering Information
Product # Description
Pkg. Size
✖
TS-42800
Siliconizing Fluid-Hydrocarbon
120 ml
Soluble
✖
TS-42801
Siliconizing Fluid-Hydrocarbon
480 ml
Soluble
✖
TS-42855
Siliconizing Fluid-Hydrocarbon
5 x 10 ml
Soluble
ampules
✖
Additional hazardous handling charge.
Monofunctional Silane – HMDS
Ideal for active surface site deactivation.
HMDS
MW 161.4
bp 125
˚
C
n
d
20
1.4071
Si
CH
3
NH
Si
CH
3
CH
3
CH
3
CH
3
CH
3
Thermo Scientific HMDS is a popular monofunctional silane
that many researchers have found useful for deactivating
and coating chromatographic supports. Because of its
monofunctional nature, this silane can react with only one
site on the surface. Polymerization is not possible,
eliminating the chances for unbound polymers to float free
and elute from the column – avoiding exposure of unreacted
silanols beneath the layer. In addition, surface moisture is
eliminated because monofunctional reagents dehydrate the
surface.
There are several methods for deactivating surfaces with
HMDS:
1. Slurrying or dipping the items to be deactivated in a
5-10% solution of the reagent in an unreactive solvent.
2. Vapor phase deactivating by pulling straight vapor into an
evacuated container that holds the item to be
deactivated.
3. Placing the item and a few milliliters of the reagent in a
beaker, then placing a watch glass on top (as in the case
of glass wool silanization).
References
1. Nawrocki, J. (1985). Modification of silica with mixture,
at hexamethylcyclotrisilazane.
Chromatographia
20(5)
.
2. Owens, N.F.,
et al.
(1987). Inhibition of cell adhesion by a synthetic polymer
absorbed to glass shown under defined hydrodynamic stress.
J. Cell Sci.
87
, 667-675.
Ordering Information
Product # Description
Pkg. Size
✖
TS-84769
HMDS (Hexamethyldisilazane)
100 g
TS-84770
HMDS (Hexamethyldisilazane)
25 g
✖
Additional hazardous handling charge.
