N-OCTADECYLTRICHLOROSILANE CAS112-04-9

Trichlorooctadecylsilane

Silane,trichlorooctadecyl-;Trichlorooctadecylsilane;Octadecyltrichlorosilane;n-Octadecyltrichlorosilane;OTS;Stearyltrichlorosilane;NSC 96644;OTS (silane derivative);LS 6495

112-04-9

C18H37Cl3Si

InChIKey=PYJJCSYBSYXGQQ-UHFFFAOYSA-N

387.93

387.93

1778847

203-930-7

1QLE771PKE

96644

1800

Water-white liquid

29319090

Organic Reagents

0

13.22

Octadecyltrichlorosilane appears as a colorless liquid with a pungent odor. Decomposed by water to hydrochloric acid with the evolution of heat. Corrosive to metals and tissue. Used to make various silicon containing compounds.

0.950 g/cm³ @ Temp: 22 °C

22 °C

223 °C

193 °F

n 20/D 1.459(lit.)

Decomposes in water;soluble in benzene, ethyl ether, heptane, and perchloroethylene

2-8°C

<5 mm Hg ( 20 °C)

>1 (vs air)

Flammable; emits toxic hydrogen chloride gas in water; emits toxic gas in fire

Octadecyltrichlorosilane is an explosive hazard.

Combustible|Reacts with water or steam to produce toxic and corrosive fumes|The reaction of organosilanes with halogens and halogen cmpd usually proceeds in good yield through cleavage of the Si--H bond and formation of the silicon-halogen bond. Reaction with fluorine, however, does not proceed satisfactorily because of cleavage of not only the Si--H but also C--Si and C--H bonds. Direct halogenation with chlorination, bromine, and iodine proceeds smoothly, however. /Organosilanes/

Reacts violently with water, steam, moist air, alcohols, acetone, light metals with generation of heat and combustible (H2), and corrosive (HCl) gases. On contact with air it gives off HCl gas [Handling Chemicals Safely 1980. p. 924]. Octadecyltrichlorosilane reacts vigorously with water to generate gaseous HCl. Based on a scenario where the chemical is spilled into an excess of water (at least 5 fold excess of water), half of the maximum theoretical yield of Hydrogen Chloride gas will be created in 2.8 minutes. After mixing particular chemicals into water, there may be a delay of 1-10 minutes before gas generation may be observed. For this chemical, a 420 second induction time was observed. Experimental details are in the following: "Development of the Table of Initial Isolation and Protective Distances for the 2008 Emergency Response Guidebook", ANL/DIS-09-2, D.F. Brown, H.M. Hartmann, W.A. Freeman, and W.D. Haney, Argonne National Laboratory, Argonne, Illinois, June 2009.

Chlorosilanes

Water-Reactive

Chlorosilanes, such as OCTADECYLTRICHLOROSILANE, are compounds in which silicon is bonded to from one to four chlorine atoms with other bonds to hydrogen and/or alkyl groups. Chlorosilanes react with water, moist air, or steam to produce heat and toxic, corrosive fumes of hydrogen chloride. They may also produce flammable gaseous H2. They can serve as chlorination agents. Chlorosilanes react vigorously with both organic and inorganic acids and with bases to generate toxic or flammable gases.

Corrosive