Poly(dimethyl)siloxane

Silicone gum rubber (methyl)

Gas chromatographic reagent grade of commerce.

Organosilicon polymer with the appearance of a semi-liquid, colourless gum. The infrared absorption spectrum, Appendix II A, obtained by applying the reagent, if necessary dispersed in a few drops of carbon tetrachloride, to a sodium chloride plate does not show absorption at 3053 cm^–1, corresponding to vinyl groups.