Table I. Gas Chromatographic Analysis of Normally Frozen Benzene Chromatograph: Perkin-Elmer 154 Column: 20y0 2,4dimethyltetramethylenesulfoneon 60-80 mesh not-acid-washed firebrick, 2 meters long, 0.25-inch diam. Temp. 52" C. Area Normally frozen Normally frozen T R ~ with stirring without stirring Starting material t b 0,078 t t 0,084 t t 0.091 t 0.10 0.01 0.01 0.14 0.5 0.4 0.06 0.16 0.3 0.01 0.18 0.3 0.4 0.05 0.20 0.05 0.06 0.24 t t 0.2 0.27 0.1 0.03 0.02 0.30 0.02 0.55 t 1.00 99 98 99 0.4 0.3 2.00 1.59 Total impurity 1.22 0.18
+
+
Retention time relative to benzene. *Trace,
