Barrett Distilling Flasks
These 200mL Barrett distilling flasks are used for grading benzol distilled from coal tar by the Koppers process. Reference: Journal of Industrial and Engineering Chemistry, Vol. X, 1918, P. 1006; and Barrett tests E4 and E5. The side arm is approximately 120 ± 3mm from the bottom of the flask, as required in ASTM E-1405. These flasks can be used in ASTM tests D-850, D-1078 and D-455. Flasks take a No. 3 rubber stopper.