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.
The Church distilling flask is used for the distillation of bituminous materials suitable for road treatment. Also used in the Standard Method of Test of the Distillation of Creosote Oil, American Wood Preservers Association, method 11e, Barrett method C9, American Association of State Highway officials, methods T 52 and T 62. Flask takes a No. 5 rubber stopper. Reusable. Material: Borosilicate Glass Code 7740.
Sidearm distilling flasks are used are suitable for microchemical applications. The sidearm is approximately 77mm below the top of the neck at an angle of 75°. Adaptable for use with thermometers calibrated for 76mm immersion. Flasks take a standard rubber stopper according to neck size.