This is a tapered wall style reaction vessel for prep-scale photolysis

Tapered sides assure that the effective area of a 450w or 550w photochemical lamp can be entirely submersed into the liquid, contrary to traditional round bottom reaction flasks. Net result is approximately a 20% savings in reaction time. An additional advantage of this design is in the initial mixing of reactants. The flat bottom allows immediate stirring with a magnetic stirrer and after only one-third full, mechanical stirring can be implemented. Center neck is #50 Ace-Thred for use with 450 mm Immersion Wells. Threaded design offers convenience of vertical depth positioning of well to suit your needs. Two side joints are standard taper 29/42, one for 10 mm stirring shaft and bearing, the other for charging flask or condenser. Two front ports are #7 Ace-Threds, one with 7 mm I.D. bushing for a thermometer, the other with 8 mm I.D. bushing for sparger tube.