How to prepare benzocaine (fischer esterification )<br>Add a magnetic stir bar , 1.0 g of p-aminobenzoic acid, and 10ml of absolute ethanol to a round bottom flask. Swirl the mixture until the solid is completely dissolved. Add 1ml of concentrated sulfuric acid drop wise with a pasteur pipette to the ethanol-aminobenzoic solution.
Stir bars cannot be magnetic.
( z1 possible :polarity - :ARG1 ( z2 magnet :domain ( z3 bar :ARG0-of ( z4 stir ) ) ) )