... , refrigeration etc.3) Agrochemical Intermediates, Dyestuff Intermediates, Flavor & Fragrance Intermediates, Pharmaceutical Intermediates, Syntheses Material Intermediates4) widely used as pharmaceutical intermediates, polyurethane foaming agent / blowing ... colorless liquid. It is used for reaction intermediate in pharmaceutical industry, and used to produce ampicillin trihydrate, carbenicillin, ...