Important pharmaceutical intermediates can be synthesized into drugs such as piperazine phosphate, 

piperazine citrate, piperazine adipate, guanidine, methyltetracycline, quetiapine phosphate, metronidazole, 

enoxacin, hydroxyzine hydrochloride, perphenazine, triflurazine, ethylamine citrate, narizine, flunarizine, 

dechlorinated hydroxyzine, levodopa, fluphenazine, hydrogenated prednisolone phosphate sodium, dexamethasone 

phosphate sodium, pipemidic acid, norfloxacin, ciprofloxacin, cough suppressant, methylphenidate, trimethoprim, etc. 

It is also used in the production of wetting agents, emulsifiers, dispersants, antioxidants, preservatives, stabilizers, plastic processing and rubber additives.