Intermediates S.No PRODUCT NAME CAS NO END STAGE 1 Citirizine di hydrochloride A P- chloro benzophenone 134-85-0 KSM-1 B P- chloro Benzhydryl chloride 134-83-8 Key intermediate C 1-(4-Chlorobenzhydryl)piperazine 303-26-4 Key intermediate ProductsHuman API Veterinary API Intermediates