2,6-Dichloro-α-(4-chlorophenyl)(cyano)methylbenzenediazonium Chloride is an intermediate used in the synthesis of Diclazuril-13C3,15N2 (D436202), which is the labelled analogue of Diclazuril (D436200). Diclazuril is a nucleotide analogue with broad-spectrum anticoccidial activity and a coccidiostat.