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Question from my support group- BACKGROUND-58 year old male, PD since age 40, had Testicular cancer, worked for railroad . Herbicide SUPARAQUAT with the main ingredient being MPTP (1-METHYL 4-PHENYL-1236 TETRAHYDROP-UNDINE) does anyone know--- The year manufactured? The chemical name? The manufacturer's name? The year outlawed? Thanks. Margie Carnegie,PA.