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Choose from the following reagents: Nitric acid reagent is designed to differentiate between Heroin/Morphine Cobalt-Thiocyanate reagent will identify Cocaine, Procaine and Tetracaine Mandelin reagent is for Methadone, Amphetamines or Methamphetamine Duquenois reagent is for THC Modified Cobalt-Thiocyanate reagent is a more specific field test for Cocaine and will distinguish between Cocaine HCl and Cocaine Base Sodium Nitroprusside reagent is designed for Methamphetamine and MDMA (Ecstasy)