Nark Duquenois Reagent10 tests per box For presumptive field drug testing Best if used within 3 years 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
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