The Sirchie NARK KN Reagent is designed to identify THC in Marijuana dried plant material, seeds or fresh green plant. This test is used in sequence with the Duquenois-Levine Reagent and microscope identification. The 2nd ampoule will develop a layering tomato paste red color indicating a positive reaction. Like all NARK narcotic field tests, the KN Reagent is meant for presumptive field drug testing.
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