• Description: A newer, highly specialized two-part reagent specifically designed to identify ketamine and separate it from a massive wave of novel dissociative analogs.
• Primary Targets: Ketamine (turns a distinct bright purple). It is heavily utilized to differentiate true ketamine from lookalikes like DCK, 2-FDCK, or Cocaine (which turns green/blue).

⚠️ Important Safety Note: Reagent tests only look for the presence of a substance, not its purity. If a sample is 90% a toxic filler and 10% MDMA, a Marquis test will still turn black, masking the filler completely. They should also always be paired with Fentanyl testing strips for optimal harm reduction.