Presumptive test designed to identify Methadone. Place a small amount of the substance into the test. Upon breaking and agitating the test, a Dark Blue will develop in the presence of Methadone. ODV 7606 NarcoTest Mandelin Reagent (Methadone Test) odv-7606Regular price: $19.99Sale price: $12.95 Copyright 2012 Police Supply Online providing Police Equipment to over 300 Police, Federal & Military Law Enforcement Agencies around the world.