Meth is usually a white powder with no smell and a bitter taste. Crystal meth looks like glass fragments or bluish-white rocks. Test Kitsĭrug test and harm reduction kits are available that use specific reagents to identify a wide range of compounds, including the Marquis, Simon’s, Froehde, Liebermann, Mandelin, Mecke, and Folin reagents. In the tests, a drop of reagent is added to a small amount of the drug. other opioids including heroin, codeine, etc.: colors ranging from magenta to thamphetamine/amphetamine: light orange fading to brown.The Marquis test is generally the first one used.
While these tests may be useful when a dealer sells fake or heavily adulterated meth, they are less useful when meth is still present but is heavily diluted with compounds that don’t react with the reagent. These reactions are also highly subject to user error and inconclusive results.
