The reagent that began it all. Marquis reagent was the first reagent that our very own Emanuel Sferios developed for harm reduction use back in 1999, when he began testing ecstasy tablets at raves in the San Francisco Bay Area. It is the first step in identifying the presence of MDMA, and can also be used to identify amphetamines, 2C-B, and other substances. We price all our reagents lower than anywhere else because we want these tools to be more widely available. And 100% of our proceeds are distributed to independent, peer-based harm reduction organizations around the country. Questions? Email, call or text. Emanuel always responds quickly. Good for 50-75 tests. Instructions and color chart below, and also come with every order. DISCREET SHIPPING – The return address just says “GRHR.”