Simons reagent will turn bright blue immediately in the presence of drugs that are secondary amines, such as MDMA or methamphetamine. It is the second step in identifying MDMA because it can distinguish between MDMA and MDA. It can also differentiate methamphetamine (a secondary amine) from amphetamine. The test should only be performed after using Marquis reagent first. Or get the full MDMA test kit. Our price is 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.”