For people looking to purchase reagents related to testing drugs for the purpose of harm reduction, they will not be able to find them on Amazon. As of February 8th, all vendors trying to sell test kits on the platform could no longer be found.
Mixtures like the Mandelin, Mecke, Marquis, and Simon’s reagents can be used to test adulterants and other unwanted chemicals such as fentanyl or fillers in substances like ecstasy pills, cocaine, ketamine, and more. These products were popularized by non-profit organizations like DanceSafe who perform these tests in person at music events, but can be done at home as well. Science shows that these kits save lives, but their sale is strictly against the Amazon Terms of Service.
So far, the company has not made any formal announcement regarding the move, but for those looking to keep themselves or their friends safe, a basic testing kit from DanceSafe can be found here.