Emeramide, also known as NBMI or N,N'-Bis(2-mercaptoethyl)isophthalamide, is a mercury/heavy metal chelator. Emeramide molecule consists of two thiol groups and linked via a pair of amide groups. NBMI can be used to chelate heavy metals like lead, cadmium, copper, manganese, zinc, iron, and mercury from ground water, coal tailings, gold ore, waste water of battery-recycling plants, and contaminated soil.