Asulam is a carbamate ester that is methyl carbamate substituted by a (4-aminophenyl)sulfonyl group at the nitrogen atom. A dihydropteroate synthase inhibitor, it is used (normally as the corresponding sodium salt, asulam-sodium) as a herbicide, mainly for killing bracken. It has a role as a herbicide, an agrochemical, a xenobiotic, an EC 2.5.1.15 (dihydropteroate synthase) inhibitor and an environmental contaminant. It is a carbamate ester, a sulfonamide, a substituted aniline and a primary amino compound. It is a conjugate acid of an asulam(1-).