2-Carboxy-5-nitrobenzenesulfonic acid potassium salt

Potassium 2-Carboxy-5-nitrobenzenesulfonate is an intermediate in the synthesis of N,N-Dimethyl-2-aminosulfonyl-4-formamidobenzamide (D896870), a key intermediate in the preparation of the sulfonylurea herbicide Foramsulfuron (F685003).