N421® is a general farm and hygiene product manufactured by Progien. It contains benzylammonium chloride. It can be used for cleaning organic residues on the exterior surfaces of milking parlors, milking equipment, calf hutches, and the exterior surfaces of cooling tanks. The recommended usage concentration is 140 ml of product per 100 liters of water. It provides effective cleaning with foam application. Its protective agents prevent damage to stainless steel, plastic, rubber, and tile surfaces. Additionally, it has a pine scent, enhancing farm hygiene.